Disertación/Tesis

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2024
Disertaciones
1
  • EDISON ANTONIO DE MATTOS
  • SEASONAL CHANGES IN WATER STATUS AND GAS EXCHANGE IN JUVENILE PLANTS UNDER DIFFERENT LIGHT TREATMENTS AND FLORAL VARIATIONS IN Cattleya granulosa Lindley

  • Líder : EDUARDO LUIZ VOIGT
  • MIEMBROS DE LA BANCA :
  • EDUARDO LUIZ VOIGT
  • LEONARDO DE MELO VERSIEUX
  • CRISTIANE GOUVEA FAJARDO
  • Data: 23-feb-2024


  • Resumen Espectáculo
  • Cattleya granulosa is an endangered epiphytic orchid native to the Brazilian Atlantic Forest. Since its responses to light intensity and its CAM expression remain elusive, C. granulosa juvenile plants were grown under full sunlight, 60% shading, and 95% shading in a nursery and plant growth, water status, titratable acidity, and gas exchanges were assessed during the rainy and dry seasons. The plants exposed to full sunlight showed visual symptoms of light stress but survived throughout the experiment. These plants exhibited reduced shoots and extensive roots regarding the plants submitted to shading. The time-course of CO2 uptake and stomatal conductance in C. granulosa leaves over 24 h, independent of treatment, is compatible with constitutive CAM. However, changes in timelapse and magnitude of CO2 uptake and in accumulated acidity promoted by light regime and seasonality reveal that CAM expression in C. granulosa leaves may be modulated according to growing conditions.

2
  • NARDELLA GARDNER DANTAS DE OLIVEIRA
  • Socio-ecological connections for the development of sustainable cities

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • GUSTAVO EDUARDO MARCATTI
  • ALEXANDRE ROSA DOS SANTOS
  • GETULIO FONSECA DOMINGUES
  • Data: 26-feb-2024


  • Resumen Espectáculo
  • Currently, urban ecology has focused on urban vacant land, understanding them as places with latent aesthetic, social, and environmental potentials. By studying the qualities and ecosystem services that urban vacant land present, it is evident that they offer opportunities to address the challenges of contemporary cities. Therefore, this study explores strategies for acquiring new green spaces in Mossoró, a city in the brazilian semi-arid region, by examining connectivity patterns in the urban landscape. Maps were modeled to assess the potential conversion of urban vacant land into green areas and the resistance to human movement in the landscape. The multicriteria analysis in a GIS environment was employed for this purpose. The modeling of the areas with the highest suitability in the city considered urban planning, urban density, stage of urban occupation, urban vacant land, land cover, and their conditioning factors, resulting in a map of priority areas (nodes). Suitability was evaluated as very low (0.03 – 0.22), low (0.23 – 0.42), medium (0.43 – 0.61), high (0.62 – 0.80), and very high (0.81 – 1). In the urban footprint, 429 hectares are considered highly suitable for conversion into green spaces. The creation of the resistance surface combined variables such as highways, public lighting, infant, primary, and secondary schools, bus stops, squares, health centers, and hospitals. The resistance surface showed values between 212 and 1000. Areas with more public amenities and services, such as those with high urban planning, offered lower resistance to human flow in the landscape, promoting random walks of humans and other organisms. Connectivity modeling revealed a low habitat availability for flows in the urban landscape of Mossoró, indicating the latent need for the construction of a multifunctional green infrastructure in the city, especially in peripheral neighborhoods. The urban vacant land in these areas have the potential to be explored to reduce socio-spatial fragmentation in Mossoró, and contribute to regional planning focused on building urban resilience.

3
  • PRISCILA PEREIRA DA SILVA
  • Water memory involves changes in reserve mobilization during seed germination in the Caatinga native species Cenostigma pyramilade

  • Líder : EDUARDO LUIZ VOIGT
  • MIEMBROS DE LA BANCA :
  • CLÁUDIA ULISSES DE CARVALHO SILVA
  • EDUARDO LUIZ VOIGT
  • JULIANA ESPADA LICHSTON
  • Data: 26-feb-2024


  • Resumen Espectáculo
  • Given that water availability plays a central role in seed germination and is a limiting resource in arid and semi-arid environments, a series of experiments were performed to characterize hydration kinetics, reserve mobilization, and water memory in seeds of Cenostigma pyramidale, a tree legume native to the Caatinga. Germination tests were carried out using the paper roll technique, and the contents of water, reserves, and metabolites were assessed during seed hydration until radicle protrusion. Hydration kinetics during germination fitted into the triphasic pattern, although imbibition began slowly and became fast during phase I. Since water uptake by the testa was slower than that by the embryo during phase I, the testa was clearly involved in the regulation of seed imbibition. In seeds germinated under continuous hydration, oils were mobilized in the cotyledons during phases I and III, and non-reducing sugars in the embryonic axis supported phase II. Seeds exposed to a hydration-dehydration cycle revealed changes in the germination process when they were rehydrated. Water uptake became faster by the intact seed and its different parts (testa, embryonic axis, and cotyledons). Also, seeds germinated under discontinuous hydration retained oils but mobilized carbohydrates in the cotyledons. These findings can contribute to understanding the mechanisms used by C. pyramidale seeds to respond to discontinuous hydration and can be applied to protocols for seedling production.

4
  • RODOLPHO STEPHAN SANTOS BRAGA
  • NATURAL DURABILITY OF WOODS FROM Mimosa tenuiflora (Willd.) Poir. AND Mimosa caesalpiniaefolia Benth.

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • JULIANA LORENSI DO CANTO
  • PEDRO NICÓ DE MEDEIROS NETO
  • RAFAEL RODOLFO DE MELO
  • Data: 28-feb-2024


  • Resumen Espectáculo
  • Knowledge of the characteristics and durability of the wood of each species is extremely important so that it can be better disposed of. To this end, this work aimed to determine the natural durability of timber species from the Caatinga Region, Mimosa tenuiflora (Willd.) Poir. (jurema-preta) and Mimosa caesalpiniaefolia Benth. (thrush), in a wood rot field test. The rotting field was implemented in a Forest Experimentation Area, located in the municipality of Macaíba-RN. In this, samples were introduced in two formats: stakes with dimensions of 5.0 x 2.5 x 50.0 centimeters (radial x tangential x longitudinal), and round pieces 1 meter long and with an average diameter between 10 and 15 centimeters. Both pieces were buried in the ground up to half their length, where a randomized block design was used. Annual assessments were carried out to determine the deterioration rate and the deterioration susceptibility index. In conjunction with the analyses, the condition of the bark of the samples, the hardness of the wood in the soil and in the aerial part and the presence of longitudinal cracks in the wood were evaluated in the field, in addition to the mass loss of the specimens and the extraction and quantification of tannins. The results of 3 years of evaluation of the test make it possible to understand that both wood species present good quality and durability in accordance with their natural properties, presenting varied results under different analyses. Furthermore, both showed similar resistance, just like treated eucalyptus. Therefore, it is still necessary to evaluate the species for a longer period in the rotting field.

5
  • NAYANE DA SILVA LIMA
  • USE OF BIOCHAR AND SANEKA MIXTURE ON THE CULTIVATION OF Vigna unguiculata (L.) Walp.: AIMING FOR CULTURE DEVELOPMENT AND PRODUCTIVITY

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • FRANCISCO MARLON CARNEIRO FEIJÓ
  • NEYTON DE OLIVEIRA MIRANDA
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • Data: 29-feb-2024


  • Resumen Espectáculo
  • Brazil is characterized as the largest charcoal producer in the world, a factor that boosts the sector. A product of the carbonization of wood, charcoal, also known in agriculture as biochar, is responsible for improvements in the most diverse aspects of soil and culture. It acts as a good soil conditioner, improves fertility and the development of the root part and its products. The pyroligneous extract is a by-product of the smoke collected during the carbonization process and has properties favorable to the development, rooting and protection against pests in the species. Cowpea is a variety widely produced and consumed in the country. Therefore, the present work aims to analyze the action of biochar and saneka mixtures (biochar + pyroligneous extract) on the development of cowpea (Vigna unguiculata (L.) Walp.), in two stages: green and dry. Furthermore, paying attention to the productivity levels, size, quantity and quality of the grains obtained. Seven treatments were used, one being a control, and the dosages were 3, 6 and 9 ton/ha of biochar and saneka. The treatments had eight replications each. Four seeds were planted, thinning the two least vigorous seeds after the first few weeks after emergence. The variables analyzed were: number of pods, pod length, grain size and weight, and root dry mass. The experiment data was collected after a period of three and a half months. After that, they were subjected to analysis of variance and the means were compared using the Tukey test. It was found that, for beans harvested green, the best treatment was 9 tons for all variables. As for beans harvested green, the most relevant treatment was the smallest, with 3 tons/ha having been applied to all the variables analyzed.

2023
Disertaciones
1
  • CLARICE RIBEIRO CARDOSO
  • MOLECULAR GENETIC CHARACTERIZATION OF PROVENANCE AND PROGENY OF Parkia platycephala Benth.

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • BRUNA ANAIR SOUTO DIAS
  • CRISTIANE GOUVEA FAJARDO
  • MAURO VASCONCELOS PACHECO
  • Data: 16-ene-2023


  • Resumen Espectáculo
  • Parkia platycephala Benth. is a tree species native to transition areas between Cerrado and Caatinga in Brazil, used for various purposes, especially for animal feed due to its high forage potential. Its intense exploitation during the fruiting season, which coincides with the forage shortage period, represents a threat to its genetic conservation in its natural habitat, requiring the study of its genetic variability. Therefore, the research aims to characterize the diversity and genetic structure existing in provenances and progenies of P. platycephala, through molecular marker ISSR (Inter Simple Sequence Repeats), as a subsidy for the genetic conservation of the species and transformation of the test into a seed orchard for seedlings. Sampling was carried out on 45 progenies established in a test of provenance and progenies at the Experimental Farm of the Federal University of Piauí, in Alvorada do Gurgueia, Piauí, Brazil. Genetic analyzes were performed on stem and young leaf material from 180 randomly selected progenies. Estimates of primer efficiency, diversity and genetic structure were obtained from 87 ISSR loci, while the mating system studied by MLTR software. Thirteen ISSR primers were selected that amplified 87 loci, with 100% polymorphism for the species. The primers with the highest efficiency in detecting polymorphism were: CHRIS, M1, UBC 807, 818, 826, 829, 841, 842 and 857, considering the values of polymorphic information content, marker index and resolution power. The genetic diversity of Nei (H) averaged 0.31, and the Shannon index (I) averaged 0.47, with the greatest diversity occurring in the Bom Jesus progenies. The analysis of genetic structure showed a greater degree of genetic variation within populations (82.74%), and a value of Փst (0.17262), indicating moderate genetic structure between provenances. The UPGMA grouping (Unweighted Pair Group Method using Arithmetic) and the Bayesian Analysis (K=4) identified the formation of distinct genetic groups. The mating system is allogamous primarily, with a significant presence of progenies formed by crosses between relatives. These results reveal the importance of maintaining the ex situ conservation of P. platycephala, with promising progenies for producing and propagating seeds for environmental purposes and genetic improvement of the species.

2
  • GIL SANDER PRÓSPERO GAMA
  • EVALUATION OF THE ANTIMICROBIAL ACTION OF NEUTRALIZED AND DOUBLE-DISTILLATE WOOD VINEGAR


  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • ANANIAS FRANCISCO DIAS JÚNIOR
  • FRANCISCO MARLON CARNEIRO FEIJÓ
  • RAFAEL RODOLFO DE MELO
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • Data: 16-feb-2023


  • Resumen Espectáculo
  • Wood vinegar (WV) is a co-product generated in the pyrolysis process of plant biomass that can have a range of applications. Among these applications, it is used as an antimicrobial agent. However, there are statements that limit the antimicrobial action that EP performs only to the fraction of organic acids present in its chemical composition, raising doubts as to its efficiency as a whole. Thus, the objective of this research was to evaluate the antimicrobial activity of WV, test the influence of its pH on this activity, evaluate the chemical composition of this product and record images of scanning electron microscopy (SEM) of microbial cells. Antimicrobial evaluations to determine the Minimum Inhibitory Concentration (MIC) were performed in vitro by the broth microdilution method. For the Minimum Bactericidal and Fungicide Concentrations (MBC and MFC) the agar growth method was used. The chemical composition of WV and its concentrate was determined by gas chromatography and mass spectrometry and the SEM images were obtained with the aid of an electron microscope (Pfeiffer Vacuum – D-35614 Assiar). Statistical analyzes were performed using regression analysis using the R software (version 4.1.3). The results obtained showed that even at neutral pH, WV proved to be effective as an antimicrobial, proving that its action is not limited to a single class of compounds, but to all of them. However, the increase in neutralization influenced the WV concentrations required for the inhibition of the evaluated microorganisms. Both WV obtained from B. vulgaris and E. urograndis played a satisfactory antimicrobial role, inhibiting the development of all tested microorganisms. SEM images demonstrated that WV influences the morphology of the cell wall of microorganisms, resulting in alterations in its structure. It is concluded that these products are promising for the development of effective antimicrobial alternatives. However, further studies are needed to confirm its use, highlighting the need for in vivo tests.

3
  • PEDRO IRAMAR SOUSA PAIVA DO NASCIMENTO
  • USE OF DIGITAL BIOLOGICAL DATABASES IN THE PREPARATION OF CHECKLISTS: THE CASE OF ANGIOSPERMS FROM SERRA DAS ALMAS PRIVATE RESERVE, CEARÁ

  • Líder : LEONARDO DE MELO VERSIEUX
  • MIEMBROS DE LA BANCA :
  • LEANDRO DE OLIVEIRA FURTADO DE SOUSA
  • LEONARDO DE MELO VERSIEUX
  • SAMARA SILVA DE MATOS AQUINO
  • Data: 28-feb-2023


  • Resumen Espectáculo
  • Currently, technological advances are present in all sectors of society and cover, partially or totally, all countries on the globe. Thus, with the availability of information in virtual format, it was necessary that some sectors that until recently could only be accessed in person, become virtual, allowing access by anyone, anywhere. This work seeks to understand the importance and relevance of herbaria collections available on online platforms, making it possible for several Brazilian or foreign researchers to access biodiversity data. The general objective was to produce a checklist with data from the collections of four Brazilian virtual herbaria of angiosperms collected in the Serra das Almas Private Natural Heritage Reserve (RPPN), Crateús/CE, with 6,300 ha of area, predominantly of caatinga vegetation, in the south. of Ceará/border with Piauí. The compilation of the records of the angiosperm collections was carried out through four online platforms (Jabot RB and Geral, SpeciesLinks and Reflora), with 7,525 records being compiled, in which 87 families, 340 genera and 579 species collected in the RPPN between the years of 1997 to 2018. A few identifications, with consultations with specialists and analysis of the digital images of herbarium specimens was done. Attention is drawn to the existence of only two collections related to the Cactaceae family, the high number of species, genera and families without identification in the records obtained, which suggests a specific need to send duplicates to specialists. Over time, there was a peak in collections in the period between 2000-2005. It is concluded that digital databases contribute significantly to floristic knowledge, even in areas previously studied floristically.

4
  • RENATA LARISSA DE ARAÚJO
  • POTENTIAL OF URBAN PRUNING WASTE AS A SOURCE OF ENERGY AND CONDENSED TANNINS

  • Líder : TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • MIEMBROS DE LA BANCA :
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • ALEXANDRE SANTOS PIMENTA
  • RENATA MARTINS BRAGA
  • PEDRO NICÓ DE MEDEIROS NETO
  • Data: 31-may-2023


  • Resumen Espectáculo
  • Biomass is a renewable energy source with the greatest potential to contribute to the energy needs of modern society. The most important sources of biomass come from wood, wood residues, agricultural plantations, grasses and their by-products. Currently, much research has focused on sustainable and ecologically correct energy, in order to find ways to replace conventional fossil fuels with renewable energy sources. The solid residues produced by tree management in the city of Natal-RN are currently crushed and organized in windrows, in order to obtain organic compost for use as fertilizer. The present study sought to find new possibilities for the use of biomass originating from the management, carrying out the evaluation of its use as a source of renewable energy, carrying out the characterization of the material and production of briquettes. In addition to studies on its use as an energy source, the quantification of the tannin content was carried out - a compound that has a strong economic impact on the country - widely used for tanning animal skin, effluent treatment, wood adhesive, among others. After extracting and quantifying the tannins, it was observed that, because it is waste from urban pruning, and because it is not possible to quantify the percentage of leaves, thin branches and bark of each species, the levels of concentrated tannins found in the species were below the desirable for commercial exploitation. The results for the use of briquettes as an alternative source of energy to replace the current energy matrix, proved to be satisfactory and with high potential for the generation of bioenergy and a viable alternative for use in the form of firewood or charcoal. Biomass of urban origin is a resource offered by the environment, as a way of maintaining its own ecosystem; its great advantage is related to the low financial cost, and it can be used as a source of energy generation, changing the condition of waste to a renewable energy source.

2022
Disertaciones
1
  • BRUNO ARAÚJO CORRÊA
  • BABAÇU PRODUCTIVE CHAIN (Attalea Speciosa MART. EX SPRENG) IN THE CITIZENSHIP TERRITORY OF COCAIS MARANHENSE: A VIEW ON SUSTAINABILITY AND POTENTIALITIES

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • PEDRO NICÓ DE MEDEIROS NETO
  • RAFAEL RODOLFO DE MELO
  • Data: 09-feb-2022


  • Resumen Espectáculo
  • The use of non-wood forest products by man has been around since its inception, such products represent an important source of energy, nutrition and income for countless traditional communities. Babassu represents for many families in the state of Maranhão the "Palmeira da Vida" because everything is used. This exploration, when done without proper management of these resources, brings damage to the environment. The objective of this work is to understand the production chain of the babassu coconut, its agents involved, the products and by-products, in addition to the analysis of land use and coverage, and how this impacts this chain. For this purpose, a pre-established historical series was used for four municipalities in the cocais region of Maranhão, Codó, Coroatá, Timbiras and Caxias. For land use and occupation, data from MapBiomas for the years 1987, 2003 and 2019 were used, thus allowing to assess the temporal evolution of that region. For data referring to production and plant extraction, products, by-products and how the babassu production chain works, documental and bibliographic research will be used, as well as the extraction of secondary data from official sources. The partial results of this work indicate that there was a significant evolution in the pasture and agriculture classes in the region, in addition to that there was a decrease in native plant formations, mainly due to the evolution of the previous classes. Thus, it is concluded how transformations occur in the territories of this region and how this can come to impact the production of babassu.

2
  • EDITE SANTOS SIQUEIRA
  • USE OF BIOCHAR IN THE COMPOSITION OF SUBSTRATES FOR THE PRODUCTION OF FOREST SEEDLINGS

  • Líder : MAURO VASCONCELOS PACHECO
  • MIEMBROS DE LA BANCA :
  • ANTELMO RALPH FALQUETO
  • GIVANILDO ZILDO DA SILVA
  • MAURO VASCONCELOS PACHECO
  • Data: 11-feb-2022


  • Resumen Espectáculo
  • New technologies have been developed in the search for reducing production costs and for more sustainable alternatives, such as the use of organic waste from agribusiness, such as biochar, that have potential for the formation of substrate. Biochar is a product rich in carbon, has physico-chemical characteristics capable of decreasing the leaching of nutrients, promoting greater water retention, contributing to the increase in porosity and sanding. Thus, the objective of the present work is to evaluate the effect of adding charcoal residues mixed to different materials in the formation of alternative substrate to produce quality seedlings of the species Tabebuia aurea, Handroanthus impetiginosus e Pityrocarpa moniliformis. The experiment was conducted in a completely randomized design, consisting of eight treatments and four repetitions each. The mixture of the substrate was constituted in the proportions: T1 sand (25%), coconut fiber (50%), expanded vermiculite (25%); T2 sand (25%), coconut fiber (30%), expanded vermiculite (25%), biochar (20%); T3 sand (25%), coconut fiber (20%), expanded vermiculite (25%), biochar (30%); T4 sand (25%), , expanded vermiculite (25%), biochar (50%); T5 commercial substrate Tropstrato® (100%); T6 commercial substrate Tropstrato® (80%), biochar (20%); T7 commercial substrate Tropstrato® (70%), biochar (30%); T8 commercial substrate  Tropstrato® (50%), biochar (50%). The emergency variables were evaluated, the emergence speed index, growth rate diameter the neck, height of the aerial part, height of the aerial/diameter the neck ratio, number of leaves, root system dry mass, shoot dry mass, total dry mass, shoot dry mass/root system ratio and Dickson Quality Score. In general, the addition of 30% of biochar to the commercial substrate for seedling production of T. aurea is a viable alternative for the use of waste. For H. impetiginosus the addition of 20% of biochar to the commercial substrate was ideal for the production of quality seedlings. The addition of 20% of biochar to the commercial substrate provided the greatest increase in quality in the production of P. moniliformis seedlings. The addition of 50% of biochar in the substrate composition decreases the quality of the seedlings. The use of biochar in the substrate composition for seedling production represents a viable, promising and environmentally sustainable alternative.

3
  • JÉSSICA LAMONNIELLY PEIXOTO EPIFÂNIO DE LIMA
  • VOLUMETRIC AND ENERGY PRODUCTIONS OF WOOD AND RECOVERY TIME AFTER CUTTING AS A PARAMETER FOR DEFINING ROTATION IN THE CAATINGA AREA
  • Líder : ROSIMEIRE CAVALCANTE DOS SANTOS
  • MIEMBROS DE LA BANCA :
  • Diego Marcelino do Nascimento
  • ELIZA ROSÁRIO GOMES MARINHO DE ALBUQUERQUE
  • MONICA CRISTINA DAMIÃO MENDES
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • Data: 15-feb-2022


  • Resumen Espectáculo
  • The objective of the research was to evaluate the relationship between wood production, energy stored in wood and the ideal rotation cycle, using information from stands at different regeneration ages on the same property. For this purpose, a rural property that sells wood under sustainable forest management in the state of RN was selected. Based on data from the forest management plan for the area, four stands were selected, with post-harvest ages of 16, 13, 11 and 9 years. In each one, 10 experimental plots with 400m2 were remeasured having as reference the georeferenced data by Carvalho (2018). In each plot, the forest inventory was carried out, the measurement of the total height, circumference at breast height (CAP) and circumference at the base (CNB) of the stems of the individuals of the stands (CAP > 6 cm), as well as the identification of forest species and, later, the characterization of the phytosociological structure, as well as the determination of the wood volumetric production. The amount of energy stored by the average production of the plots was extrapolated to one hectare. The basis for the calculation was the individual volume, multiplied by the respective values of basic wood density and higher calorific value of the most representative species. The relationships between the post-cut time and the volumetric and energy production of the wood were also determined, as well as the prospect of the rotation cycle recommended for the area under study. Data were evaluated according to a stratified casual forest inventory, at 90% probability. Representative species were those that added more than 80% of the IVI (Importance Value Index): Cenostigma sp, Piptadenia stipulacea, Mimosa tenuiflora, Croton sonderianus, Aspidosperma pyrifolium, Andira anthelmia, Combretum leprosum, Mimosa caesalpiniaefolia and Jatropha. As a function of age, the number of species in each stand increased when compared to data from Carvalho (2020). Wood production per hectare ranged from 7.83 to 1.06 m3 and wood volume ranged from 32.0 to 2.40 m³.ha-1. The amount of energy stored in field 1 was 98,190.0 Mkcal.ha-1, for field 8 it was 41,526.6 Mkcal.ha-1, for field 11/12 it was 14,448.4 Mkcal.ha-1 and for plot 6 it was 7,281.9 Mkcal.ha-1 with post-harvest ages of 16, 13, 11 and 9 years, respectively, receiving greater energetic collaboration from Cenostigma sp, Mimosa tenuiflora and Piptadenia stipulacea. The technical cutting age was 16 years.

4
  • YARA LEMOS DE PAULA
  • BIODEGRADABLE TREEPOTS MADE WITH BEE WAX AND WASTES OF CASHEW NUT

  • Líder : RAFAEL RODOLFO DE MELO
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • ELIS REGINA COSTA DE MORAIS
  • FRANCISCO RODOLFO JUNIOR
  • RAFAEL RODOLFO DE MELO
  • Data: 18-feb-2022


  • Resumen Espectáculo
  • Seedling production is commonly carried out in polyethylene bags and polypropylene treepots, raw material from petroleum. In addition to being derived from non-renewable natural resources, they have a long-life cycle and cause a relevant environmental impact. Forest and agro-industrial waste, which also applies to this use, is renewable, easy-to-obtain and biodegradable materials. Thus, the study aims to evaluate the feasibility of using cashew residues associated with beeswax for the manufacture of biodegradable treepots intended for the production of seedlings of forest essences. The treepots will be made with wastes from the processing of cashew nuts previously selected and classified. The cashew nut husks will be used to manufacture the treepots and will be evaluated according to the standards TAPPI ABNT, ASTM and TAPPI, in relation to characterization and quality. Additionally, the biodegradable treepots and conventional treepots will be submitted to the planting of Sabiá (Mimosa caesalpiniifolia Benth.) and evaluated for the development and quality of seedlings produced in a nursery with 50% of shading. The composites produced were analyzed as to the behavior according to the physical-mechanical properties of the material. seedlings and evaluated their development in a greenhouse and in the field. The raw materials chosen were suitable for the manufacture of tubes, in which beeswax has melting temperature at 60°C and cashew nut bark has chemical composition rich in NPK, oils and resins. The biodegradable tubes presented quality indicators of seedlings similar to conventional ones, however, with low mechanical resistance. It is concluded that it is possible to develop tubes through the suggested raw materials (carbonized cashew nut bark and beeswax) that proved viable for the production of biodegradable tubes. The material, in a nursery, was resistant to sun exposure, ambient temperature conditions and daily watering, without the deformation of its structure, offering adequate conditions for the production of seedlings, similar to polypropylene tubes.

5
  • AYANE EMÍLIA DANTAS DOS SANTOS
  • SCIENTOMETRICS, ETHNOBOTANY AND NICHE MODELING OF Amburana cearensis (ALLEMÃO) A.C.SM

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • MARIA FRANCO TRINDADE MEDEIROS
  • FABIO DE ALMEIDA VIEIRA
  • RICHELIEL ALBERT RODRIGUES SILVA
  • Data: 24-feb-2022


  • Resumen Espectáculo
  • Amburana cearensis (Allemão) A.C.Sm is native to the northeastern semi-arid region and popularly known as amburana de cheiro, cumaru, or imburana-de-cheiro. It has considerable economic and medicinal importance. However, it has populations threatened with extinction as a result of predatory extractivism. Thus, this work aimed to carry out a scientometric analysis, conduct an ethnobotanical study on Amburana cearensis; and indicate, through ecological niche modeling, suitable geographic areas for their development in different climate change scenarios. For that, articles were searched in the main databases; the interview technique was used to recognize the biological identity of the species, considering the indication of use coming from traditional knowledge; the maximum entropy algorithm (Maxent) was used in the niche modeling for the optimistic (RCP2.6) and pessimistic (RCP8.5) present and future period, testing two models of general circulation of the atmosphere (GISS-ES-R and CCSM4). It was possible to obtain results regarding the medicinal properties of the species, with a total of 68 articles being identified between the years 2005 and 2020. There was a significant increase in the number of publications during the period evaluated. In addition, it is recorded that the species has been widely used in traditional medicine, which has driven new studies, especially experimental ones focused on unraveling the pharmacological potentials. The data generated from the ethnobotanical interviews allowed a better understanding of the therapeutic characteristics of A. cearensis, with this, it is noted that the rescue of popular knowledge is essential for the development of new scientific proposals. The potential distribution models tested for future climate scenarios (optimistic and pessimistic), centered on 2070, showed that areas of suitability of the present will be maintained in the future. It can also be seen, through the models, that there will be an expansion in the areas of suitability in the states of Ceará and Bahia. Therefore, the data presented in the successive stages of the research provide subsidies to define strategies aimed at the conservation and sustainable management of the species.

6
  • ANA LUIZA DA SILVA LOPES NUNES
  • STRUCTURE AND DYNAMICS OF THE SHRUBBY-ARBOREOUS COMPONENT IN A SEASONALLY DRY TROPICAL FOREST UNDER FOREST MANAGEMENT, IN MACAU, RN

  • Líder : ALAN CAUÊ DE HOLANDA
  • MIEMBROS DE LA BANCA :
  • EMANUEL ARAUJO SILVA
  • RÉGIS VILLANOVA LONGHI
  • ALAN CAUÊ DE HOLANDA
  • JULIANA LORENSI DO CANTO
  • Data: 24-feb-2022


  • Resumen Espectáculo
  • Considering the importance of evaluating the compatibility between the exploitation system usually used in the Caatinga and the vegetation regeneration process, identifying the growth dynamics and investigating the loss of floristic diversity, this study aims to characterize the adult and regenerative shrub-tree component, in four stands with ages of 9-, 12-, 16-, 20- and 26-years post-exploitation, submitted to clear and selective cutting regimes. For the adult component, individuals with CAP ≥ 6 cm and total height greater than 1.0 m were measured, in permanent plots of 20 x 20 m, and subplots of 5 x 5 m were used to evaluate the regenerative stratum, measuring the individuals with total height greater than 0.5 m and CAP < 6.0 cm. Data analysis was performed by estimating phytosociological parameters (absolute and relative), such as: frequency, density and dominance, as well as the importance value index, diversity index, basal area and volumetry. Ten species were inventoried, distributed in four families, among them, the following stand out: Croton blanchetianus, Pityrocarpa moniliformis, Cenostigma pyramidale and Piptadenia retusa, due to their high density. Data analysis made it possible to observe a distinction between treatments, especially in the structural parameters of density (CS3 – 1,867 ind ha-1; CS1 – 1,742 ind ha-1; CS2 – 1,575 ind ha-1; CR – 1,550 ind ha-1), dominance (CS3 – 5.05 m² ha-1; CS2 – 4.51 m² ha-1; CR – 4.17 m² ha-1; CS1 – 3.45 m² ha-1), vertical stratification and forest dynamics. Management systems CS2 and CS3 stood out in relation to CR and CS1 in terms of the recovery of the original stock in basal area and volume, presenting values higher than those of 1995 and indicating that the initial data did not correspond to the maximum potential for woody biomass. The forest dynamics of the evaluated area points to the insufficiency of the 15-year cutting cycle, common in PMFS in Rio Grande do Norte, regarding the recovery of forest composition and structure in this region.

7
  • MARCELA CRISTINA PEREIRA DOS SANTOS ALMEIDA
  • Energy valorization of suppressed species in the implementation of a wind energy project
  • Líder : RENATA MARTINS BRAGA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • JANDUIR EGITO DA SILVA
  • RENATA MARTINS BRAGA
  • Data: 24-feb-2022


  • Resumen Espectáculo

  • The need to diversify the Brazilian energy matrix, due to water scarcity and the need for low carbon energy sources, has awakened research in the search for renewable alternatives for energy generation. In view of the growing wind potential, mainly in the Northeast region and in the state of Rio Grande do Norte, there is a considerable growth of plant suppression, due to the installation of wind farms. The present work seeks to present alternatives for energy recovery of the species suppressed during the installation of a wind farm in the region of Mato Grande, through energy characterization and analytical rapid pyrolysis. The data that supported the work were provided by an environmental consulting company from the state of Rio Grande do Sul, and for the energetic characterization of the residues produced during the suppression of native species of the caatinga, immediate analysis, calorific value, apparent density, thermogravimetric analysis and cellulose composition were carried out, hemicellulose and lignin. Analytical fast pyrolysis was developed at 500 °C in a CDS Analytical HP-R 5200 pyrolyser coupled to a gas chromatograph to identify the pyrolysis products. The calorific value of pear, imburana and catingueira were 18.39 MJ/kg-1, 17.99 MJ/kg-1 and 17.47 MJ/kg-1, respectively, depending on their energy potential. The pyrolysis results show the presence of several oxygenated compounds characteristic of the decomposition of lignocellulosic materials, such as phenols, ketones and light oxygenated compounds, containing between 1-4 carbon atoms, which comprise carboxylic acids. The materials have a high calorific value and can be applied for direct combustion, such as in the manufacture of briquettes and pellets. While the pyrolysis results reveal the potential for obtaining renewable chemicals as an attractive product for several areas of industry, the paint, phenolic resin and pesticide industries. And because it has a considerable amount of oxygenated compounds in its composition, as is the case of the classes of ketones and phenols, it reveals its potential for the use of pyrolysis products in the chemical industry, as well as the direct application of these biomasses in thermochemical processes of conversion of energy.

8
  • STHEFFANY CAROLINA DA SILVA LÓZ
  • FLORA OF RIO GRANDE DO NORTE: ARACEAE

  • Líder : LEONARDO DE MELO VERSIEUX
  • MIEMBROS DE LA BANCA :
  • ALICE DE MORAES CALVENTE
  • LEANDRO DE OLIVEIRA FURTADO DE SOUSA
  • LEONARDO DE MELO VERSIEUX
  • Data: 28-feb-2022


  • Resumen Espectáculo
  • Araceae belongs to the group of angiosperms, monocotyledons, Alismatales order, and is represented by 144 genera and about 3.645 species. It is distributed throughout the Brazilian territory, totaling 47 genera and 519 species in the different biomes. However, studies point to gaps in the knowledge of species not yet recorded or identified in neotropical regions, such as the Northeastern Brazil, including the state of Rio Grande do Norte (RN). Rio Grande do Norte Flora is partially known and still lacking a taxonomic treatment and studies on uses and potentials for Araceae, which is recognized by presenting species of economic and ecological interest, used in horticulture, food, and with medicinal applications. Thus, the objective of this work is to describe the Araceae of Rio Grande do Norte, as well as to analyze the diversity of the family, its ornamental potential and expand the information on its distribution and conservation. Data collection for the study took place through consultations of specimens deposited at the UFRN, RN and MOSS collections, in addition to consultations via online platforms. Twenty-two species distributed in twelve genera were recorded. The genera with the highest number of representatives were: Anthurium (4 spp. or 18%), Philodendron (4 spp. or 18%), followed by Lemna (3 spp. or 14%), Montrichardia and Taccarum (2 spp. or 9% each). The other genera are represented by one species each. Eleven new occurrences (50% of the total) were recorded for the flora of the state, of which two (~10%) belong to genera Colocasia e Monstera being recorded for the first time. This work presents photographic plates, identification keys, taxonomic comments, geographic distribution of genera and species, distributional maps and descriptions of each species.

9
  • FRANCISCA ADRIANA FERREIRA DE ANDRADE
  • Prediction of seed germination of Pityrocarpa moniliformis (Benth.) Luckow & RW Jobson using Deep Learning

  • Líder : MARCIO DIAS PEREIRA
  • MIEMBROS DE LA BANCA :
  • LARECIO JUNIO DA SILVA
  • LAURA EMMANUELLA ALVES DOS SANTOS SANTANA DE OLIVEIRA
  • MARCIO DIAS PEREIRA
  • RAQUEL MARIA DE OLIVEIRA PIRES
  • Data: 03-mar-2022


  • Resumen Espectáculo
  • The possibility of predicting the germination of a seed lot through the use of Deep Learning has shown potential as a complementary method to the analysis of seed quality. This research evaluated the efficiency of using Deep Learning, with convolutional neural networks, to predict the germination of Pityrocarpa moniliformis (Benth.) Luckow & R. W. Jobson seeds. 1000 seeds were randomly selected from 4 different lots, 250 seeds for each, which were used in germination tests and computational analysis. A scanner was used to capture the images of the seeds, from which the images of each seed were obtained individually. The seed images were used to implement, train and test the convolutional neural networks in the computational algorithm created in this research, aiming at comparing the results obtained from the computational analysis with those of the individual germination of each seed. Therefore, after acquiring the images, the seeds were placed to germinate, identifying each one of the seeds. After the germination period, the seeds were divided into two classes, germinated (0) and non-germinated (1). From the images of the seeds before germination, and with the individual result of each seed, the computational analysis was carried out. The pre-trained networks after 5 epochs of execution indicated a tendency to improve accuracy, however, there were also signs of overfitting, since the performance in the training data was better than the validation data (test). The recall (sensitivity) was greater than 90% in all models for the class of germinated seeds. The recall value was much lower for the non-germinated class, both below 20%. For the customized model, 85% of recall was obtained for the class of non-germinated seeds and 18% for the germinated ones, which may have occurred due to an overlap or inversion in the recognition of the classes. The results of the pre-trained networks and the customized model proved to be promising, both for the training set and the test set, since it is possible to verify the efficiency of the use of Deep Learning in predicting the germination of Pityrocarpa moniliformis seeds, however, the analyzes indicate the need to improve and adjust the pre-processing of the images and require more investigation time and more tests to configure the models.

10
  • MARIA KELY ALVES GOMES DA SILVA
  • ENERGY POTENTIAL OF WOOD FROM Eucalyptus CLONES IMPLANTED IN THE NEOTROPICAL SEMI-ARIDITY OF BRAZIL AND THEIR TECHNICAL PERFORMANCE AS A BIOFUEL

  • Líder : ROSIMEIRE CAVALCANTE DOS SANTOS
  • MIEMBROS DE LA BANCA :
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • GUALTER GUENTHER COSTA DA SILVA
  • João Gabriel Missia da Silva
  • Data: 01-jun-2022


  • Resumen Espectáculo
  • The objective of this work was to investigate the bioenergetic potential of Eucalyptus wood under different density conditions and its technical performance as a fuel in the burning process of red ceramic products. Initially, five eucalyptus clones were selected in 06 different spacings (3 x 0.25; 3 x 0.5; 3 x 1.5; 3 x 3; 3 x 5 and 3 x 6.5), totaling 30 response variables. . The mortality of individuals was counted based on the database recorded in the inventories that took place every six months (2013 - 2019) and later, extrapolated by the planting density (ind.ha-1) to estimate the survival rate and volumetric production. Three sample trees were felled from each treatment and sent to determine the basic density, higher calorific value, ash content, volatile materials and fixed carbon and based on the data obtained, the stored energy per cubic meter (m3) and hectare was estimated. (there is). The material A1 was selected, due to its wide commercialization, for the firing process in a red ceramic industry, using the species Prosopis juliflora as a comparative factor. That said, for the technical evaluation in the burning, three treatments were adopted, with four replications: T1 - 100% P. juliflora, T2 - 100% Eucalyptus sp. and T3 - 50% of P. juliflora and E. sp. The wood used was previously organized in piles in the yard and its dimensions were measured to obtain its volume in stereo (st) and its solid volume was determined from the stacking factor promoted by a template (1m2) at the center of each pile. For each repetition, the number of times the oven was filled with firewood was recorded, the interval between supplies and, at the end of the firing, the percentage of first quality pieces, raw and broken. It was concluded that in situations where the planting was more dense, there were higher percentages of mortality. Higher wood basic density was found for clone R9 at 6.5 spacing and, in general, there was a positive correlation between the increase in wood basic density and wide spacings. The stored energy was superior in treatments with high population density that presented low mortality rates. Considering the final use of wood as an energy source, the C3 genetic material in the 3 x 0.25m spacing resulted in the highest bioenergetic potential of wood (1,010,310 kcal/ha) due to the high survival rate in a reduced spacing. . For the burning process, the average consumption of wood was higher in T1 (5.27 m3), followed by T3 (4.70 m3) and T2 (2.90 m3). Overall, in both treatments, the first quality pieces were above 90% (94.05%, 92.49% and 96.64%), followed by a low percentage of raw pieces (5.57%, 7 .07% and 3.06%) and broken parts (0.38%, 0.44% and 0.29%). The values found for raw pieces can be related to the temperature drops below 900°C, which occurred during the firing process, called “attention points”. It is concluded that there are no significant differences in the quality of the pieces, however there is a reduction in wood consumption of 10.82% in treatment T3 and of 44.93% in treatment T2 in relation to T1.

2021
Disertaciones
1
  • EDSON BRUNO DO NASCIMENTO
  • NON-STRUCTURAL CARBOHYDRATE PARTITIONING IN Erythrina velutina Willd. DURING SEED GERMINATION AND SEEDLING ESTABLISHMENT

  • Líder : EDUARDO LUIZ VOIGT
  • MIEMBROS DE LA BANCA :
  • EDUARDO LUIZ VOIGT
  • JULIANA ROCHA VAEZ
  • MAURO VASCONCELOS PACHECO
  • Data: 26-feb-2021


  • Resumen Espectáculo
  • Seed germination and seedling establishment are critical processes for plant communities, as high mortality takes place at these initial steps of the plant life cycle due to the exposure to biotic and abiotic stresses.  Taking into account the central role of carbon metabolism in the heterotrophy-autotrophy transition, closely related to survivorship, this work aims to investigate the partitioning of non-structural carbohydrates in the different organs of Erythrina velutinaWilld., a pioneer species from the Caatinga, during seed germination and seedling establishment. Seeds from ten mother trees were scarified, disinfected, soaked in distilled water, sown in rolls of Germitest® paper and kept under controlled conditions for 9 days. Then, the seedlings were transferred to hydroponics in distilled water and grown in a greenhouse for 12 days. The collections were carried out at discrete physiological stages, including imbibed seed, radicle protrusion, hypocotyl emergence, plumular hook opening, and emergence of cordiform leaves, first trifoliolate leaf and second trifoliolate leaf. The seedlings were divided into cotyledons and other parts, according to their appearance during the different stages.  Ao longo do estabelecimento, houve diminuição progressiva de massa seca nos cotilédones, sendo transferida para os órgãos dreno, especialmente a parte aérea, segundo o decréscimo da relação raiz/parte área ao longo do experimento. Total soluble sugars, non-reducing sugars and starch were accumulated in the root and hypocotyl during the initial stages and the content of these compounds increased in the leaves at the late stages of establishment. Amylase activity was higher in the shoot than in the root in the course of the experiment. These results show that E. velutina massively utilized non-structural carbohydrates to axis growth at early establishment and these compounds may have been accumulated in the leaves at late establishment as a result of photosynthetic activity.

2
  • FRANCISCO EUDES DA SILVA
  • MORPHO-PHYSIOLOGICAL CHARACTERIZATION OF THE GERMINATION Senna siamea (Lam.) SEEDS IN DIFFERENT SUBSTRATES AND TEMPERATURES

  • Líder : MARCIO DIAS PEREIRA
  • MIEMBROS DE LA BANCA :
  • CHARLINE ZARATIN ALVES
  • MARCIO DIAS PEREIRA
  • SIDNEY CARLOS PRAXEDES
  • Data: 27-feb-2021


  • Resumen Espectáculo
  • Determining adequate procedures for conducting the germination test in forest species is important to enable the commercialization of seed lots, especially for those that are not included in the Normative Instructions. Therefore, the objective was to determine the ideal temperature and substrate conditions for the Senna siamea seed germination test, as well as to characterize the morphophysiology of the seedling establishment during the germination process and the period for seedling evaluation, in order differentiation of Senna siamea seed lots. Initially, the experiment was carried out in a 2 x 2 arrangement (substrates x temperature), using the substrates paper roll and on sand, and at 25 and 30 ° C installations. For the comparison of the seed lots, we used if the arrangement of 10 x 1 (lots x experimental condition). The percentage and speed of germination, first count, seedling length, accumulated germination, seedling morphology during germination and accelerated aging are recorded. Senna siamea seeds have a higher germinative potential in a paper roll substrate at temperatures of 25 and 30 ° C. The first germination count and a final seedling evaluation must be done at 10 and 21 days after sowing, respectively. The species has germination of epigeal type seeds and its seedlings are phanerocotyledonous. Lots being 3; 4; 6 and 9 with greater viability potential for the commercialization of seed lots and for the production of seedlings.

3
  • JÉSSICA MAIA ALVES PIMENTA
  • HOW TO SELECT Handroanthus impetiginosus (Mart. ex. DC.) TREES TO SUBSIDY SEEDS COLLECTION AREAS IN CAATINGA?

  • Líder : MAURO VASCONCELOS PACHECO
  • MIEMBROS DE LA BANCA :
  • MAURO VASCONCELOS PACHECO
  • DAGMA KRATZ
  • FERNANDO DOS SANTOS ARAÚJO
  • RICARDO GALLO
  • Data: 30-jun-2021


  • Resumen Espectáculo
  • Handroanthus impetiginosus (Mart. ex DC.) Mattos (Bignoniaceae) is a tree species with wide geographic distribution, with high ecological and economic potential in the regions where it occurs, being heavily exploited in illegal trade. Thus, efforts are needed to preserve natural populations. Therefore, there is an evident need for the selection of mother trees to produce seeds of high genetic and physiological quality for the conservation of the species. The objective of this study was to define criteria for the selection of mother trees, based on the genetic diversity of individuals and the physiological quality of the seeds, to provide subsidies for the installation of Seeds Collection Areas with Selected Mother Trees of H. impetiginosus. The work was divided into 2 steps, first 30 Inter Simple Sequence Repeat (ISSR) molecular primers were tested, eight of which were selected because they presented the best amplification pattern and provided 64 loci, 98% being polymorphic. The ISSR primers proved to be efficient, the Nei genetic diversity was 0.35, the Shannon index was 0.52, allowing the identification of an intermediate intrapopulation similarity degree in the sampled population. Subsequently, the physiological quality was evaluated through germination and seed vigour tests of 63 trees. Of this total, 45 individuals can be considered suitable for seed production, because they produced high and intermediate physiological quality seeds. Therefore, through the genetic distance of Nei < 0.72 and individuals with germination greater than 50% is possible to select of H. impetiginosus mother trees to install Seeds Collection Areas with Selected Mother Trees.

4
  • BRUNA FERREIRA DOS ANJOS
  • QUANTIFICATION AND APPLICATION OF TANINS PRESENT IN THE BARK OF CAATINGA ARBOREA SPECIES IN WATER TREATMENT

  • Líder : TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • PEDRO NICÓ DE MEDEIROS NETO
  • RAFAEL RODOLFO DE MELO
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • Data: 30-jun-2021


  • Resumen Espectáculo
  • Tannins are polyphenols present in various groups of plants and are found in almost all parts of plants, have a physiological function of protection against herbivores and diseases, which can be characterized as hydrolyzable or condensed. Vegetable tannins are of relevant economic, ecological and social importance in the country's non-timber forest sector, sparking numerous studies in search of new species that produce tannins. This research aims to quantify the condensed tannins extracted from the bark of two forest species: Mimosa tenuiflora Willd and Mimosa caesalpiniifolia Benth and evaluate its potential as a coagulant for water treatment. The barks were collected from five trees that had appropriate phytosanitary characteristics for each species, obtained from a six-year-old forest plantation, grown for timber purposes. Located in the Experimental Area of the Academic Unit Specialized in Agricultural Sciences (UAECIA) of the Agricultural School of Jundiaí (EAJ), municipality of Macaíba-RN. Total solids content (TST), Stiasny index (I) and condensed tannin content (TTC) were determined. The species M. tenuiflora obtained higher percentages in all parameters TST, I and TTC (27.60%, 74.82% and 20.65% respectively), indicating potential for large-scale tannin production, although the M. caesalpiniifolia has presented lower TTC, TST values in I, the value was similar to that of black jurema with (71.43%), characterizing a high degree of pure tannins, requiring further research, such as chemical characterization for identification possible new uses for this species.

5
  • JÉSSICA SABRINA OVÍDIO DE ARAÚJO
  • Selection of mother trees for formation of Amburana cearensis (ALLEMÃO) A.C.SM. seeds orchad


  • Líder : MAURO VASCONCELOS PACHECO
  • MIEMBROS DE LA BANCA :
  • MAURO VASCONCELOS PACHECO
  • GIVANILDO ZILDO DA SILVA
  • CIBELE DOS SANTOS FERRARI
  • Data: 31-ago-2021


  • Resumen Espectáculo
  • Amburana cearensis (Allemão) A.C.Sm. (Fabaceae) is a native species of the endangered Caatinga. Thus, studying the remaining natural populations is imperative to assist in their conservation. Thus, it aimed to characterize natural populations of A. cearensis to support in situ conservation strategies and seed collection of this species in the Caatinga biome. Three populations were selected for the study, one in the state of Paraíba (Soledade) and two in Rio Grande do Norte (Caicó and Assu). The quality of the seeds produced by the trees of the population of Soledade were analyzed with the perspective of selecting matrix trees for seed collection and the three populations were genetically characterized to support in situ conservation strategies and seed collection. A total of 17 trees (100%) of the population of Soledade presented potential for seed production, as they presented satisfactory values for physiological quality. By analyzing the amplification profile of 30 ISSR (Inter Simple Sequence Repeat) molecular primers, it was found that only twelve of them revealed loci with good resolution, reproducible and with high polymorphism (83-100%). This set of primers revealed 89 loci with 98.8% polymorphism, this amount being sufficient to detect genetic polymorphism based on the resampling technique. The evaluated genetic diversity indices were polymorphism percentage (%PL), polymorphic information content value (PIC), Nei genetic diversity index (He), Shannon index (I), total heterozygosity (Ht), genetic differentiation (GST) and gene flow. Informative and satisfactory values were found for genetic diversity indices for trees in the Caicó population (%PL = 69.3; He = 0.152; I =0.232), Soledade (%PL = 80.8; He = 0.225; I = 0.338) and Assú (%PL = 73.7; He = 0.240; I = 0.350). However, for Nei genetic diversity (He = 0.364), Shannon Index (I = 0.539) Total heterozygosity (Ht = 0.371), genetic differentiation (GST = 0.447), only among populations these values were moderately satisfactory. Gene flow was low (Nm = 0.620), indicating isolation or fragmentation of populations. For morphometric characterization of Caicó, Soledade and Assu, there was a significant difference only for height, in which taller tree classes were observed, indicating advanced ontogenetic stage of the trees. Therefore, from the results obtained, it was possible to characterize all populations of A. cearensis as potential seed producers and satisfactory genetic diversity for seed collection and in situ conservation of the species.

2020
Disertaciones
1
  • AGEU DA SILVA MONTEIRO FREIRE
  • BIOMASS AND TANANT EXTRACTS ANALYSIS OF Protium heptaphyllum (Aubl.) March, A SPECIES WITH MEDICAL PROPERTIES

  • Líder : RENATA MARTINS BRAGA
  • MIEMBROS DE LA BANCA :
  • RENATA MARTINS BRAGA
  • ELANIA MARIA FERNANDES SILVA
  • FLÁVIA DE MEDEIROS AQUINO
  • Data: 23-ene-2020


  • Resumen Espectáculo
  • Protium heptaphyllum (AUBL.) March is a native species of Brazil with medicinal properties and pharmacological potential, and vegetable tannins are secondary compounds that act in the treatment of different diseases. The objective of this work was to evaluate the characteristics and composition of the bark, leaf and fruit of the species, as well as the number of tannins in each structure. The content of moisture, ash content, volatile content and fixed carbon, as well the amount of crude protein, hemicellulose, lignin and cellulose were determined. Afterwards, extracts were obtained, evaluating in the samples the amount of total solid, Stiasny Index, condensed tannins and not tannins. Thermogravimetric analysis and Fourier transform infrared spectroscopy of the biomass and tanning extracts were also performed. The bark presented higher moisture content and ashes. The leaf was the structure that obtained higher amount of volatiles and the fruit a higher fixed carbon content. The leaf is the structure that has more crude protein and hemicellulose, and the lignin content was higher in the bark. The amount of cellulose is statistically the same for the three structures. The fruit contains a more significant amount of total solids, condensed tannins and no tannins, since the bark and leaf are structures that also have greater value in the Stiasny Index. The extracts showed different weight loss than biomass, and above 900 °C, the fruit has different thermal characteristics of the bark and leaf. Spectroscopy shows that the biomass and extracts of the three structures are similar.

2
  • TALVANIS CLOVIS SANTOS DE MELO
  • THE ENERGETIC CHARACTERIZATION OF RESIDUE LIGNOCELLULOSIC OF Bixa orellana L. FOR FAST PYROLYSIS PROCESS

  • Líder : RENATA MARTINS BRAGA
  • MIEMBROS DE LA BANCA :
  • RENATA MARTINS BRAGA
  • ELANIA MARIA FERNANDES SILVA
  • JOANA MARIA DE FARIAS BARROS
  • Data: 24-ene-2020


  • Resumen Espectáculo
  • Energy is an essential factor for economic and social development. Increasing demand for energy has become a challenge to large production and consumption centers, as well as causing environmental problems, in this sense, their generation from renewable sources such as biomass is one of the most promising alternatives, and specifically residual biomass resulting from agroforestry activities has greater potential for exploitation. Brazil is the world's largest producer of annatto, accounting for more than 50% of the world's production, and in the processing of Bixa orellana fruits for the extraction of dye pigments such as bixin, large amounts of residues are produced without definite application. In this context the objective of the work will be the energetic characterization of the residues of the annatto processing. The analysis will be done from samples collected in a planting located in the city of Bonito / PE. Biomass was characterized by physicochemical characterization by Immediate Analysis (volatile content, moisture, fixed carbon and ash), Elemental Analysis, Compositional Analysis, Thermogravimetric Analysis, FT-IR and Calorific Power. The results show that the biomass has a satisfactory calorific value (15.04 MJ / Kg), low moisture content (9.71%), high percentage of volatile material (78.50%), and high content of lignin (32.15%) thus showing great potential for the energy use of this type of biomass.

3
  • MAILA JANAÍNA COÊLHO DE SOUZA
  • USE OF COCONUT FIBER IN MANUCTURED RECONSTITUTED PANELS

  • Líder : RAFAEL RODOLFO DE MELO
  • MIEMBROS DE LA BANCA :
  • RAFAEL RODOLFO DE MELO
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • JOSÉ BENEDITO GUIMARÃES JUNIOR
  • RICARDO HENRIQUE DE LIMA LEITE
  • Data: 24-ene-2020


  • Resumen Espectáculo
  • The demand for timber products grows annually in Brazil and this fact causes scarcity of forest resources. Therefore, the timber sector seeks alternatives to maintain production and meet the demand for these products. The one of these alternatives is the production of agglomerated panels with lignocellulosic residues. The several studies have been carried out involving  the incorporation of agro-industrial waste in the manufacture of reconstituted panels, such as, the coconut fiber, sugarcane bagasse, rice hulls, coffee husks, among others, for the production of panels. In this context, the objective was to evaluate the physical and mechanical properties of cement panels composed by different proportions of Eucalyptus urograndis wood and coconut fiber, with Portland cement CPV-ARI as the binder. We realized six treatments, which was coconut fiber added in 10, 20, 30, 40 and 50%, besides to the control without addition of coconut fiber (0%). In addition, we used the chemical additive to cancel another treatment in the raw materials to make panels. Due to, previous studies have displayed that chemical treatments on wood particles and coconut fiber were not able to cause significant differences to occur for both physical and mechanical properties. The panels were analyzed for physical properties, which were specific mass, water absorption in 2 and 24 h and swelling in thickness in 2 and 24 h of immersion. We will also submit the panel to the mechanical tests, as static bending, internal bonding and compression. Finally, with the already obtained data we could observe that the physical analyzes were satisfactory, with the panels produced in 50% of coconut fiber can be used for internal use.

4
  • JOAQUIM CUSTÓDIO COUTINHO
  • CURRENT FLORISTIC KNOWLEDGE AND EARTH USE ASSESSMENT IN EPA BONFIM-GUARAÍRAS, RIO GRANDE DO NORTE

  • Líder : LEONARDO DE MELO VERSIEUX
  • MIEMBROS DE LA BANCA :
  • JESUS RODRIGUES LEMOS
  • MARIA BEATRIZ ROSSI CARUZ
  • ALICE DE MORAES CALVENTE
  • LEONARDO DE MELO VERSIEUX
  • Data: 29-ene-2020


  • Resumen Espectáculo
  • The Atlantic Forest biome has suffered in recent years with degradation, due to the increase of anthropic activities, which lead to the main problems of forest remnants, which are the fragmentation, hindering the floristic studies and conservation itself. This thesis aims to associate spatial data, using the Geographic Information System (GIS), with floristic data within the Atlantic Forest of Rio Grande do Norte (RN). The study area selected is the Bonfim-Guaraíras Environmental Protection Area (EPA), included in the eastern portion of the RN within the Atlantic Forest domain. We assessed the levels of sampling effort, percentages of remaining forests, and indicated the priority areas for research and conservation within the EPA. We created a georeferenced database of the angiosperm records from some herbariums as ASE, CESJ, HUCS, HUEFS, JPB, JBRJ and UFRN that are available in online platforms (JABOT and SpeciesLink) totaling 2029 records. The first step of this work was performed with the data cleaning to the collected records. After the data cleaning, we had a reduction in the total number of records to 966. The most expressive results of this step are available in chapter 1 of this dissertation. A checklist was created  for all the species present at EPA Bonfim-Guaraíra with the georeferenced database. In the checklist are listed 387 species distributed across 269 genera and 86 families. The most abundant family was the Fabaceae of the Rosideae clade with about 51 registered species. In contrast, the genus with the largest records was Cyperus of the Cyperaceae family. Only one species was identified as endemic to the EPA - Eugenia pipensis, and only two with a vulnerable status on the threatened lists: Melocactus violaceus and Cyperus articulatus. It was confirmed that the two municipalities Nisia Floresta and Tibau do Sul are the most abundant in species, which indicates there is a need for collection in other municipalities of ABG, to better know their flora and the situation for their species. Collection bias is also discussed.

5
  • AMANDA BRITO DA SILVA
  • URBAN FORESTS: CHARACTERIZATION AND METHODS OF QUANTIFICATION OF URBAN AFFORESTATION

  • Líder : LEONARDO DE MELO VERSIEUX
  • MIEMBROS DE LA BANCA :
  • ALICE DE MORAES CALVENTE
  • DEMÓSTENES FERREIRA DA SILVA FILHO
  • JESUS RODRIGUES LEMOS
  • LEONARDO DE MELO VERSIEUX
  • Data: 30-ene-2020


  • Resumen Espectáculo
  • Trees play an important role in improving the environmental and living quality of urban populations by their ecological, economic, aesthetic and recreational functions. These functions are affect thermal comfort, the balance of the hydrological cycle, the mitigation of noise, visual and air pollution, the breakdown of the artificiality of the urban environment, among others benefits. In this context, this thesis aims to characterize the afforestation of urban areas in the cities of the State of Rio Grande do Norte (RN) and to test methods for quantification of green areas. We will use to characterize the urban afforestation the correlation of metadata from all cities of the RN from the IBGE’s statistics census. In addition, we will do the correlation and comparison of the socioeconomic data, such as violence statistics from Secretariat of Security of the state of Rio Grande, due to several surveys indicating a clear relationship between lower rates of green areas and higher rates of disease, including depression, and violence. For the statistical tests it was necessary to check the behavior of all the data regarding its normality, using the analysis of the main components, then the data that presented normality were separated and the covariance matrices and factorial analysis were done, all in the Core R Team (2018). Soon after data analysis, two municipalities were chosen (high homicide rate per 100,000 inhabitants and low afforestation of public roads; low homicide rate per 100,000 inhabitants and high afforestation of public roads) in each mesoregion of the state of RN. We compared the geoprocessing of images with the afforestation census data. Our partial results indicate a correlation for the variables: afforestation of public roads, hospitalizations for diarrhea at the East, Agreste, Central and West Potiguar regions of the State of RN. Moreover, the Central, West and East Potiguar regions presented an inversely proportional rate of homicide and afforestation rates of public roads. That is, the greater the afforestation of public roads in these regions the lower the homicide rates. And the municipalities that had a higher homicide rate had less afforestation of public roads for the Central, West and East Potiguar regions were Currais Novos, Caraúbas and São Gonçalo do Amarante, are placed, respectively.

6
  • EMANOELLE JOSEPHINE PEREIRA DA COSTA

  • CHANGES IN THE VEGETATION STRUCTURE IN A CAATINGA AREA BETWEEN 2015 AND 2019
  • Líder : ALAN CAUÊ DE HOLANDA
  • MIEMBROS DE LA BANCA :
  • ALAN CAUÊ DE HOLANDA
  • JULIANA LORENSI DO CANTO
  • ALLYSON ROCHA ALVES
  • Data: 30-ene-2020


  • Resumen Espectáculo
  • Studies on the composition and structure of the caatinga are important for the characterization of the different faces, constituting a tool to understand aspects of regional ecology, providing bases for its conservation. The objective of this work was to characterize the floristic composition and structure of a Caatinga area between 2015 and 2019. The experiment was installed in Açú National Forest, RN. In 2015, 20 sample units of 400 m2 were implanted and all woody individuals with girth at breast height ≥ 6 cm were measured. In 2019 partial replacement of some plots occurred and all woody individuals with CAP ≥ 6 cm were measured. Between the respective years the floristic and phytosociological data were analyzed. In 2015, 2,408 individuals were inventoried, distributed in 15 families and 23 species. In 2019, 2,271 individuals were sampled, distributed in 16 families and 34 species. The species with the highest DoA were C. pyramidale (4,575 and 5,503 m2ha-1) and H. impetiginosus (2,093 and 1,621 m2ha-1) for both years. The basal area in 2015 (8.68 m²ha-1) was lower than that calculated for 2019 (9.05 m²ha-1), and the diversity index (H ') was 2.19 and 2.34 nats.ind-1 for 2015 and 2019, respectively. The diameter distribution concentrated in the first class a total of 1,936 (2015) and 1,767 individuals (2019). The volumetric increment was 4.85 m3ha-1, that is, 1.21 m3ha-1year-1. Conserved areas are prone to robust successional advances compared to disturbed areas.

7
  • YASMIM BORGES CÂMARA
  • SUFFERING, ACCUMULATION AND DECOMPOSITION OF SCRAP IN THREE ATLANTIC FOREST FRAGMENTS WITH DIFFERENT REGENERATION STAGES
  • Líder : ALAN CAUÊ DE HOLANDA
  • MIEMBROS DE LA BANCA :
  • ALAN CAUÊ DE HOLANDA
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • ALLYSON ROCHA ALVES
  • Data: 30-ene-2020


  • Resumen Espectáculo
  • The litter is the most superficial layer of the forest floor and, analyzing its deposition is fundamental to evaluate the stability of the forests.  The objective of this work was to evaluate the litter input on the edge of three forest fragments with different use histories.  The fragments are located in Nisia Floresta FLONA, being classified in F1, F2 and F3.  54 collectors were installed (collector area: 0.159 m²), 18 in each area, spaced from 0 to 100 in relation to the border and, monthly, for 12 months, all the deposited material was collected.  The estimated litter deposition was 3,227.90 kg ha-1 year, 3,315.60 kg ha-1 year and 1,775.90 kg ha-1 year, respectively, for fragments F1, F2 and F3, during the one year.  collect.  The largest contribution in F2 was due to the location of the fragment, which is located in the area of greater floristic diversity of Flona, composed mostly of adult individuals.  The litter input had seasonal behavior, presenting greater deposition in the adverse period, indicating that rainfall acts as a regulator of this material.  About the contribution of litter from the edge to the interior of the fragments, only in F3 there were statistical differences with values between 93.87 kg ha year and 261.7 kg ha year (100 m).  Fragments with high disturbance histories deposit less litter from the edge to the interior of the forest, claiming that this is the most degraded fragment.

8
  • ANA CLARA CABRAL DAVI
  • ESEC SERIDÓ e-FLORA: UNDERSTANDING USES AND POTENTIAL OF NATIVE TREES

  • Líder : ALICE DE MORAES CALVENTE
  • MIEMBROS DE LA BANCA :
  • ALICE DE MORAES CALVENTE
  • LEONARDO DE MELO VERSIEUX
  • PAULO SERGIO MARINHO LUCIO
  • RAMIRO GUSTAVO VALERA CAMACHO
  • Data: 31-ene-2020


  • Resumen Espectáculo
  • The flora of the Caatinga biome is still poorly known and surveyed. Studies combining floristic surveys and bioinformatic tools in conservation priority areas such as the Seridó ecological station reserve - ESEC Seridó, can contribute significantly to the use of native species. This study aims is to elaborate a checklist of all tree species in ESEC Seridó and compile informations about their uses. With this data, we aim to build an e-Flora of arboreous species and its applications, including an interactive key for all species treated in the e-flora. Listing the species based on database and field collections and elaborate the interactive key using the XPER program. We expect to document the potential uses of studied native flora, highlighting the biodiversity of the caatinga biome to the scientific and general community.

9
  • JOÃO HENRIQUE DO NASCIMENTO NETO

  • USE OF THE BDq METHOD IN A CAATINGA AREA SUBMITTED TO FOREST MANAGEMENT

  • Líder : ALAN CAUÊ DE HOLANDA
  • MIEMBROS DE LA BANCA :
  • ALAN CAUÊ DE HOLANDA
  • JULIANA LORENSI DO CANTO
  • ALLYSON ROCHA ALVES
  • Data: 31-ene-2020


  • Resumen Espectáculo
  • The BDq method is based on the concept of balanced forest and its application as determination of selective logging leads the population to a remaining stock promoting the maintenance of the diameter structure. The work aimed to apply the BDq method in an area subjected to Forest Management. Through 20 m x 20 m sample plots, a forest inventory was carried out in an area of 4,400 m2. Three management alternatives based on the BDq method were proposed, with 40% (T1), 50% (T2) and 60% (T3) stem reduction. 1,680 woody individuals were inventoried in 10 families, 18 species and 16 genera. In T1, with a reduction of 40% of the total basal area (8.40 m2ha-1) there is an estimated harvest of 1,873 stems, being more representative in the center of the diameter class 2.45 cm (1126 stems). The estimated harvest volume was 39.42 m3ha-1. At 50%, it allowed a permanence of 39.76% of the stems and an estimated harvest of 60.23% of the individuals, representing a total of 1,012 stems. The estimated harvest volume was 39.65 m3ha-1. In T3, with a reduction of 60%, it allowed a permanence of 37.50% of the stems and a harvest estimate of 62.50%, representing a total of 1,050 stems between the classes. The estimated harvest volume was 40.61 m3ha-1. Taking into account the dynamics, ecological succession and commercial exploitation, it was observed that the combination that showed the most effective results was that of management Scenario 1, due to the high number of individuals able to silvicultural activities, thus ensuring the ecological succession, of the area and subsequently its dynamics.

10
  • FABIANA SILVA DE ARAÚJO
  • GENE EXPRESSION OF EUCALYPTUS THIOREDOXIN GENES IN RESPONSE TO SALT STRESS

  • Líder : PAULO SERGIO MARINHO LUCIO
  • MIEMBROS DE LA BANCA :
  • ALEK SANDRO DUTRA
  • CARLOS ALFREDO GALINDO BLAHA
  • PAULO SERGIO MARINHO LUCIO
  • Data: 31-ene-2020


  • Resumen Espectáculo
  • Eucalyptus grandis is the first eucalyptus species that had its genome fully sequenced and published in 2014. The plant is of great economic interest for Brazil that currently has a planted area of 7.84 million hectares for pulp production. The species also remains the target of breeding studies through hybridization and genetic transformation for the production of some transgenic plants already released for experimental planting. The objective of this work is to progress in the functional characterization of genes coding for thioredoxin h in E. grandis. Specifically, we intend to study the gene expression product of 3 of these genes in a salt stress response condition in seedlings and in adult individuals maintained in experimental planting. The methodology used to obtain seedlings consists of subjecting pelletized seeds to plates containing moistened filter paper in three treatments, control, 50mM and 100mM NaCl. Adult plants are specimens of the TECHS (Tolerance of Clonal Eucalyptus to Hydric, Thermal and Biotic Stresses) experiments. RT-PCR assays are performed from extractions of total RNA from seedlings submitted to stresses and from adult plants of the TECHS. CDNA libraries are obtained from the total RNA extracted and PCR reactions with the oligonucleotide primers specific for the 3 genes studied are performed. Semi-quantitative gene expression is estimated on DNA electrophoresis gels. An in silico analysis of the promoter sequences of the genes studied is also performed to identify regulatory binding protein domains involved in the response to salt stress.
    The results show that E. grandis seedlings respond to saline stress and are a good plant material for the functional analysis of plant genes. At the same time, there is a correlation between the stress response and the possible intervention of transcription factors linked to the type of stress employed here.

11
  • JACKSON ARAÚJO SILVA
  • ANALYSIS OF SEEDS OF Senna siamea THROUGH DIGITAL IMAGE PROCESSING

  • Líder : MARCIO DIAS PEREIRA
  • MIEMBROS DE LA BANCA :
  • CHARLINE ZARATIN ALVES
  • MARCIO DIAS PEREIRA
  • MAURO VASCONCELOS PACHECO
  • Data: 31-ene-2020


  • Resumen Espectáculo
  • Seed quality is one of the parameters of great importance among the criteria of establishment and establishment of a species. Thus, the determination of seed quality in a non-destructive and fast way, which is the case of X-ray, shows benefits in the seed industry, especially in the process of decision making during the separation of the lots according to their quality. Although efficient, the tools used need to be improved for better data processing, thereby strengthening the reliability and repeatability of the test. The objective of this study was to suggest a high-performance morphometric methodology using free tools in the processing of X-ray images of Senna siamea is seeds, that is, correlating the parameters of the physiological quality of the seeds, as well as the adequacy of methodologies for the analysis of seedlings. Two experiments were conducted. In both, five lots of S. siamea were used, and in the first experiment, ImageJ®, which is free software, was used to measure both seeds and seedlings, correlating with the traditional tests and thus evaluating the potential of physiological quality. In the second experiment, the reliability of a new software, developed for automated processing of the radiographed images, was evaluated without the use of subjective evaluations, correlating the data in order to identify relationships with the traditional tests. For the conventional criteria, as soon as the seeds were radiographed, they were subjected to the germination test, from which the variables related to the physiological quality were obtained. The obtained data were submitted to ANOVA, when significant, the averages were compared by the Tukey test (p≤0.05). Subsequently, Pearson's simple correlation coefficients (r) were calculated for all combinations between the physiological and physical quality evaluation tests of the seeds. Among the results, it was observed that the X-ray technique in the evaluation of seeds of S. siamea, demonstrated efficacy in the identification of damages, showing a relationship between the X-ray test and that of the physiological potential. Besides, it was possible to differentiate of batches from the analysis of seedlings images, being able to associate the relationship between this test as the image analysis of the radiographed seeds.

12
  • BRUNO SILVA GUIRRA
  • BIOCHEMICAL AND PHYSIOLOGICAL CHANGES IN SEEDS OF Combretum leprosum Mart. DURING STORAGE


  • Líder : SALVADOR BARROS TORRES
  • MIEMBROS DE LA BANCA :
  • MAURO VASCONCELOS PACHECO
  • SALVADOR BARROS TORRES
  • ALEK SANDRO DUTRA
  • Data: 29-may-2020


  • Resumen Espectáculo
  • The mofumbo (Combretum leprosum Mart.), Family Combretaceae, has exclusive distribution in South America. It is a species of great forest importance for the whole of Brazil and, mainly, for the Caatinga ecosystem. It presents several potentialities, in addition to contributing significantly to the conservation and improvement of soil quality in the recovery process of degraded areas and ecological succession in dry forests. Despite its importance, there are still no basic studies on the types of storage for maintaining the viability and vigor of seeds for a certain period. Thus, the objective was to evaluate the physiological and biochemical changes of C. leprosum seeds under different storage conditions. The completely randomized experimental design, in a factorial scheme (2 x 2 x 7), with two storage conditions x two forms of seed processing x seven storage periods (0; 60; 120; 180; 240; 300 and 360 days). The data of the quantitative factors were subjected to analysis of variance and the means compared by the Tukey test at 5% probability. For storage periods, regression analysis was performed. After collecting the fruits of C. leprosum, half of the lot was processed manually, the external protection that covered the seed was removed and the other part was kept the diaspores. For storage, all bare seeds and those protected with diaspores were packed in kraft paper bags and kept in two storage conditions: natural environment and air-conditioned chamber (10 ± 1 ° C; 53 ± 7% relative humidity). At the beginning and at 60-day intervals, for 360 days, the seeds were analyzed for the determination of water content, physiological quality (germination, germination speed index, length and dry mass of seedlings) and biochemistry (neutral lipids, sugars total and reducing agents, total free amino acids, starch and lipid peroxidation). The physiological variables expressed better results in the condition of natural environment, regardless of the way the seed is processed. Esse ambiente também proporcionou menor degradação da reserva de lipídios. Regarding starch, there was hydrolysis of this polysaccharide throughout the storage period. Finally, it was found that the deterioration of seeds after 180 days of storage is associated with the attack of reducing sugars to amino acids, which led to the Maillard reaction and resulted in reduced viability and vigor.

13
  • ADRIANA DOS SANTOS FERREIRA
  • MORPHOPHYSIOLOGICAL AND BIOCHEMICAL CHANGES IN SEEDLINGS OF Enterolobium contortisiliquum (Vell.) Morong UNDER ABIOTIC STRESSES

  • Líder : SALVADOR BARROS TORRES
  • MIEMBROS DE LA BANCA :
  • SALVADOR BARROS TORRES
  • FRANCISCO DE ASSIS DE OLIVEIRA
  • ALEK SANDRO DUTRA
  • LAURA ANDRADE CUSTODIO DE OLIVEIRA
  • Data: 15-jul-2020


  • Resumen Espectáculo
  • Enterolobium contortisiliquum (Vell.) Morong is a fast-growing tree species that has multiple purposes, such as medicinal, recovery of degraded areas, manufacture of boats, furniture and boxes in general. The objective of this study was to evaluate the morphophysiological and biochemical changes in E. contortisiliquum seedlings submitted to abiotic stresses. The experiment was carried out at the Academic Unit Specialized in Agricultural Sciences (UAECIA), belonging to the Federal University of Rio Grande do Norte (UFRN), Macaíba, RN - Brazil, in the first half of 2019. The design used was in randomized blocks, with five treatments and four repetitions, with the experimental unit consisting of twenty plants. The experimentation of the different stresses occurred independently. Water stress was performed in the following periods: 0. 4. 8. 12 and 16 days, saline stress was simulated in the following electrical conductivities of irrigation water (CEa): 0.3 (control); 2. 4. 6 and 8 dS.m-1. Before sowing, pre-germination treatment of overcoming dormancy was performed with the help of sandpaper. As a substrate, a mixture of common soil and tanned bovine manure (1: 1) was used. The evaluations were carried out at 30 days after sowing. The variables evaluated for water and saline stresses were: plant height, number of leaves, leaf area, stem diameter, root length, Dickson quality index, height and dry mass ratio of the aerial part, dry mass of the aerial part aerial, root and total dry mass, besides biochemical tests (total free amino acids, proline, total soluble sugars and starch). The results were submitted to analysis of variance by the F test at 5% probability and, in case of significance, submitted to regression analysis. E. contortisiliquum seedlings obtain greater initial growth in an environment with water availability. The four-day water stress period provides E. contortisiliquum seedlings with better drought tolerance. Osmotically active solutes act positively to minimize damage caused by increased water stress, whose mechanisms may be the main determinants used by plants in this condition. The gradual increase in salinity of the irrigation water was detrimental to the growth and accumulation of dry mass of E. contortisiliquum plants with a marked decrease from the 2 dS.m-1 threshold. The biochemical mechanism of tolerance to salt stress was due to the increase in amino acids, proline and total sugars, concomitantly with the consumption of starch reserves.

14
  • FELIPE GOMES BATISTA
  • NATURAL RESISTANCE OF FIVE WOOD FOREST SPECIES OF THE CAATINGA BIOME IN A ROTTING FIELD TEST

  • Líder : RAFAEL RODOLFO DE MELO
  • MIEMBROS DE LA BANCA :
  • RAFAEL RODOLFO DE MELO
  • DIEGO MARTINS STANGERLIN
  • LEANDRO CALEGARI
  • RAFAEL BELTRAME
  • Data: 15-jul-2020


  • Resumen Espectáculo
  • Wood has several uses and can be used for indoor or outdoor use. However, there are certain disadvantages that compromise its natural durability when subjected to direct contact with the soil. Knowing the resistance of species to deterioration is an important tool to improve their use and production for the market. The present study aimed to evaluate the natural resistance of the wood of five native species of the Caatinga - Pau branco (Auxemma oncocalyx Allemão), Jurema preta (Mimosa tenuiflora (Willd.) Poir.), Jurema-de-embira (Mimosa ophthalmocentra Mart. ex Benth), Pereiro (Aspidosperma pyrifolium Mart.) and Sabiá (Mimosa caesalpiniifolia Benth.) in field rot tests. Three trees were felled per species and disks were removed at 0 (base), 25, 50, 75 and 100% of the commercial height of the bole to determine physical properties (basic density, moisture content and porosity). For the chemical (holocellulose, lignin, extractives and ash) and biological (rotting field) analyzes, a log of 1,10 to 1,20 m obtained from the first section of each tree was used. As a comparison standard, Eucalyptus sp. treated. For the test in the rotting field, samples were made with dimensions of 50 cm in length and 8 to 12 cm in diameter, in which they were randomly distributed in the field between blocks and lines with spacing of 1,0 and 0,50 m from each other, respectively. The samples remained buried vertically up to half their length for 300 days, with collections being performed every two months. Among the species studied, M. ophthalmocentra was the one with the highest basic density and the lowest moisture content, while A. pyrifolium obtained the lowest basic density and high moisture content, and the highest percentage of porosity. The highest extractive values were found for M. tenuiflora and M. caesalpiniifolia. The constituents holocellulose and lignin, did not show differences between species. A. oncolalyx exposed the highest percentage of ash. In the rot field analysis, A pyrifolium was the most resistant, while M. tenuiflora and M. ophtalmocentra were the most attacked by deteriorating agents.

15
  • JOSEFA PATRÍCIA BALDUINO NICOLAU
  • ATMOSPHERIC PLASMA TECHNOLOGY AS A MODIFIER OF THE GERMINATIVE DYNAMICS OF SEEDS OF Pityrocarpa moniliformis (Benth.) Luckow & R. W. Jobson
  • Líder : POLIANA COQUEIRO DIAS
  • MIEMBROS DE LA BANCA :
  • MARCIO DIAS PEREIRA
  • ALEK SANDRO DUTRA
  • CHARLINE ZARATIN ALVES
  • DINNARA LAYZA SOUZA DA SILVA
  • RISELANE DE LUCENA ALCÂNTARA BRUNO
  • Data: 24-jul-2020


  • Resumen Espectáculo
  • Plasma technology consists of a fast, clean method that has great potential for use in agriculture, especially in modifying the integumentary surface of dormant seeds. The objective was to evaluate the effect of plasma application on overcoming dormancy of P. moniliformis seeds. The seeds were submitted to cold plasma for 0.5; 1; 1.5; 2; 3; 4 and 5 minutes, and as a control, seeds intact, without any type of treatment. As seeds they were submitted to the germination test and the results were used to determine the accumulation or Richards curve, moisture, soaking curve and electrical conductivity of the seeds. The design used was randomized, with four replicates per treatment. The wettability results were subjected to descriptive analysis, obtaining the mean and standard deviation for each treatment. For the data obtained in germination, proceed to an analysis of variation by the F test (5%) and, when significant, as the media of the procedures compared by the Tukey test. The plasma provides an increase in germination in all tests tested, when compared to the control.

16
  • RAIANE PEREIRA DE SALES
  • POPULATION ECOLOGY, GENETIC DIVERSITY AND MODELING OF THE ECOLOGICAL NICHE OF Spondias tuberosa Arruda

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • FABIO DE ALMEIDA VIEIRA
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • MURILO MALVEIRA BRANDÃO
  • Data: 29-jul-2020


  • Resumen Espectáculo
  • Spondias tuberosa (Anacardiaceae) is a tree native to Brazil with outstanding relevance in plant extraction. In fact, in the last three years, the amount produced in the vegetal extraction of fruits and the value of production were 23,777 tons and R $ 27 million, respectively. The objective of this study was to evaluate the spatial pattern, the biometry of the fruits, allometric variations and the intrapopulational genetic diversity, in addition to modeling areas of environmental suitability for S. tuberosa in climate change scenarios. The analysis of the genetic diversity of adult reproductive individuals was carried out using  molecular markers of Simple Sequence Inter Repetitions (ISSR). The maximum entropy algorithm (Maxent) was used in niche modeling for the present and future period, with two scenarios and four models of general atmosphere circulation being tested. The spatial pattern was aggregated, with a higher density of neighbors (NDF) within a radius of up to 55 m. The correlations between diameter at breast height, total height and canopy area were positive and significant (P <0.0001). The fruits had a length of 20.05 mm to 39.02 mm and a diameter between 17.73 mm and 35.48 mm, and the fresh mass with 11 g to 26.47 g. The fresh weight of fruits and diaspores showed the highest values of the variation coefficient. The greatest correlation was between fresh fruit mass and pulp yield (rs = 0.99). Nei's genetic diversity index was 0.37 (± 0.07) and Shannon's index was 0.55 (± 0.11). The Bayesian analysis defined four distinct genetic groups (K = 4). The state of Bahia had the highest production and commercialization of fruits in the years 1994 to 2018. The bioclimatic variable with the highest percentage of contribution to the suitability of S. tuberosa was annual precipitation (75.3%). It is concluded that the morphological and genetic characterization contributes to the conservation of S. tuberosa, so that it provides strategies such as the selection of genotypes for both commercial activities, to encourage extraction and the creation of germplasm banks, given  their socio-economic importance. It was found that the species had an increase in the areas of suitability in the Caatinga domain in the optimistic scenario, especially in Rio Grande do Norte, northern Bahia and northern Minas Gerais. It is suggested that these areas have a greater focus on management plans and conservation of the species.

17
  • IDRIÇA CASSAMA
  • PHYSICAL, CHEMICAL AND GERMINATIVE CHARACTERISTICS OF Pityrocarpa moniliformis (Benth) and Senna siamea (Lam) SEEDS TREATED WITH ATMOSPHERIC PLASMA

  • Líder : MARCIO DIAS PEREIRA
  • MIEMBROS DE LA BANCA :
  • MARCIO DIAS PEREIRA
  • RISELANE DE LUCENA ALCÂNTARA BRUNO
  • UBIRATAN CORREIA SILVA
  • CHARLINE ZARATIN ALVES
  • DINNARA LAYZA SOUZA DA SILVA
  • Data: 30-jul-2020


  • Resumen Espectáculo
  • Plasma can directly affect the chemical and physical structure of seeds. The objective of this study was to evaluate the effect of plasma, generated by a dielectric barrier discharge source (DBD), on the physical, chemical and germination characteristics of Pityrocarpa moniliformis (Benth) and Senna siamea (Lam) seeds. The seeds of both species were submitted to plasma in a coplanar plate covered by a petri dish of similar dimensions, the conditions of the plasma environment were obtained using the DBD generating source and the flow applied in the pulse to generate plasma occurred continuously, with a voltage of 10 KV at a working frequency of 4,000 Hertz, in an exposure time of 10 minutes. The physical-chemical alterations were diagnosed through the surface characterization using scanning electron microscopy (SEM) technique and the crack areas were calculated in percentage using the imageJ® software. The chemical analysis was carried out through infrared spectroscopy with Fourier transformation, in the Total Attenuated Reflection (FTIR-ATR) configuration. For physiological analyzes, a completely randomized design was used with four replications of 25 seeds for each species in a controlled environment at 25 0 C, the seeds were distributed on germitest paper, and kept for a period of 18 days in a cold chamber. The data were subjected to analysis of variance and the treatment means were compared at a significance level of 5% probability using the Tukey test. With the results obtained it is concluded that the DBD plasma was presented as an efficient technique, modified the physical structure and changed the chemical properties and provided an improvement in the seed germination of the species.

18
  • BYANCA DOS SANTOS MARTINS
  • FLORA DE CACTACEAE JUSS. IN THE STATE OF RIO GRANDE DO NORTE AND INTERACTIVE KEY FOR SPECIES IDENTIFICATION

  • Líder : ALICE DE MORAES CALVENTE
  • MIEMBROS DE LA BANCA :
  • ALICE DE MORAES CALVENTE
  • LEONARDO DE MELO VERSIEUX
  • FERNANDA ANTUNES CARVALHO
  • Data: 30-jul-2020


  • Resumen Espectáculo
  • The family Cactaceae Juss. is distributed throughout the Brazilian territory, represented by 39 genus and 261 species. In Northeastern Brazil, these are species of great economic interest and used for various purposes, such as forage, human food, medicinal and ornamental use, in addition to being important in maintaining regional biodiversity. Flora studies gather information that describes the diversity, use and conservation of plant species in a specific region, and include identification keys traditionally in the dichotomous format. Interactive electronic keys are more recent tools that associated to floras contribute substantially to the popularization of taxonomy and to the advancement of floristic, systematic and conservation studies. In this work, we aim to present a flora of species of Cactaceae and an interactive identification key for species that occur in Rio Grande do Norte, Brazil, listing their distribution, information on conservation data and description of species in the state. The construction of the key was in the free access software Xper² and, further on, the database was exported to the Xper³ platform and made available online. From data collection in the field and herbaria data, it was possible to document and describe 9 genera and 18 species: Brasiliopuntia (1), Cereus (2), Melocactus (3), Nopalea (1), Opuntia (2), Pereskia (1), Pilosocereus (4), Rhipsalis (1) and Tacinga (3). Data on geographic distribution, phenology, and ecology and conservation about the species were also presented.

19
  • MARYELLE CAMPOS SILVA
  • CIRCADIAN CHARACTERIZATION OF ACCUMULATION AND UTILIZATION OF NON-STRUCTURAL CARBOHYDRATES IN Erythrina velutina DURING LATE ESTABLISHMENT

  • Líder : EDUARDO LUIZ VOIGT
  • MIEMBROS DE LA BANCA :
  • EDUARDO LUIZ VOIGT
  • MAURO VASCONCELOS PACHECO
  • SERGIO LUIZ FERREIRA DA SILVA
  • Data: 31-jul-2020


  • Resumen Espectáculo
  • We carried out a circadian characterization of the non-structural carbohydrate dynamics in the different organs of Erythrina velutina seedlings at late establishment. Seeds were incubated under controlled conditions for 9 days and then seedlings were hydroponically grown in a greenhouse for 8 days. Gas exchanges were measured in the cordiform leaves every 2 h during the daytime (12 h) and seedlings were harvested every 4 h during the day-night cycle (24 h) to assess the contents of non-structural carbohydrates and the activities of amylases and invertases. Photosynthetic net rate was highly synchronized with transpiration rate under high irradiance, when the cordiform leaves assumed the paraheliotropic position and water use efficiency increased. Diel patterns of non-structural carbohydrate content were identified in the photosynthetic organs, in which the turnover of starchoperated far from its depletion at dawn. In the heterotrophic organs, however, changes in the starch content over 24 h may have maintained the supply of soluble sugars, buffering transient fluctuations in carbon availability. Although it seems that amylase activity was not influenced by the circadian rhythm in the different seedling organs, diel patterns of invertase activity were recognized in the leaves and roots.

20
  • ORNELA SILVA GOMES
  • FLORISTIC SURVEY OF PUBLIC SQUARES IN NATAL/RN

  • Líder : ALICE DE MORAES CALVENTE
  • MIEMBROS DE LA BANCA :
  • ADRIANA ROSA CARVALHO
  • ALICE DE MORAES CALVENTE
  • ANA CRISTINA ANDRADE DE AGUIAR DIAS
  • DEMÓSTENES FERREIRA DA SILVA FILHO
  • LEONARDO DE MELO VERSIEUX
  • Data: 31-jul-2020


  • Resumen Espectáculo
  • Public squares are urban green areas which promote the appreciation of nature, offering opportunities to recreation, community interaction and heathy habits. The vegetation in public squares interacts with the population mental and physical health, acting directly mainly on shading and aesthetics of public spaces. This vegetation may present elements selected only for their ornamental value or act as a form of ex situ conservation and promote the environmental education of the public. Or even, it may contain elements of the remaining native vegetation, helping to connect the biota of fragments of native vegetation surrounding cities. However, the majority of Brazilian cities do not even have control over their urban green areas and may not have formal knowledge of its floristic composition, what would be essential to guide the decision making about pruning, removal, implementation or phytosanitary treatments. In this work, we aimed to expand the knowledge about the urban flora of Natal-RN through a floristic survey and census of the trees of 90 public squares of the South Zone of Natal. The exotic and native origin of species was distinguished and indexes and values were calculated and compiled to better understand the composition, spatial distribution and similarity to adjacent green urban areas. In total we accounted 28 families, 79 species and 4006 individuals. The most representative species were Cocos nucifera and Anacardium occidentale and the ones with greater absolute frequency were Mangifera indica, Azadirachta indica, Anacardium occidentale and Cocus nucifera. Our results show the list of species composing these green areas, the proportion of exotics and natives, the relative size of public squares, the number of individuals per area unit, the quantification of total green areas and usable green areas, the correlation calculated among these variables and the similarity between the vegetation of the public squares and areas of urban forests. This study highlights the great amount of exotics in urban spaces and the general bad condition of public green areas available for the population of Natal.

21
  • SARAH REBEKA RODRIGUES MARQUES
  • ANTICARIOGENIC POTENTIAL OF TANNINS OF FOREST SPECIES

  • Líder : TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • MIEMBROS DE LA BANCA :
  • LEANDRO CALEGARI
  • RENATA MARTINS BRAGA
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • Data: 31-jul-2020


  • Resumen Espectáculo
  • Studies on compounds from secondary plant metabolism may increase our ability to understand the pharmaceutical potential of tropical flora. The presence of substances such as tannins arouses pharmaceutical interest in several plant species, based on the principle of popular use, and their antimicrobial, antioxidant, antiviral and anti-tumor properties of tannins, which are already well known and documented. The aim of this study is to extract, chemically characterize the tannins of Acacia mangium Willd., Azadirachta indica A. Juss Mimosa tenuiflora Willd, Mimosa caesalpiniifolia Benth ,. and to verify antibacterial activity of these tannins against strains of cariogenic bacteria. The content of tannins present in bark of trees from commercial plantations with 4 years of age, located in an experimental area in the municipality of Macaíba, State of Rio Grande do Norte, was analyzed. The extractions were performed in hot water. Total solids content (TST), Stiasny index (IS) and condensed tannin content (TTC) were determined. The chemical characterization of tannic extracts was carried out using infrared spectrometry with Fourrier transform. The evaluation of the antibacterial activity of the tannins was performed by means of the Minimum Inhibitory Concentration (MIC) test for the species Streptococcus mutans (UA159), Lactobacillus acidophilus (ATCC IAL523), Lactobacillus casei (ATCC 193) and Candida albicans (SC5314). The quantification of the extracts showed that M. tenuiflora and A. mangium presented higher percentages of TTC (23.40% and 12.41%, respectively), indicating the potential for tannin production on an industrial scale. Although M. caesalpiniifolia had a low TTC (8.38%), this species had a high IS (91.27%), characterized by a high degree of pure tannins. Regarding chemical characterization, the tannins of all species showed very similar spectra, with strong OH elongation in the range of 3,439 to 3,418 cm-1. No evaluated extract showed inhibitory activity against the tested microorganisms (MIC> 2500 µg / mL).

22
  • VANESSA PULCHERIA PINHEIRO DA COSTA
  • VEGETATION COMPOSITION AND STRUCTURE IN AN ATLANTIC FOREST REMAINING IN RIO GRANDE DO NORTE

  • Líder : ALAN CAUÊ DE HOLANDA
  • MIEMBROS DE LA BANCA :
  • ALAN CAUÊ DE HOLANDA
  • LEONARDO DE MELO VERSIEUX
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • ALLYSON ROCHA ALVES
  • Data: 21-ago-2020


  • Resumen Espectáculo
  • As a result of anthropic processes, the Atlantic Forest has only 12.4% of its original composition, thus, preservation actions based on floristic and phytosociological studies, become essential to diagnose floristic and structural patterns in forest fragments. The objective of the work was to diagnose the floristic and structural modifications of the shrub-tree communities in three sectors with different disturbance histories and under influences caused by the number of trails. The study was carried out in the Municipal Natural Park José Mulato, which is a remaining of Atlantic Forest with 82.5 ha with seasonal Semideciduous Forest type vegetation. The remaining was divided into three sectors and along the trails 25 sample units of 20 m x 20 m (400 m²) were allocated at random, totaling 10,000 m2. DAP≥5 was used as an inclusion criterion for the measurement of trees DAP≥5,0 cm. To describe the structure, the parameters of absolute density, absolute frequency, absolute dominance and importance value were calculated, in addition to comparing the diversity and equability indices and, analyzing the diametric structure. Analyzes of clusters and indicator species were performed. In total, 784 individuals belonging to 25 families and 53 species were inventoried, 37 of which were identified at the species level, three at the gender level, six at the family level and seven indeterminate. In sector A, 233 individuals distributed in 22 families and 37 species, sector B, 292 individuals distributed in 23 families and 41 species and, sector C, 259 individuals distributed in 19 families and 28 species. The analyzes showed a distinction in terms of composition and structure between sector A and C, and sector B as a transition area. Only sectors A and C showed indicator species. Sector C obtained greater equability and sector B had the highest Shannon index. There was a floristic and structural distinction between sectors, reflecting, at first, the anthropogenic influences in time and space. The sectors with the highest levels of disruption showed high resilience.

23
  • DIÊGO AUGUSTO AZEVEDO DA SILVA
  • MOBILIZATION OF RESERVES AND PREMILINARY PROFILE OF SECONDARY METABOLITES DURING AND AFTER GERMINATION IN Erythrina velutina

  • Líder : EDUARDO LUIZ VOIGT
  • MIEMBROS DE LA BANCA :
  • EDUARDO LUIZ VOIGT
  • SERGIO LUIZ FERREIRA DA SILVA
  • SIDNEY CARLOS PRAXEDES
  • Data: 27-ago-2020


  • Resumen Espectáculo
  • Considering the medicinal potential of Erythrina velutina Willd., a woody species native to the Caatinga, the aim of this work was to characterize the mobilization of reserves in parallel with the content secondary metabolites during seed germination and seedling establishment. Hence, seeds were scarified, surface-sterilized, planted between towel paper sheets and cultivated under controlled conditions. Then, seedlings were transferred to distilled water in hydroponics and cultivated in a greenhouse. In a time-coarse experiment, seedling growth, reserve mobilization and the content of soluble sugars and free amino acids, as well as the preliminary profile of secondary metabolites were assessed in the cotyledons during and after germination. Germination included the stages of imbibed seed and radicle protrusion, whereas establishment encompassed hypocotyl emergence, plumule hook opening, and the expansion of cordiform leaves, first trifoliate leaf and second trifoliate leaf. Seeds contained 20% starch, 14,5% storage proteins, 11,6% neutral lipids and 5,7% non-reducing sugars in dry weight basis. The major reserves were synchronically and intensely mobilized from apical hook opening, while non-reducing sugars were utilized from hypocotyl emergence. The activity of amylases, lipases and acid proteases increased from cordiform leaf emergence, coinciding with the mobilization of starch, lipids and proteins, respectively. By thin layer chromatography, it was possible to verify the presence of terpenes and phenolic acids during the experiment. The results indicate the occurrence of flavonoids from seed germination and at the expansion of cordiform leaves. Throughout the experiment, it was evidenced the presence of alkaloids, mainly in the imbibed seed.  The elucidation of these processes may help in understanding the strategies used by E. velutina to colonize the environment as a Caatinga pioneer species.

24
  • FRANCISCA JANEKELY BURITI

  • DNA Barcode in Spondias from  Northeast: the specific case of S. bahiensis

  • Líder : PAULO SERGIO MARINHO LUCIO
  • MIEMBROS DE LA BANCA :
  • AULUS ESTEVÃO ANJOS DE DEUS BARBOSA
  • CARLOS ALFREDO GALINDO BLAHA
  • PAULO SERGIO MARINHO LUCIO
  • Data: 04-sep-2020


  • Resumen Espectáculo
  • Spondias bahiensis P. Carvalho, Van den Berg & M. Machado is one of the five species of Spondias genus present in Brazil, mainly occurring in the Northeast of Brazil. The plant was identified for many years as Spondias sp due to the doubts about the possibility of being a hybrid between Spondias tuberosa and Spondias mombin. S. bahiensis was identified based on molecular biology studies involving barcode markers that confirmed the plant as a new species. The objective of this study is to address the intraspecific variability of S. bahiensis species in relation to the morphological characteristics of the fruit and the fruit flavor and to resolve doubts related to the classification of the specie that could remain exist. We intend to investigate if the genetic variability in the species can be accessed with the available barcode markers. Methodology used consisted in collecting plant material (young leaves) from five species of Spondias, including S. bahiensis, at different locations in the states of Rio Grande do Norte and Paraíba, and carrying out PCR amplifications with universal barcodes markers rbcL, matK, trnG-trnS, trnH-psbA, rpoB, and rpoC. The intraspecific variabilaidae of S. bahiensis was studied from experimental plantings of EMPARN - Agricultural Research Company of Rio Grande do Norte in the municipality of Ipanguaçu, Rio Grande do Norte. The results obtained allowed the amplification and sequencing of the barcode regions by the different markers used and the realization of phylogenetic trees that confirm, in this analysis, the taxonomic position of S. bahiensis in comparison with the other species of the genus.

25
  • JAYANE KARINE PEREIRA DE ARAÚJO
  •  

    BIOMETRIC CHARACTERIZATION OF DIASPORES AND SEEDS AND VEGETATIVE PROPAGATION OF Cordia oncocalyx (Allemão) Baill.

  • Líder : POLIANA COQUEIRO DIAS
  • MIEMBROS DE LA BANCA :
  • LUCIANA COELHO DE MOURA
  • GLAUCIANA DA MATA ATAÍDE
  • POLIANA COQUEIRO DIAS
  • Data: 22-dic-2020


  • Resumen Espectáculo
  • Cordia oncocalyx (Allemão) Baill, popularly known as pau-branco is an endemic species of the Caatinga and has multiple uses. Due to the lack of information to enable its perpetuation and conservation, studies related to biometric evaluation, as well as the propagation are important for the production of seedlings of the species. The aim of this study was to analyze the biometric characteristics of diaspores and seeds manually and by digital image analysis, in order to compare the best evaluation method. In addition, to analyze in vitroex vitro, and cuttings of C. oncocalyx, with a view to optimizing the production of seedlings of the species. For the determination of biometric parameters by manual and digital method, 300 diaspores and 300 seeds were used. Subsequently, the ex vitroemergency was performed, testing the treatments in the diaspores: control (without scarification), scarification in the peduncular region with and without hydration for 24 hours, scarification in the region opposite the peduncle with and without hydration for 24 hours, scarification in the lateral with and without hydration for 24 h, scarification with immersion in sulfuric acid for 90 min and for 180 min. Finally, in vitro germination was tested, using different compositions of the culture medium: 12 g.L-1 of sucrose and 1.80 g.L-1 of M&S medium; 12 g.L-1 of sucrose and 0.90 g.L-1 of M&S medium; 6 g.L-1 of sucrose and 1.80 g.L-1 of M&S medium; 6 g.L-1 of sucrose and 0.90 g.L-1 of M&S medium. For the evaluation of the effect of the time of collection and the use of indolbutyric acid (IBA) on the rooting of cuttings of C. oncocalyx, the propagules were collected in Mossoró-RN, in April and July 2019, and in February 2020 The AIB concentrations tested were 0; 2000; 4000 and 8000 mg.L-1. With regard to the use of AIB and the pyroligneous extract in rooting C. oncocalyx, the cuttings were immersed in AIB solution at concentrations of 0; 2000; 4000 and 8000 mg.L-1 and pyroligneous extract at 0; 10; 100; 500 and 1000 ml.L-1. In relation to the determination of the optimal rooting time, evaluations were made regarding oxidation, swelling, presence of calluses and rooting at the base of the cuttings. Regarding the results obtained, it was demonstrated that digital image processing is a viable and fast technique in obtaining biometric parameters for diaspores and seeds. Chemical and mechanical treatments in the diaspores did not promote the emergency. The composition of the culture medium influenced the percentage of in vitro germination, with the maximum value (96% of germination) observed with 6 g.L-1 of sucrose and 0.90 g.L-1 of M&S medium. Seminiferous propagation of C. oncocalyx can be successfully performed when the seeds are germinated in vitro and digital image processing shows solidity and applicability with a view to the evaluation of quantitative parameters of C. oncocalyx fruits and seeds. In the semiarid, the cutting of C. oncocalyx must be carried out in the rainy season, right after the emission of the shoots and using 2000 mg.L-1of IBA. Based on the results found, it is concluded that the use of IBA and EP, in shoots collected at the beginning of the dry season, are not indicated as inducers of adventitious rooting in cuttings of C. oncocalyx. It was found that the cuttings need to remain in the propagation environment for about 76 days, to achieve 100% rooting. It was also observed that digital image analysis proved to be a fast and accurate tool in obtaining the length and number of roots, as well as providing additional characters, such as area and perimeter of the roots of C. oncocalyx. Therefore, it is concluded that the present study contains silvicultural information that can contribute to the production of seedlings and perpetuation of C. oncocalyx.

26
  • ALVARO DA COSTA FREIRE
  • VEGETATIVE PROPAGATION OF Mimosa caesalpiniifolia BENTH. BY MINIESTAQUIA AND MORPHOANATOMICAL ANALYSIS OF ADVENTITIOUS ROOTING

  • Líder : POLIANA COQUEIRO DIAS
  • MIEMBROS DE LA BANCA :
  • POLIANA COQUEIRO DIAS
  • SEFORA GIL GOMES DE FARIAS
  • RICARDO GALLO
  • Data: 22-dic-2020


  • Resumen Espectáculo
    • Mimosa caesalpiniifolia is a forest species with great potential for the sustainable exploitation of wood in the Northeast region of Brazil, being considered a competitive source of renewable energy due to its rapid growth. However, the production of seedlings with quality and quantity still represents an obstacle in the silvicultural development of the species. Thus, vegetative propagation can allow the cultivation of seedlings with high physiological and sanitary quality in reduced space and time, optimizing large-scale production. This work aimed to define a vegetative propagation methodology for the species M. caesalpiniifolia by minicutting, aiming at the commercial production of seedlings. Specifically, the objective was to evaluate the influence of indolebutyric acid and leaf reduction on adventitious rooting in shoots from individuals with and without thorns, as well as the objective of studying the dynamics and morphoanatomy of adventitious rooting. For this purpose, the mini garden in masonry canals was produced from the collection and planting of seeds, which after installed provided sprouts to build the mini garden in polyethylene pots, it was established from selected phenotypes of M. caesalpiniifolia based on the presence and absence of thorns.As standard for all experiments, the minicuttings were made using apic shoots with 10 cm in length, keeping two pairs of leaves. Cutting occurred in 55 cm³ tubes containing organic BioPlant substrate®. All evaluations were performed at 30, 37 and 60 days, ascertaining the percentage of rooting, percentage of roots observed at the lower end of the tubes, length of shoots, diameter of the minicuttings, number of shoots, number of roots at the base of the minicuttings and fresh and dry biomass of the aerial part and root system. For the analysis of the concentration of indolebutyric acid in both types of systems (masonry canals and vessels) 4 concentrations (0, 2000, 4000 and 8000 mg L-1) were used. The influence of leaf reduction on the rooting of minicuttings was tested by evaluating the complete reduction of leaves (100%), reduction of 50% and the use of leaves without reduction of the area (0%). In the dynamics of adventitious rooting, evaluations were performed every ten days, observing the percentage of minicuttings with some degree of modification, oxidation of the base, presence of calluses and percentage of rooted minicuttings, as well as the average length of the roots and the largest root. For morphoanatomy, histological slides from the region of origin of the roots in the minicuttings were produced. In the minicuttings of individuals with and without thorn, the best results regarding adventitious rooting are observed when using acupic and intermediate shoots, respectively. The mini-strains propagated via seeds and managed in a sand canal system and the mini-strains propagated via minicutting and managed in pots produce similar results regarding adventitious rooting. The shoots from both mini-strains via seeds and mini-strains obtained via minicutting behave equally as to adventitious rooting. Para adventitious rooting in the minicuttings of individuals with thorns there is no need to use IBA, however, for individuals without thorns it is recommended concentrations of IBA between 4000 and 8000 mg L-1. The 50% of leaf reduction area is indicated for vegetative propagation via minicutting of M. caesalpiniifolia in individuals with and without thorns. Moreover, the rooting speed is different for individuals with and without thorns and the characterization of morphoanatomy in minicuttings indicates that there are no anatomical barriers in the rooting of minicuttings, with roots arising from the procambium.
2019
Disertaciones
1
  • ELIAS COSTA DE SOUZA
  • PRODUCTION, CHARACTERIZATION AND UTILIZATION OF Eucalyptus urograndis CARBONS OXIDATED WITH H2O2

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • RENATA MARTINS BRAGA
  • PEDRO NICÓ DE MEDEIROS NETO
  • Data: 31-ene-2019


  • Resumen Espectáculo
  • Activated carbon is an important product, used in several areas, with the most diverse applications, among them we can highlight its environmental application, acting in the remediation of impacts caused by industries, among others. The aim of this work was to perform the oxidation and characterization of Eucalyptus urograndis carbon, oxidized with hydrogen peroxide (H2O2) and to test them in the removal of heavy metals in aqueous solution, by performing a thermodynamic study of the adsorption process. Wood discs of a five-year-old Eucalyptus grandis x Eucalyptus urophylla hybrid were used to make the carbonizations. After charring, part of the material was oxidized on a magnetic stirrer at 80 °C for 4 h using 30% H2O2. Then, the characterization (TG-DTG, XRD, MEV and CHNS-O) of the oxidized carbon was performed, after, adsorption kinetics were performed in aqueous medium using a synthetic solution of Cu (II), analyzing pH of the solution and the mass of the adsorbents. Finally, the Langmuir and Freundlich isotherms were prepared for both a single metal system (Cu) and a system with a mixture of metals (Cu, Ni, Cd) at concentrations ranging from 50 to 250 ppm. The adsorbent oxidized with H2O2 reached the adsorption equilibrium with only 30 seconds in the system tested. The ideal adsorbent mass found was 0.4 g. The best adsorption capacity of the oxidized adsorbent was 263.77 mg.g-1 for the experimental values and 235.77 mg.g-1 for the value calculated by the Langmuir model. The most ideal adsorption isotherm model applied was Langmuir, with a correlation coefficient of 0.9976 for the oxidized carbon. In a system containing 3 different metals, the total adsorption capacity of the oxidized carbon was equal to 305.35 mg.L-1 for the experimental values and 270.91 mg.g-1 for the values calculated by the Langmuir Isotherm. It was observed that the adsorption affinity follows the sequence: Cu>Cd>Ni. Eucalyptus urograndis carbon oxidized with H2O2 proved to be efficient for removal of heavy metals from aqueous solutions and the total adsorption capacity increases when the adsorbent is used in a system containing more than one metal. The oxidation caused morphological changes in the charcoal, thus favoring its adsorption capacity.

2
  • VITÓRIA RÉGIA ALVES CAVALCANTE BEZERRA
  • STRUCTURAL AND FUNCTIONAL CHARACTERIZATION OF THIOREDOXIN GENES IN Eucalyptus grandis

  • Líder : PAULO SERGIO MARINHO LUCIO
  • MIEMBROS DE LA BANCA :
  • CARLOS ALFREDO GALINDO BLAHA
  • GLAUBER HENRIQUE DE SOUSA NUNES
  • PAULO SERGIO MARINHO LUCIO
  • Data: 31-ene-2019


  • Resumen Espectáculo
  • Tree genomes have been sequenced over the past ten years and are a source of basic information for the study of multigenerational families in plants. Comparative genomics, once the complete genome sequences are made available in public banks, is a potent tool to progress with the study of functional gene characterization. In this work, the interest is concentrated in the genes that code thioredoxin and considers the diversity, structure and expression of these genes in the genome of Eucalyptus grandis. For this purpose, bioinformatics tools in public domain platforms were used to identify the coding sequences, to validate the data already obtained with the eucalyptus transcriptome project carried out previously, and to characterize the in silico structure and expression of the genes. The results obtained confirm, through phylogenetic trees containing different thioredoxins from superior plants already sequenced, the presence of multiple sequences in the genome under analysis for all the different types and subgroups of thioredoxins already identified in other genomes. The expression of these genes is distributed in several tissues of the plant, confirming the plasticity and functional complexity of the oxidation-reduction system in plants.

3
  • FRANCIVAL CARDOSO FELIX
  • In situ conservation of Pityrocarpa moniliformis (Benth.) Luckow & R. W. Jobson for selection of matrices trees

  • Líder : MAURO VASCONCELOS PACHECO
  • MIEMBROS DE LA BANCA :
  • MAURO VASCONCELOS PACHECO
  • PAULO SERGIO MARINHO LUCIO
  • KATIANE DA ROSA GOMES DA SILVA
  • Data: 31-ene-2019


  • Resumen Espectáculo
  • Pityrocarpa moniliformis (Benth.) Luckow & RW Jobson (Fabaceae) is a tree species that has social, ecological and economic potential for the Northeast of Brazil, with several uses for timber and non-timber, conservation and development of semi-arid regions. The objective of this work was to select P. moniliformis matrices for the production of quality seeds and in situ conservation, evaluating the genetic diversity with the use of molecular markers Inter Simple Sequence Repeat (ISSR), and seed biometry by digital imaging for studies of genetic divergence. In Chapter 01, 28 ISSR molecular markers were tested, evaluating the total number of loci, polymorphism rate and content value of the polymorphic information (PIC). Seven primers were selected, which provided 74 loci, 82% polymorphism and PIC of 0.344. Therefore, the molecular markers ISSR (UBC 827, 840, 844, 857, 859, 860 and 873) were selected for genetic diversity studies of P. moniliformis. In Chapter 02, we performed the biometric of the seeds of 33 lots by means of digital image processing, with analysis of the descriptive statistics, main components, and correlation between Euclidean distance and genetic similarity of trees with the use of molecular markers ISSR. The digital image processing was efficient in gauging and detecting biometric differences between seed lots, which have different morphological and biometric aspects due to genetic differences between P. moniliformis trees. In chapter 03, seeds of 44 trees were submitted to quality determination and genetic diversity for selected matrices and progenies. 77% and 43% of the trees produced seeds with germination higher than 50% and 70%, respectively. The selected progenies represent 64.4% of the source of total variation in the loci, and only 35.6% are due to variation between matrices. The P. moniliformis trees produce seeds with different levels of quality, being selected as trees producing seeds of high and medium physiological quality, eleven and fifteen matrices, respectively.

4
  • JALTIERY BEZERRA DE SOUZA
  • POTENTIAL FOR THE USE OF TANANS OF Acacia mangium IN THE PRODUCTION OF ADHESIVE FOR WOOD COLLAGE

  • Líder : TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • MIEMBROS DE LA BANCA :
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • ERMELINDA MARIA MOTA OLIVEIRA
  • THAÍS BRITO SOUSA
  • Data: 27-feb-2019


  • Resumen Espectáculo
  • In order to be successful in the process of wood bonding it is necessary to study and know the characteristics of each adhesive used, aiming at its better use, increasing the quality of the piece and reducing costs. The aim of this work was to quantify the amount of tannic substances present in the bark of Acacia Mangium Willd due to the influence of the soil preparation and the collection period (dry and rainy), as well as to test its efficiency in the production of wood adhesives. The collections were in the experimental experimental area of the Agricultural School of Jundiaí, Macaíba, Rio Grande do Norte, in the months of June of 2017 and January of 2018, respectively rainy and dry period. Eight individuals were slaughtered in the rainy season and four in the dry season to collect their bark. The husks were removed from the stem and twigs, ground in a knife mill, sorted into sieves and used for the extraction of tannins, particles smaller than 1.0 x 2.0 cm and greater than 0.2 x 0.2 cm (aperture of the sieves). The tannins for the production of adhesives were extracted in distilled water, placed in a stainless steel container, placed in an autoclave at the boiling temperature of the water at atmospheric pressure, after extraction were concentrated by evaporation in a greenhouse and kept at a temperature of 35 ° C. ± 45 ° C until complete evaporation and becoming an anhydrous material. The content of total solids, Stiasny index and condensed tannin content of A. mangium bark collected in both periods (dry and rainy) were evaluated. The adhesives were produced in the Laboratory of Anatomy of the Wood and Wood Panels of the Federal University of Lavras (UFLA), Lavras - MG, after this stage were made panels of Pinus sp. with dimensions of 30 x 30 cm, consisting of five slides of Pinus sp. and adhesives of A. mangium tannin, A. mearnsi tannin and Phenol-formaldehyde to evaluate the quality of the adhesives and subsequently the physical test of water absorption and the mechanical shear and janka hardness. It is concluded that the tannin content of the bark of the Acacia mangium species from the city of Macaíba / RN in the Northeast Region of Brazil was not affected by the treatment of the soil received and that it can be classified as a tannin producer in the rainy season. be used as a wood adhesive.

5
  • LUCÉLIO MENDES FERREIRA
  • CHARACTERIZATION OF THE BIOADSORVENT PRODUCED FROM CASTOR BEAN (Ricinus communis L.)

  • Líder : RAFAEL RODOLFO DE MELO
  • MIEMBROS DE LA BANCA :
  • CLEBER BRITO DE SOUZA
  • RAFAEL RODOLFO DE MELO
  • RENATA MARTINS BRAGA
  • Data: 04-abr-2019


  • Resumen Espectáculo
  • Contamination of a course is not always detectable. The adsorption is one of the most used technologies in the removal of contaminants of waters, has been gaining prominence. Without effluent treatment, adsorption with activated carbon (CA) is presented as an efficient and low cost method. The main advantage of the production of disposable waste is often inadequate. In this context, the study aims to obtain the consumption of agroindustrial residues (castor-bean) in the production of activated charcoal with adsorbent characteristics that can later be used in the application of an industrial effluent treatme nt. Coals have different types of activators, time and temperature, from castor bean cake. The yields were characterized by a chemical analysis, thermogravimetric (TGA), yield, zero load pH (pHcz), mesoporosity, Brunauer surface, Emmett and Teller (BET), scanning electron microscopy (SEM). After a characterization, adsorption tests of methylene blue were performed, aiming at adsorption capacity of the same,  and the results applied in the Langmuir and Freundlich equations to verify the fit of the data as. The chemical characterization of the castor bean (TM) showed that the material presented a heterogeneous structural structure, with its components of cellulose, hemicellulose and lignin. The TGA analysis was stable during decomposition and increased at 400 °C, and pHcz of the coals with broad basal power ranges, and with the development of mesopores of good adsorptive capacity for  CA at 800 °C. The adsorption of N2  showed CA with isotherms of type IV, images exhibited with appearances of analysis in the  MEV.  The best result was the adsorption test in CA 800°C with 60 minutes and 40% of phosphoric acid (H3PO4) and the mathematical model that best suited  a Langmuir isotherm with a comedy of 0.99948,  showing that the type of absorption was monolayers.

6
  • IZABELLE RODRIGUES FERREIRA GOMES
  • IS THE EFFECT OF PLANT SPACING ON THE ENERGY PRODUCTION OF EUCALYPTUS WOOD IMPLEMENTED IN THE SEMIARID?

  • Líder : ROSIMEIRE CAVALCANTE DOS SANTOS
  • MIEMBROS DE LA BANCA :
  • GRAZIELA BAPTISTA VIDAURRE
  • GUALTER GUENTHER COSTA DA SILVA
  • OTÁVIO CAMARGO CAMPOE
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • Data: 10-jun-2019


  • Resumen Espectáculo
  • The objective of this work was to evaluate the influence of five planting spacings on the production of wood energy from the clone Eucalyptus urophylla x Eucalyptus brassiana, at 4.2 years of age, implanted in the state of Rio Grande do Norte, Brazil. The experimental design was completely randomized, arranged in the factorial scheme (10 x 5). The first factor being composed of different positions in the longitudinal direction of the trees, being 0% - base; DAP; 12.5%; 25%; 37.5%; 50%; 67.5%; 75%; 87.5% and 100% of commercial height, by five different planting spacings (3.0 mx 0.5 m, 3.0 mx 1.5 m, 3.0 mx 3.0 m, 3.0 mx 5 , 0 m and 3.0 mx 6.5 m) and three replicates will be used each, totaling 15 trees. The analyzes of basic density and higher calorific value of wood were carried out, as well as the volumetric productivity in wood every 6 months, during 4.2 years and, finally, the wood energy production in m³ and per hectare. The spacing affected the basic density of the wood and, consequently, the amount of energy produced, being favored by spacing 3.0 m x 3.0 m, which is indicated for the conditions under study and for the energy production of the wood.


7
  • LUIZ AUGUSTO DA SILVA CORREIA
  • ENERGY CHARACTERIZATION OF FRUIT AND SEEDS OF Pachira aquatica Aubl. FOR APPLICATION IN THERMO-CHEMICAL CONVERSION PROCESSES

  • Líder : RENATA MARTINS BRAGA
  • MIEMBROS DE LA BANCA :
  • ALFREDO ISMAEL CURBELO GARNICA
  • ELANIA MARIA FERNANDES SILVA
  • RENATA MARTINS BRAGA
  • Data: 29-jul-2019


  • Resumen Espectáculo
  • The study of different sources of renewable energy has been intensifying because to the current climate changes, the population increase and the increasing energy demand. Thus, biomass appears as an alternative resource due to its availability and potential of transformation in products and biofuels. Its characterization allows to evaluate its energetic potential for application in energy conversion processes. This work aims at the energetic characterization of the fruit peels of Pachira aquatica Aubl. to evaluate its energy potential for application in thermochemical conversion processes. The energy characterization was carried out from the physical-chemical and thermal characterization of the biomass, it was performed the immediate analysis, for determination the percentage of moisture (ASTM E 871-81), volatile materials (ASTM E 872-85) and ash ( ASTM E 1755-01), in addition to fixed carbon, calculated by difference; the elemental analysis, to determine the percentage of carbon, hydrogen and nitrogen; the apparent density (ASTM E 873-82); the hemicellulose (FDA), cellulose (FDN) and lignin (Klason) content;  the thermogravimetric analysis, using thermogravimetric balance model Q600 SDT of TA Instruments®; the spectroscopy in the infrared region, performed in infrared spectrophotometer with Fourier transform; and analytical pyrolysis from a pyrolyzer coupled to gas chromatography. The fruit epicarp biomass of Pachira aquatica presents a lignocellulosic biomass containing 6.58% of moisture,76.90% of volatile material, 5,57% of ash, 11.43% of fixed carbon, apparent density of 252.6 kg/m3 and higher calorific value of 16.24 MJ/kg. It also presents 18.62 of hemicellulose, 45,23% of cellulose and 10.80% of lignin. Chemical compounds identified as products of rapid pyrolysis were mostly oxygenated compounds such as phenols and ketones. The carbonization of the fruit epicarp showed a 32.03% gravimetric charcoal yield, a pyrolignous liquid of 46.53% and a non-condensible gas of 21.44%. The results indicate that the biomass form the fruits peels of Pachira aquatica presents as potential lignocellulosic biomass for application in conversion processes such as pyrolysis and gasification, besides showing compatible characteristics for the production of second generation ethanol.

8
  • GABRIELA OLIVEIRA DE SOUZA
  • ASSESSMENT OF THE TECHNICAL FEASIBILITY OF PRODUCING EDGE-GLUED PANELS WITH WOOD FROM THREE BRAZILIAN DRY FOREST TREE SPECIES

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • RAFAEL RODOLFO DE MELO
  • NEYTON DE OLIVEIRA MIRANDA
  • Data: 29-jul-2019


  • Resumen Espectáculo
  • This article reports an experiment to evaluate the technical viability of producing edge-glued panels (EGPs) with wood from three Brazilian dry forest species: Aspidosperma pyrifolium, Cordia oncocalyx and Mimosa caesalpinifolia. Five adhesives were used: polyvinyl acetate D3 (PVA D3), polyvinyl acetate D4 (PVA D4), castor oil polyurethane (CP), polymer isocyanate emulsion (PIE) and melamine-urea-formaldehyde (MUF). The experimental design was completely randomized, involving 3 wood species, 5 adhesives and 5 replicates, totaling 75 observations. Physical-chemical properties of the wood species, basic density, extractives content and pH, were determined. Wood joists were laterally bonded and after conditioning were sawn to obtain the test specimens. Before evaluation of bonding quality by mechanical testing, the specimens were separated into groups, each one submitted to a different pretreatment: dry and moist condition and after 6-hour boil test and boil cycle test. The glueline performance indicators were the 5th lower percentile and the percentage of wood failure. The three wood species showed potential for production of EGPs and at least two adhesives (CP and MUF) resulted in bonded joists able to withstand the 6-hour boil test and the boil cycle test. Despite the observation of a negative correlation between extractives content and 5th lower percentile, when the adhesive MUF was used, this detrimental effect was overcome and all the joists reached the minimum strength required by the technical standards.

9
  • CYNTHIA PATRICIA DE SOUSA SANTOS
  • WOODEN ENERGY STOCK OF CAATINGA FOREST SPECIES AND USING IN RED BURNING CERAMICS

  • Líder : ROSIMEIRE CAVALCANTE DOS SANTOS
  • MIEMBROS DE LA BANCA :
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • CARLOS ALBERTO PASKOCIMAS
  • LEONLENE DE SOUSA AGUIAR
  • Data: 29-jul-2019


  • Resumen Espectáculo
  • The sustainable use and commercialization of native wood for energy purposes depends on the determination of the difference between the amount of energy produced in areas under sustainable forest management and the understanding of the performance of this fuel in the main sector that consumes it in Rio Grande do Norte, of red ceramic. Within this context, the objective was to study the amount of energy of the wood stored in three different areas under sustainable forest management in the RN and the quality of the wood of Anacardium occidentale and Mimosa tenuiflora during the burning of pieces of red ceramics. For the study of article 1, 5 forest species for area I (Campo Grande), 6 for area II (Cruzeta) and 12 for area III (Touros) were selected based on the importance value index. Three trees were felled to obtain discs at 0, 25, 50, 75 and 100% of the commercial height of the tree. From this, the basic density, the upper calorific value and the calculation of the energy stored by species and area were determined. The experiment was evaluated according to the completely randomized design, with a factorial of 5 x 6 x 12, with three replicates (sample trees) in each area. For the article 2, the woods of Anacardium occidentale and Mimosa tenuiflora were used during the burning of the bricks and for that, three treatments were adopted, namely: (0JP) 100% Anacardium occidentale; (50JP) 50% Mimosa tenuiflora + 50% Anacardium occidentale; and (100JP) 100% Mimosa tenuiflora. The wood stacking factor of both species was determined by Newton method to determine the actual consumption of wood (st) per treatment and the total burning time and product quality were verified. It was concluded that there is a difference in the amount of energy stored in the wood of the studied forest species, which reflected in the energy productivity in each area under study. In this way, area III (Bulls) was highlighted by the greater potential of energy productivity due to the greater number of energy species. Regarding the wood performance of the species used during the burning of the bricks, the 50CJP treatment provided a reduction in the fuel consumption, as well as a higher percentage of ceramic pieces of the first quality.

10
  • MATHEUS MARTINS MENDES
  • HORIZONTAL STRUCTURE AND MULTIPLE USE OF THE ARBOR COMPONENT OF AN AGROFLORESTAL SYSTEM IN MOACIR LUCENA, APODI, RIO GRANDE DO NORTE - BRAZIL

  • Líder : ALICE DE MORAES CALVENTE
  • MIEMBROS DE LA BANCA :
  • CARLOS JOSÉ DA SILVA
  • FABIANA PENEIREIRO
  • ALICE DE MORAES CALVENTE
  • Data: 30-jul-2019


  • Resumen Espectáculo
  • Agroforestry systems emerge as an alternative to the degradation of natural resources, as enable harmony between agriculture and forest species, guaranteeing environmental sustainability. The aim of this study was to analyze the horizontal structure, with focus on trees, of a Successional Agroforestry System located in Apodi- Rio Grande do Norte / Brazil and analysis the way of use of the species by the family agriculture. Ten plots of 20x20m were installed measuring adult trees with circumference at breast height (cbh) ≥ 6 cm, the usual parameters of phytosociology were evaluated: density, dominance, frequency, importance value index and diversity using the Mata Nativa software 4.0, as well as two meetings with the farming families of the settlement that manage the agroforestry system. 427 individuals were sampled, 18 species and 9 botanical families being considered a rich and biodiverse area when compared to other similar management areas in Caatinga and similar to areas preserved in biome. Cordia oncocalyx was the most present and consequently the most used by the farmers’ families for different purposes. 

11
  • SARAH ESTHER DE LIMA COSTA
  • Effect of contrasting environments on the basic density and mean annual increment of the clones eucalyptus wood

  • Líder : ROSIMEIRE CAVALCANTE DOS SANTOS
  • MIEMBROS DE LA BANCA :
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • ANA FLÁVIA NEVES MENDES CASTRO
  • GRAZIELA BAPTISTA VIDAURRE
  • Data: 29-nov-2019


  • Resumen Espectáculo
  • The basic density is considered one of the main technological properties of wood and is therefore, referred to as an indicator of quality. It can be influenced by how wood is formed during plant growth, which is determined by the edaphoclimatic conditions of the growth site. The aim of this work was to evaluate the influence of edaphoclimatic variables from 10 growing sites, distributed in the five regions of Brazil, on the basic density and the average annual increment of the wood of three eucalyptus clones at 4 years of age. To do so, we considered the edaphoclimatic variables (2012 to 2015), which are: precipitation, temperature, water vapor pressure deficit in air and soil water storage capacity and the production variables: basic density and increment annual average. To interpret the results, multivariate statistical analyses were adopted, with canonical correlation techniques, principal components and cluster analysis, in order to verify whether there were influences of each edaphoclimatic variable on the set of production variables, as well as formation of similar groups among each other. It was concluded that precipitation, temperature and vapor pressure deficit were the variables most correlated with the response variables of basic density and average annual increment of wood, whereas the variable water storage capacity in the soil did not correlate with the response-variables. In general, the different growth sites promoted divergent responses on the supply and quality of wood of eucalyptus clones.

12
  • LEOCLÉCIO LUÍS DE PAIVA
  • THE THINNING CHANGE PLANTING PRODUCTIVITY AND CONCENTRATION OF TANINS IN THE BARK OF Mimosa caesalpiniifolia Benth.?

  • Líder : TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • MIEMBROS DE LA BANCA :
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • ALEXANDRE SANTOS PIMENTA
  • THAÍS BRITO SOUSA
  • Data: 17-dic-2019


  • Resumen Espectáculo
  • Plants naturally produce compounds, which can be classified as primary and secondary. Primers are useful for plant growth and development. Vegetable tannins are secondary compounds produced for the defense of the vegetable. The search for new tannin producing species and the understanding of how external factors act in their production is a way of responding to how plants behave in the face of interference. Thus, the objective of this study was to evaluate the interference of thinning technique on wood and tannin yield of a homogeneous planting of Mimosa caesalpiniifolia Benth. 85 months old, located in Macaíba/RN. M. caesalpiniifolia Benth. It is an option for the sustainable obtaining of forest resources (loggers and non-loggers) in the Northeast. Measurements of dendometric variables were taken and ten plants were cut down, five from a thinned field and five from a field without the technique. The thinning happened in two moments, the first being done at 12 months and the second at 55 months after planting. The volume and mass of wood and bark, the moisture content and the calorific value of the wood and the tannin content were determined by the total solids content (TST), Stiasny index (I) and the content of condensed tannins (TTC). Drywood yield was 26.70 t/ha in no-till planting and 22.80 t/ha in grated. The percentage of dry husk mass for both plantations corresponded to 16%. The calorific value of the wood found was 4,160.91 kcal/kg. TST in thinning individuals was 8.57 and 7.12% in those without mechanical damage. The TTC for individuals submitted to thinning was 5.12%, and in those not submitted the value found was 5.21%. The only variable that presented significant difference was the I, with the values with and without thinning, 59.83 and 79.31%, respectively. Thinning alters I, and individuals not submitted to mechanical damage with the highest index. The thinning as it was conducted favored the emission of stems and increased the frequency of lower diameter classes, rather than favoring the increase in DBH.

2018
Disertaciones
1
  • PRISCILA LIRA DE MEDEIROS
  • Production and allocation of biomass and nutritional efficiency of a eucalyptus clone in function of population density, in the coastal region of RN

  • Líder : GUALTER GUENTHER COSTA DA SILVA
  • MIEMBROS DE LA BANCA :
  • GUALTER GUENTHER COSTA DA SILVA
  • SIDNEY CARLOS PRAXEDES
  • RENATO VINÍCIUS OLIVEIRA CASTRO
  • Data: 26-feb-2018


  • Resumen Espectáculo
  • In this experiment was evaluated the effect of different population densities on the production and allocation of biomass and nutritional efficiency of a eucalyptus clone. Twelve population densities were tested, varying from 498 to 13,333 plants per hectare. The evaluations were performed when the trees were 36 months old, determining the total biomass production and the biomass allocation per plant (kg plant-1) and per area (t ha-1), concentration, content and nutritional efficiency of N, P, K, Ca, Mg and S for the components leaves, branches, bark and wood. Data were submitted to analysis of variance and F test, and regression equations were adjusted. The values of total biomass and biomass of the wood per hectare decreased with the reduction of the density of plants, and the values of total biomass and wood biomass per plant increased with the reduction in population density. Proportional allocation of biomass to leaves and branches increased with decreasing plant density, while the proportional allocation of biomass to wood decreased. The highest aerial biomass production per plant (119.5 kg plant-1) was obtained in the density of 2,564 ha-1 trees. The highest density of plants, 13,333 ha-1 trees, provided the highest yield of total biomass (205.5 t ha-1) and wood (159.64 t ha-1) per unit area. With the reduction of population density, there was a linear increase in N and S content in the branches and wood and in the Ca content in the branches; increase in N content in leaves and N, Ca, Mg and S in the bark. The levels of P and K presented quadratic behavior as a function of population density. The content of macronutrients tended to decrease as the population density decreased. The wood was the component that presented the highest values of nutritional efficiency, which tended to decrease with reduction in plant density, with Ca being the only macronutrient that did not show effect in this last parameter. In general, the decrease of the density of plants caused increase in the concentration of some macronutrients, mainly in the bark. It caused reduction in the content and nutritional efficiency, mainly for the production of the wood.

2
  • KATARINE MARIA FREIRE DIESEL
  • Green corridors: floristic connecting urban reserves withing the Atlantic rainforest hotspot in Northeastern Brazil and the viability to create a botanic garden in Natal

  • Líder : LEONARDO DE MELO VERSIEUX
  • MIEMBROS DE LA BANCA :
  • LEONARDO DE MELO VERSIEUX
  • ALICE DE MORAES CALVENTE
  • FERNANDA ANTUNES CARVALHO
  • RUBENS TEIXEIRA DE QUEIROZ
  • Data: 27-feb-2018


  • Resumen Espectáculo
  • Considereing the relevance of the urban green areas to Natal city and the importance of the tree continuity for the biodiversity of these site, the present work aims to present an updated floristic listing for Conservation Units in the Atlantic Forest inserted in the municipality, and proposes the connection of these areas using green corridors. New records are reported for the flora the state of RN, and the proposed connection between the preservation areas occurs over an area of approximately 2,000 ha, comprising seven neighborhood in the southern part of the city.

3
  • AÉCIO DANTAS DE SOUSA JÚNIOR
  • ANALYSIS OF THE DOCUMENT OF FOREST ORIGIN "DOF": COMMERCIALIZATION OF NATIVE FOREST PRODUCTS LEGALIZED IN THE STATE OF RIO GRANDE DO NORTE

  • Líder : JULIANA LORENSI DO CANTO
  • MIEMBROS DE LA BANCA :
  • JULIANA LORENSI DO CANTO
  • JOSE AUGUSTO DA SILVA SANTANA
  • ALLYSON ROCHA ALVES
  • Data: 27-feb-2018


  • Resumen Espectáculo
  • The Document of Forest Origin “DOF” is a mandatory document to control and monitor the transportation of products and by-products of native forest origin, which must accompany the transport and storage of the native products traded at all times. The objective of this work is to analyze the public data of the DOF system generated in the period from 2011 to 2016 and to identify and quantify legalized native forest products marketed and transported in the state of Rio Grande do Norte. The data used were made available by the Brazilian Institute for the Environment and Renewable Natural Resources (IBAMA) and correspond to all transport of forest products of native and legalized origin, with final destination of the municipalities of the RN in the period from 2011 to 2016. Rio Grande North between the years 2011 to 2016 received timber products from 24 states of the country, with highlights to the northern states. The number of DOFs originating in the NB had an average growth of 22% between the years 2011 to 2014 and a reduction of 13% in 2015 and 2016 and commercialization and between municipalities transportation were observed in more than 90% of the municipalities. In relation to the species transported in the evaluation period, the movement of 738 different wood species was observed, especially the Angelim-red (Dinizia excelsa), Maçaranduba (Manilkara spp.) and Jatobá (Hymenaea spp.). The main products transported in the state were: Lumber, Firewood and Wood Residues. The analysis of the DOF shows that there have been advances for the native products traded and that most of the products marketed and transported in the RN originate in the Northern states.


4
  • EDUARDO DE SOUZA ARAÚJO
  • Antibacterial and antifungal activity of pyroligneous acid from wood of Eucalyptus urograndis and Mimosa tenuiflora

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • FRANCISCO MARLON CARNEIRO FEIJÓ
  • NILZA DUTRA ALVES
  • Data: 28-feb-2018


  • Resumen Espectáculo
  • The present work aimed to evaluate the antibacterial and antifungal activity of two types of pyroligneous acid (PA) obtained from slow pyrolysis of wood of Mimosa tenuiflora and of a hybrid of Eucalyptus urophylla x Eucalyptus grandis. Wood wedges were carbonized on a heating rate of 1.25°C/min until 450°C. Pyrolysis smoke was trapped and condensed to yield liquid products. Crude pyrolysis liquids were bi-distilled under 5 mmHg vacuum yielding purified PA. Multi-antibiotic resistant strains of Escherichia coli, Pseudomonas aeruginosa (ATCC 27853) and Staphylococcus aureus (ATCC 25923) had their sensitivity to PA evaluated by using agar diffusion test. Two yeasts were evaluated as well, Candida albicans (ATCC 10231) and Cryptococcus neoformans. GC-MS analysis of both PA’s was carried out in order to obtain their chemical composition. Regression analysis was performed and models were adjusted, with diameter of inhibition halos and PA concentration (100, 50 and 20%) as parameters. Identity of regression models and equality of parameters in polynomial orthogonal equations were verified. Inhibition halos were observed in the range 15 to 25 mm of diameter. All microorganisms were inhibited by both types of PA even in the lowest concentration of 20%. The feasibility the usage of PAs produced with wood species planted in large scale in Brazil was evident and the real potential as a basis to produce natural antibacterial and antifungal agents, with real possibility to be used in veterinary and zootechnical applications.

5
  • SARAH PATRÍCIA LIMA NUNES
  • Test of strong normal seedlings of Enterolobium contortisiliquum, Pityrocarpa moniliformis and Poincianella pyramidalis

  • Líder : MAURO VASCONCELOS PACHECO
  • MIEMBROS DE LA BANCA :
  • MAURO VASCONCELOS PACHECO
  • MARCIO DIAS PEREIRA
  • KATIANE DA ROSA GOMES DA SILVA
  • Data: 28-feb-2018


  • Resumen Espectáculo
  • In order to complement the information obtained by the germination test, the tests used to evaluate seed vigor, which are classified as physical, physiological, biochemical and resistance to stress. Inserted in the physiological tests, the seedling vigor classification test for the evaluation of seed lots has been little used, mainly with native forest species. Therefore, the objective of this study was to characterize the seedlings of Enterolobium contortisiliquum, Pityrocarpa moniliformis and Poincianella pyramidalis in relation to morphological aspects and to use them as specific parameters for the test of vigor classification of seedlings. The study was divided into three distinct stages: morphological characterization of the species, carried out from the germination test; physiological characterization of seed lots, through vigor tests; and seedling vigor classification, where the results obtained in the physiological tests were correlated with the percentage of normal seedlings "strong" obtained in each seed lot. The results showed that there was a difference in the physiological quality of the seeds of E. contortisiliquum, P. moniliformis and P. pyramidalis, and that the parameters adopted in the morphological characterization of strong normal seedlings were efficient in the classification of seeds vigor for the species under study.

6
  • ANA CAROLINA DE CARVALHO
  • ENERGY POTENTIAL OF WOOD OF FOREST SPECIES IN AREA UNDER SUSTAINABLE MANAGEMENT, AFTER RAPID CUTTING, IN RIO GRANDE DO NORTE

  • Líder : ROSIMEIRE CAVALCANTE DOS SANTOS
  • MIEMBROS DE LA BANCA :
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • ANANIAS FRANCISCO DIAS JÚNIOR
  • RENATO VINÍCIUS OLIVEIRA CASTRO
  • Data: 12-nov-2018


  • Resumen Espectáculo
  • The State of Rio Grande do Norte has considerable dependence on wood from the Caatinga, used as an energy resource in the home and industrial sectors. Studies on the productive potential of wood in forest stands of native species, which in turn involve not only wood productivity but also the technological characteristics of wood, help to understand the dynamics and potential of these stands, especially the quantity of available energy in fields after exploration. The objective of this work is to evaluate wood production and wood quality for energy, in an area under sustainable forest management, in the State of Rio Grande do Norte (Brazil), after shallow cut, in addition to estimating age of rotation of the stand. The selected area is located 100 km away from the capital of the RN, at Fazenda Milha / Poço da Pedra, municipality of João Câmara / RN. It has a managed area equivalent to 1,132.78 ha of native Caatinga forest and is nowadays the area with the longest period under forest management registered in the State of the RN. From the total of 15 plots, four were selected with their respective cutting ages, namely: Field 1 (T1): 12.3 years; Field 8 (T8): 9.3 years; Field 12 (T12): 7.2 years and Field 6 (T6): 6.6 years of cutting. Ten rectangular plots (20 m x 20 m) were casually cast, making a total of 40 points for the development of the study. In these, the trees with diameter at the breast height (DBH) of at least 1,9 cm (CAP ≥ 6 cm) were identified and after the species identification the DBH and the total height of the trees were identified. After analyzing the inventory of the 40 plots distributed in the four plots, those species were selected, which, together, represented at least 70% of the stands. From each selected species, three sample trees were felled, and the samples were then sampled at chest height (1.30 m) for determination of the basic density and upper calorific value of the wood, in accordance with ABNT NBR 11941 (ABNT, 2003) and ABNT NBR 8633 (ABNT, 1984), respectively. In order to estimate the wood volume of each plot, the average shape factor calculated by the cubage of the selected trees was applied and then the average production per hectare was estimated. After the cut in each plot, the cutting age (rotation age) of the area under study was estimated. It was concluded that 24 tree species occurred in the four plots studied and that seven species in 13 different classes of CAP were more representative and that together reflect 90% of the index value of importance of the stand. It was possible to adjust growth and yield curves to estimate future production, using estimates of production at different points in time of the studied plots. It is recommended to cut the forest when it has 17.3 years of regeneration. The wood production stood out in block 1, the oldest with 12.3 years of cutting. The quality of the wood for energy as well as the amount of energy stored in the study area will be estimated after the analysis of the quality of the wood.

7
  • LUCIO CESAR DANTAS DE MEDEIROS
  • EFFECT OF PYROLYSIS HEATING RATE ON CHEMICAL COMPOSITION OF WOOD VINEGAR FROM Eucalyptus urograndis) AND Mimosa tenuiflora

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • PEDRO NICÓ DE MEDEIROS NETO
  • RENATA MARTINS BRAGA
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • Data: 29-nov-2018


  • Resumen Espectáculo
  • Among the parameters used on the biomass carbonization process,the heating velocity presents itself as 
    one of the most important. In face of it, the purpose of this study was to evaluate the influence of
    different heating velocities on the gravimetric yields in charcoal, condensable fluids and non-condensable
     gases. The eucalyptus (Eucalyptus urophylla x grandis) and black jurema (Mimosa tenuiflora) woods were
    used, shaped as disks with variable diameters and dried. The carbonization occurred in a muffle type
     electric oven for three distinct heating velocities: 1.46, 0.97 and 0.73 °C/min.
    The BioEstat software version 5.3 was employed to perform the normality test and Shapiro Wilk,
    and subsequently the averages were compared by Tukey's test to the 5% significance level.
    The collected pyrollenous extract was analyzed by gas chromatography coupled to the mass spectrum ]
    (GC-MS). The results showed that smaller heating velocities produce bigger yields in charcoal,
    while higher heating velocities lead to bigger yields in condensable fluids.
    As well as the increase of the heating rate increased the content of furans and pyran and
    decreased the content of phenolic compounds. With this, it is concluded that the choice of
    the heating rate should be carried out according to the main interest of the production.
8
  • JOSENILDA APRIGIO DANTAS DE MEDEIROS
  • MORFOLOGY OF SEEDS OF Amburana cearensis (ALLEMÃO) A. C. SMITH APPLIED TO THE ANALYSIS OF SEED VIGOR

  • Líder : SALVADOR BARROS TORRES
  • MIEMBROS DE LA BANCA :
  • SALVADOR BARROS TORRES
  • MARCIO DIAS PEREIRA
  • MARCOS VINICIUS MEIADO
  • Data: 18-dic-2018


  • Resumen Espectáculo
  • The test of vigor of seedlings applied in the classification of seed lots has been little used, mainly with regard to the native forest species. Thus, the objective of this research is to characterize the morphological aspects of seedlings of Amburana cearensis and to use them in the classification of vigor of seed lots. To characterize seedlings of A. cearensis regarding the morphological aspects and to use them for the classification of vigor of seed lots. The study will be divided into three stages: morphological characterization of seedlings; classification of seedling vigor and physiological characterization of seed lots. For the classification of vigor of seedlings, the percentage of normal "strong" seedlings was correlated with the results of the tests of the physiological characterization. For this was carried out tests germination, emergence, first germination and emergence counts, germination speed index, emergence speed index, tetrazolium, length and dry mass of seedlings. The experimental design was completely randomized. Tho the Tukey's test was used for the parametric data, and the Kruskal-Wallis test was used for the non-parametric variables. For the correlation between the variables that determine the vigor of the lots, was used Spearman. The analyzes were performed with the statistical software Bioestat 5.0.  The seeds of A. cearensis have a mean length of 14.12 mm, mean width of 9.53 and average thickness of 4.6 mm; oblong shape and presence of wing, papyraceous and transparent type. Opposite the wing is observed the hilum and the micropyle. The embryo is axial composed of two fleshy cotyledons, straight and conical axis with barely visible plumule. The seedlings of A. cearensis are semi-hypogean phanerocotylar, with emission of the primary root on the fourth day and presence of normal seedlings on the ninth day after sowing. From the morphological characterization of the seedlings it was possible to classify the seedlings into strong and weak and abnormal normal ones. Seedlings vigor test did not classify the physiological quality of seed lots efficiently, but the normal seedlings length was efficient in vigor classification.

9
  • KYVIA PONTES TEIXEIRA DAS CHAGAS
  • GENETIC DIVERSITY AND PREDICTIVE DISTRIBUTION MODELING OF Mimosa tenuiflora (Willd) Poiret

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • CRISTIANE GOUVEA FAJARDO
  • DANIELE APARECIDA ALVARENGA ARRIEL
  • FABIO DE ALMEIDA VIEIRA
  • MURILO MALVEIRA BRANDÃO
  • Data: 20-dic-2018


  • Resumen Espectáculo
  • Mimosa tenuiflora (Fabaceae), known as jurema-preta, has high economic and ecological potential. It is widely used as firewood for the production of red ceramics. Due to the high development capacity in compacted soils, people considered the species an indicator of the initial stages of succession and the recovery of the forest cover. The objective of the study was to evaluate the genetic diversity in natural populations and to predict climatically adequate areas for the occurrence of M. tenuiflora in a climate change scenario. We sampled fifteen natural populations in the state of Rio Grande do Norte, totaling 225 individuals, obtaining diversity indexes and genetic structure by means of 70 ISSR (Inter Simple Repeat Intervals). The maximum entropy algorithm (Maxent) was used in the modeling of the distribution of the species, with the use of geographic occurrence points and 19 bioclimatic variables. The genetic diversity of Nei and the Shannon index presented averages of 0.21 (± 0.02) and 0.35 (± 0.03), respectively. The most genetically diverse populations were ACU (Assú), CRV (Caiçara do Rio do Vento) and MAR (Martins), and the least diversified was CAR (Caraúbas). These populations showed significant population decreases in the infinite allele model and should be a priority for conservation. Bayesian analysis indicated the formation of four groups with the greatest genetic differentiation, with ESP (Espirito Santo) being the most differentiated, explained by the genetic discontinuity with the other populations. We selected eleven bioclimatic variables for the distribution models of the species after multicollinearity analysis. Modeling for the present period presented AUC (area under the curve) of 0.94 (± 0.02), indicating good fit of the model used. For the future period (2070), the AUC value ranged from 0.87 to 0.88. The highest percentage of contribution was for the annual precipitation variable (58.3%). The areas of suitability occurred in greater intensity and almost completely in the states of Ceará and Rio Grande do Norte. In relation to the predictions of the future, the territory with high adequacy presented a reduction ranging from 30.9% to 59.4%. The results obtained can contribute as a subsidy for the establishment of commercial plantations, and in the definition of management and conservation strategies.

2017
Disertaciones
1
  • JEANNE RAQUEL DE ANDRADE FRANCO
  • Intraspecific interaction and abiotic characterization in mangrove area influenced by shrimp farming
  • Líder : SIDNEY CARLOS PRAXEDES
  • MIEMBROS DE LA BANCA :
  • DIOGENES FELIX DA SILVA COSTA
  • JOSÉ ESPÍNOLA SOBRINHO
  • SIDNEY CARLOS PRAXEDES
  • Data: 14-feb-2017


  • Resumen Espectáculo
  • Mangroves are ecosystems coastal and estuarine belonging to warm temperate and wet tropics, mangroves are dominated by woody species, provide important ecosystem goods and services and have socioeconomic value. Mangroves are sensitive to disturbances and are constantly being degraded due to urban development. Interactions between plant individuals may result in competition and facilitation by interfering with the pattern of distribution, plant growth and survival, besides modifying physical-chemical characteristics of the environment. Abiotic and biotic variables interact allowing the analysis of the adaptation of the species in different environmental conditions and also infer about the intensity of degradation. The main objective of the study was to identify the main limiting factors on the growth and survival of Rhizophora mangle L. (Rhizophoraceae) plants in two intraspecific environments located in the shrimp farming area, one with trees and closed canopy, and another open with young and sub-shrub plants. Two monitoring were carried out with selection of plots and plants in each environment, totaling 90 individuals, to quantify the growth by means of measures of height, number of branches and diameter at 30 cm of the soil for 16 months. For the abiotic variables, measurements of soil temperature and pH, luminosity, salinity, air velocity and temperature and soil penetrability were taken in the plots of each open and closed environment for 12 months. Adult individuals of Rhizophora mangle were intraspecific competitors interfering in the growth of young plants of the same species through the limitation of light and of the stress coming from the accumulation of sediments. In the open environment, with young plants presenting the same age and distributed in an aggregated way, facilitation occurred with reduction of stressful conditions due to the higher incidence of solar radiation and temperature of this environment, and also competition through high density of plants. Due to these positive and negative interactions acting simultaneously, the final effect of density dependence on plant growth of the open environment was neutral. However, mean temperatures of 30 ° C, soil pH values between 5.5 and 6.5 and salinity with about 35 ppm were factors that benefited the growth of the plants over time in open environment through photosynthesis, of physiological adaptations and possible better assimilation of soil nutrients. These results helped to understand the environmental aspects that facilitate the recovery of areas degraded by shrimp farming.

2
  • JÉSSICA RITCHELE MOURA DOS SANTOS
  • ECOLOGICAL NICHE MODELING AND GENETIC DIVERSITY OF Copernicia prunifera (Miller) H.E. Moore (ARECACEAE): IMPLICATIONS FOR CONSERVATION

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • CRISTIANE GOUVEA FAJARDO
  • FABIO DE ALMEIDA VIEIRA
  • MURILO MALVEIRA BRANDÃO
  • Data: 15-feb-2017


  • Resumen Espectáculo
  • Copernicia prunifera (Miller) H.E. Moore is a native palm tree from northeastern Brazil, it has multiple forms of use, its main product being the ceriferous powder. Due to the extractivism carried out over the years in the natural populations of the species, studies on the geographical distribution and genetic diversity of their populations are increasingly necessary. The present study aimed to study the geographic distribution of Copernicia prunifera as a basis in ecological niche modeling (MNE) and to analyze the genetic diversity among natural populations of the species. The ecological niche models were constructed based on 80 species occurrence points and on 19 environmental variables. The results suggest that the potential distribution model of Copernicia prunifera was concentrated in the states of Ceará, Rio Grande do Norte, southwest of Pernambuco, north of Bahia and the valley of the São Francisco River, north and southwest of Piauí and north of Maranhão. The environmental variable that contributed most to the MNE was the rainfall of the driest quarter. In the study of genetic diversity 180 individuals were sampled in 11 natural populations in the states of Rio Grande do Norte and Ceará. Seven ISSR primers were used and provided 100 locus with 99.09% polymorphism. The Polymorphic Information Content (PIC) of each primer was considered to be medium to informative. The genetic diversity of Nei (He) ranged from 0.071 to 0.288 and the Shannon Index (Ho) ranged from 0.103 to 0.418. AMOVA indicated greater genetic variation among individuals within populations (58.11%) than among populations (41.89%). The Mantel test revealed a positive and significant correlation (r = 0.423; P = 0.006) between the genetic and geographic distances, suggesting isolation by distance. The highest value of gene flow occurred among the populations of AR1 and AR2 (Nm = 29), as well as the greatest genetic similarity. Bayesian analysis revealed that the genotypes were divided into three distinct groups (K = 3). Most populations presented genetic bottleneck populations. Most populations presented genetic bottleneck populations. The results suggest that the populations of Copernicia prunifera are reducing their genetic diversity, being necessary measures of conservation of their populations in order to minimize the loss of important alleles, contributing to the maintenance of the species.

3
  • MILENY GALDINO DA SILVA
  • Growth, production and distribution of biomass of forest species in response an two farming methhods in the Macaíba, RN

  • Líder : GUALTER GUENTHER COSTA DA SILVA
  • MIEMBROS DE LA BANCA :
  • GUALTER GUENTHER COSTA DA SILVA
  • RENATO VINÍCIUS OLIVEIRA CASTRO
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • Data: 15-feb-2017


  • Resumen Espectáculo
  • The knowledge about and productive potential of forest species should contribute significantly as basis for the proposition of action sthat allow a correct restoration or conservation. Contributing to an appropriate planning of the exploitation of particular area and conservation of ecosystems, which contributes to a sustainable production of their products. This study aimed to evaluate growth, production biomass distribution of three acácia (Acacia mangiumWilld), neem (Azadirachta indica A. Juss) and sabiá (Mimosa caesalpiniae folia Benth) the 3 and 4 years of age, in response an two farming methods. The experimental design was a randomized block factorial two treatments, less intensive and more intensive, and four repetitions, total in eight installments. Being the eight parcels of 576 m ² (24 x 24), with spacing between plants of 3x3 m, being 64 plants/plotand useful portion of 36 plants. In the treatment with more intensive cultivation was used bovine manure (4.0 t/ha), super triple (146.0 kg/ha) distributed in furrow sand calcareous (2.0 t/ha) and NPK (6-30 -6:100 g/plant), in pits side. All treatment more intensive was applied NPK (6-30 -6:100 g/plant), in pits side. The growth feach tree was obtained by measuring the height (m) and diameter (cm). From these data were calculated the basal area (m2/ha), cylindrical volume (m3/ha), actual volume (m3/ha) and stacked volume (st/ha). To obtain the of the aerial part biomass average tree was felled, and its components (leaves, twigs, barkandwood) separated, weighed and dried, yielding fresh and dry biomass. Inall the studied variables showed different behaviors, where treatment more intensive had greater influence in thegrowth, production and amount of biomass. The soil preparation, in the line of planting, along with the fertilizer foundation, positively influences growth and volume production of species acácia, nem and sabiá. Emphasizing as well the importance of appropriate soil management for the initial growth of the three species.

4
  • DANIELLE DE MORAES LÚCIO
  • EFFECT OF UREA ADDITION ON PROPERTIES OF PHENOLIC ADHESIVES PRODUCED WITH EUCALYPTUS SP. PYROLYTIC OIL

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • RENATO VINÍCIUS OLIVEIRA CASTRO
  • Data: 16-feb-2017


  • Resumen Espectáculo
  • The present work aimed to evaluate the effect of the addition of urea on properties of phenolic adhesives produced with oil from pyrolysis of Eucalyptus sp. Adhesives formulations were synthesized involving two formaldehyde/demethylated oil (F/DO) molar ratios (1.4 and 1.7), three NaOH/DO molar ratios (0.9, 1.0 and 1.1) and five levels of urea (0, 5, 10, 15 and 20%). For all synthesized adhesives, the following properties and parameters were obtained: solids content (%), gel time (s), viscosity (cP), pH, reaction time (min) and temperature (°C). Experimental data were subjected to quadratic regression analysis and models were adjusted for some adhesives properties and reaction conditions (time and temperature). Then tests were performed to verify the identity of regression models and equality of parameters. The simple correlation test indicates that there was influence in the percentages of urea in the adhesive properties. As urea levels increased, the gel time, reaction time, and temperature increased likewise. Better control of the synthesis could be obtained, avoiding the possibility of sudden gelatinization. As a conclusion, the synthesis reactions are more controllable under the following conditions: addition of urea in concentrations ranging from 5 to 10% with F/OD molar ratio of 1.7 and NaOH/OD molar ratio of 0.9.

5
  • RICHELIEL ALBERT RODRIGUES SILVA
  • REPRODUCTIVE ECOLOGY, GENETIC DIVERSITY AND MATING SYSTEM OF Copernicia prunifera (ARECACEAE)

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • CRISTIANE GOUVEA FAJARDO
  • FABIO DE ALMEIDA VIEIRA
  • MURILO MALVEIRA BRANDÃO
  • Data: 16-feb-2017


  • Resumen Espectáculo
  • The present study aimed to describe the reproductive characteristics of the palm Copernicia prunifera, investigating the genetic diversity and the system of reproduction of a natural population by using ISSR markers in the state of Rio Grande do Norte, Brazil. In relation to the characterization of reproductive structures, pollen viability and reproductive phenology of Copernicia prunifera, observed that the inflorescences are made up of multiple flowers hermaphroditic, with light coloration. In addition, the flowers are composed of 3 sepals, 3 petals, 6 stamens and 3 carpels. The average percentage of viable pollen was 62%. Additionally, there are differences in the reproductive phenophases between populations evaluated, being observed continuous activity in the production of flowers and ripe fruit in the population of Parnamirim, and discontinuous observation in the Macaíba population. The markers used to analyze the genetic diversity and reproductive system of Copernicia prunifera were usually informative and presented high polymorphism. The values of the indices of diversity among the adults and the progenies did not differ statistically (He = 0.319 and I = 0.470; He = 0.337 and I = 0.505), respectively. In the what-if analysis for detection of genetic bottleneck, IAM models (infinite alleles) and SMM (steps of mutations), all subjects presented population reduction, in addition to deficit of heterozygosity (P < 0.0001). Outcrossing rates in population level (n = 247) pointed multilocus outcrossing rate (tm) of 0.878 and single locus outcrossing rate (ts) of 0.738, indicating that the Copernicia prunifera is a species of mixed mating system, and preferentially alogamous. The mating among relatives rate (tm - ts) has been reduced, indicating low outcrossing between closely related individuals. The fixation index between seed tree (F) was negative (- 0.200), pointed to the absence of inbreeding. The correlation of selfing (rs) showed high value (0.914). The results found in this study generated information on the reproductive ecology of the specie, but also to adopt management strategies, conservation and genetic improvement of palm Copernicia prunifera.

6
  • GUILHERME VINICIUS GONÇALVES DE PÁDUA
  • VIABILITY AND VIGOR OF Acacia mangium WILLD. SEEDS IN DIFFERENT STORAGE ENVIRONMENTS 


  • Líder : MAURO VASCONCELOS PACHECO
  • MIEMBROS DE LA BANCA :
  • MAURO VASCONCELOS PACHECO
  • MARCIO DIAS PEREIRA
  • RISELANE DE LUCENA ALCÂNTARA BRUNO
  • Data: 16-feb-2017


  • Resumen Espectáculo
  • The primary challenge of seed storage is the maintenance of the physiological quality obtained from harvest to sowing. The main environmental factors that affect seed quality during this period are the temperature and the relative humidity of the air. The objective of this research was to evaluate the physiological and biochemical changes in Acacia mangium seeds in different storage environments. For this purpose, the seeds were stored in semipermeable polyethylene bags under three conditions: freezer (T = -20 ± 3 ° C, RH = 49%), domestic refrigerator (T = 6 ± 3 ° C, RH = 55%) and heated room T = 27 ± 4ºC, RH = 56%), with evaluations performed in the periods of 0 (control - initial quality before storage), 3, 6, 9, 12 and 15 months. For each evaluation period, the following determinations and tests were performed: water content (%), germination (%), first germination count (%), germination speed (VG), seedling dry mass %), Mean time of emergence (TME-days), total soluble sugars (μmol of AST g-1 MS), non-reducing sugars (μmol of ANR g-1 MS), total free amino acids (μmol of AALT g-1 MS ), Starch (mg g-1 seed glucose) and soluble proteins (mg g PS-1 MS). The experimental design was completely randomized, organized into a subdivided plots scheme, the main plot being the environment (3 levels) and the subplots, storage periods (6 levels). Four replicates of 100 seeds were used for the physiological variables and 5 replicates of 15 seeds (± 200 mg) for the biochemical variables. Seeds of A. mangium remained viable for 15 months and vigor for 12 months when stored in a freezer (T = -20 ± 3 ° C, RH = 49%), domestic refrigerator (T = 6 ± 3 ° C, RH = 55%). And air-conditioned room (T = 27 ± 4ºC, RH = 56%). The changes of physiological quality reduction in A. mangium seeds during short-term storage (6 months) is more pronounced for those kept in the freezer (T = -20 ± 3ºC, U.R. = 49%). For all the conditions tested, the decrease of the starch, AST and ANR contents throughout the storage is not clearly observed. In the 3 environments tested there was an increase in the contents of PS and AALT throughout the storage. It was not possible to explain physiological changes between the 3 storage conditions by carbohydrate reserve degradation mechanisms.

7
  • JULIANA SOARES DA SILVA
  • GROWTH AND DISTRIBUTION OF FINE ROOTS OF Acacia mangium UNDER TWO FARMING SYSTEMS

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • GUALTER GUENTHER COSTA DA SILVA
  • ERMELINDA MARIA MOTA OLIVEIRA
  • RENATO VINÍCIUS OLIVEIRA CASTRO
  • Data: 16-feb-2017


  • Resumen Espectáculo
  • Knowledge about the root system, especially the behavior of the fine roots in different management conditions, is important to understand the physiological behavior of the aerial part of the tree. Acacia mangium has been used for forestation and reforestation due to its rapid growth and good development in soils with low water and nutritional availability. The objective of this study was to study the growth and distribution of fine roots of Acacia mangium under two farming methods after 12 and 48 months of age. The experimental design was a randomized block design with two cultivation methods (A = less intensive and B = more intensive) and four replicates considering three positions (L-row, E-between the rows and D-diagonal) and three depths (0- 20, 20-40, 40-60). In both treatments the highest density of fine roots was found in the superficial layer of the soil (0 to 20 cm), tending to reduce with depth from 12 months to 48 months of age. The addition of bovine manure, triple superphosphate, limestone and the performance of the furrows did not favor the production and vertical distribution of fine roots.

8
  • JOÃO ANTÔNIO VIEIRA DOS REIS
  • EVALUATION OF Moringa oleifera LAM. SEED VIGOR, INCLUDING A COMPUTER ANALYSIS OF IMAGES (SAPL)

  • Líder : MARCIO DIAS PEREIRA
  • MIEMBROS DE LA BANCA :
  • ANDRESSA VASCONCELOS FLORES
  • CIBELE DOS SANTOS FERRARI
  • MARCIO DIAS PEREIRA
  • Data: 17-feb-2017


  • Resumen Espectáculo
  • The use of techniques involving a computerized analysis of seedlings in the evaluation of seed lots quality has shown a great efficiency. Them, the aim of this work was to verify the efficiency of Seedling Analysis System (SAPL) in the detection of vigor differences between moringa seed lots in comparison to information provided by usual vigor tests. Therefore, water content and the physiological quality of seeds by germination test, first count test, germination speed index, emergency speed index, usual accelerated aging test, and accelerated aging test using saline solution were determined, as the use of SAPL. The experimental design was completely randomized using four replicates. The parameters obtained in the computerized analysis (shoot and primary root lengths, seedling total length, and growth, uniformity, and vigor index) as the SAPL software were efficient to distinguish seed lots in comparison to usual tests, not only among lots showing low and high vigor, but also to those showing intermediate quality.

9
  • HELOISE ANDRIELLY NASCIMENTO COSTA
  • PHYTOOSOCIOLOGICAL CHARACTERIZATION OF A DECIDUAL SEASONAL FOREST FRAGMENT RELATED TO THE ALTITUDE GRADIENT IN MACAÍBA / RN

  • Líder : PAULO ROGERIO SOARES DE OLIVEIRA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE FADIGAS DE SOUZA
  • LEONARDO BEZERRA DE MELO TINOCO
  • MALCON DO PRADO COSTA
  • SIDNEY CARLOS PRAXEDES
  • Data: 20-feb-2017


  • Resumen Espectáculo
  • The delimitation of Deciduous Forests should be done including several aspects, such as soil, relief and vegetation. In the Brazilian Northeast, the Decidual Seasonal forest occurs in a contact zone between the Caatinga, the Cerrado and the Atlantic Forest, being narrow and transitional bands. In the RN there is a forest versatility between these ecosystems. The altitude variation is an important factor of changes in vegetation patterns, however not deeply studied in national and local forests. The study was carried out in an area of deciduous forest in the county of Macaíba, which was divided into 4 zones with a difference of 19 m of altitude between them, floristic and phytosociological data were collected. A total of 449 individuals distributed in 69 species, 49 genus and 36 families were inventoried.  Fabaceae family was the most representative one with 11 species and 164 individuals, followed by Myrtaceae (10 species and 98 individuals) and Malpighiaceae (4 species and 10 indivisuals). Chamaecrista ensiformis (Vell.) H.S. Irwin & Barneby, Guapira laxa (Netto) Furlan e Zanthoxylum syncarpum Tul species obtained the higher indexes Fr: 50, 45 e 50 e  VI:  25,11%; 17,09% e 19,58%  , repectively.  No species occurred along the entire gradient, with a constant input and output of taxa, DCA values was -0,851 e -6,8794, the indexes de of J’0,8432 , (C) 0,9533 E  H’3,532;  C2 presented the best values for all analyzed indexes evidencing an excellent stage of conservation and phytosanation related to the Atlantic Forest. Ci and C4 in spite of the distance they present Phytophysiognomy of Caatinga and Cerado; While C3 presents taxa of wide distribution among the national biomes. Thus a significant dissimilarity in the vegetative structure is observed in a smooth and continuous way.

10
  • JÉSSICA MAYARA HIPÓLITO DE ARAÚJO
  • Seaweeds as biostimulants for the initial growth of Caatinga tree species
  • Líder : CRISTIANE ELIZABETH COSTA DE MACEDO
  • MIEMBROS DE LA BANCA :
  • EDUARDO LUIZ VOIGT
  • SIDNEY CARLOS PRAXEDES
  • THIAGO BARROS GALVAO
  • Data: 23-feb-2017


  • Resumen Espectáculo
  • Several studies have demonstrated the beneficial effects of applying algae to plants, including improved germination and plant establishment. Despite some examples of commercial use, almost all of the algae biomass is not explored by population. Considering its high nutritional value, there is a great potential for the commercial use. Therefore, in order to contribute to the development technologies for use of algae in the production of seedlings for reforestation and sustainable exploitation, we analyzed the effects of algae collected in the coast of the Rio Grande do Norte in the initial growth of native species of Caatinga. Different concentrations (0, 15, 20, 25, 30, 35 and 40 g kg-1) of seaweed powder (SP) were tested with a prepared substrate containing clay, bovine manure and sand in Caesalpinia ferrea Mart species. Ex Tul and Poincianella pyramidalis Tul. The most significant results were the stimulation in the absolute growth rate at higher doses for P. pyramidalis and intermediates for C. ferrea at 60 days after sowing (DAS). At 120 DAS, we observed a slight stimulus in the increase of biomass of the roots and diameter of the stem in C. ferrea in relation to the increasing doses of SP. In this species there was also an increase in the concentration of chlorophylls a and b and carotenoids. The increase in the concentration of pigments in relation to SP doses also occurred in P. pyramidalis

11
  • SANIELY MARIA BEZERRA DE MELO
  • Physiological and oxidative alterations during storage of Moringa oleifera Lam seeds

  • Líder : EDUARDO LUIZ VOIGT
  • MIEMBROS DE LA BANCA :
  • EDUARDO LUIZ VOIGT
  • MAURO VASCONCELOS PACHECO
  • THIAGO BARROS GALVAO
  • Data: 23-feb-2017


  • Resumen Espectáculo
  • Oxidative damage plays a central role in seed deterioration during storage. In this sense, the current work aimed at characterizing seed viability and vigour as well as oxidative damage and protection through the storage of Moringa oleifera Lam. (moringa) seeds. Seed samples were transferred to semipermeable plastic bags and stored in a growth chamber (27 ± 2ºC and 65% RH) and in a refrigerator (4 ± 2ºC and 25% RH) for 18 months. Harvests were carried out after seed processing and every 3 months in the course of storage. Water content, germination percentage, germination speed index (GSI), abnormal seedling percentage, K+ leakage, H2O2 content, lipid peroxidation, protein carbonylation, reduced ascorbate (AsA) content, in addition to the activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), phenol peroxidase (POX) and catalase (CAT) were evaluated. The decrease of germination percentage and GSI associated with the increase of K+ leakage and abnormal seedling percentage was more intense in the seeds maintained in the growth chamber than in those maintained under refrigeration during 18 months. Lipid peroxidation remained unchanged, H2O2 content and POX activity decreased while protein carbonylation, AsA content and SOD, APX, and CAT activities increased over time, regardless of the storage environment. Therefore, viability and vigour of moringa seeds were better preserved under refrigeration at low RH for a maximum period of 12 months. Quality loss beyond this period might not be attributed to H2O2 accumulation and lipid peroxidation, but it could involve protein oxidation. The preservation of AsA content and SOD, APX and CAT activities seems insufficient to maintain the viability and vigour of moringa seeds after 12 months of storage.

12
  • DANILO FLADEMIR ALVES DE OLIVEIRA
  • Involvement of hydrolytic reactions in the deterioration of Moringa oleifera Lam. seeds during storage

  • Líder : EDUARDO LUIZ VOIGT
  • MIEMBROS DE LA BANCA :
  • EDUARDO LUIZ VOIGT
  • SIDNEY CARLOS PRAXEDES
  • THIAGO BARROS GALVAO
  • Data: 24-feb-2017


  • Resumen Espectáculo
  • The aim of this work was to investigate the deterioration of Moringa oleifera Lam. (moringa) seeds during storage under controlled conditions. Seeds were conditioned in semipermeable plastic bags and stored in a growth chamber (27 ± 2ºC and RH 65%) and in a refrigerator (4 ± 2ºC and RH 25%) for 18 months. Harvests were performed prior to storage and every 3 months. Water content, germination percentage, mean germination time, seedling length and dry weight, and content of neutral lipids, starch, soluble proteins, total soluble sugars, non- reducing sugars, and total free amino acids, as the activity of lipases, amylases and acid proteases were evaluated. Water content, viability, and vigor remained unchanged, as well as the content of neutral lipids, starch, total soluble sugars, non-reducing sugars, and total free amino acids did not decrease in the seed stored under refrigeration during 12 months. The content of soluble proteins decreased progressively over time, regardless of the storage environment.  Viability and vigor loss was accompanied by a decrease in the content of neutral lipids, soluble proteins, total soluble sugars and non-reducing sugars and an increase in the activity of lipases and acid proteases in the seeds stored in the growth chamber and in the refrigerator. The role of enzymatic and non-enzymatic hydrolysis in deterioration of food reserves during natural aging is discussed. For cultivation purposes, moringa seeds should be stored under refrigeration at low relative humidity for up to 12 months.

2016
Disertaciones
1
  • ANNY GABRIELLE DA CRUZ CHAVES
  • DIAGNOSIS OF FIREWOOD LOGGING IN SUSTAINABLE FOREST MANAGEMENT PLANS IN THE CAATINGA OF THE RIO GRANDE DO NORTE STATE, BRAZIL

  • Líder : JULIANA LORENSI DO CANTO
  • MIEMBROS DE LA BANCA :
  • ALLYSON ROCHA ALVES
  • JULIANA LORENSI DO CANTO
  • TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL
  • Data: 12-dic-2016


  • Resumen Espectáculo
  • This study aimed to diagnose the firewood logging in 30 areas with Sustainable Forest Management Plan at the Caatinga vegetation in the Rio Grande do Norte State, Brazil. Data collection was based on interviews with the owners of the areas and survey application. About 63.3% of the areas under sustainable management were up to 750 hectares, with firewood productivity ranging between 83 and 263 stereos per hectare.  Most of them (70%) have more than three years of logging activity and the main logged product was firewood. The firewood cutting was outsourced in 83.3% of the areas and held by owners in the others. Great part of the owners (43.3%) had difficulties to hire skilled people for the cutting job, which was done with chainsaws in 66.7% of the areas and with ax and sickle in 13.3% of them. In 30% of the areas had illegal firewood logging before the Sustainable Forest Management Plan and in 63.3% of the areas the Legal Reserve of native vegetation was defined during the process of sustainable management legalization. It shows that the Sustainable Forest Management Plan can contribute for forest and environmental conservation. Sustainable forest management is economically interesting in the opinion of the 87.7% of the owners. Regarding to the main difficulties found, 80% of the owners mentioned the lack of inspection of the firewood logging that contributes to the illegal firewood commercialization. Besides, the delay in the process of sustainable management legalization by the government environmental agency is other difficulty found by the owners. The high percentage of satisfaction is due to the income generation. However, dissatisfaction is directly related to the difficulties encountered by the owners. Despite this, most of the owners (87.7%) intend to continue the sustainable forest management in theirs properties.

2
  • VALDECI FONTES DE SOUSA

  • FLORISTIC SURVEY AND ORNAMENTAL POTENTIAL OF RESTINGA PLANTS: IN SEARCH OF SUBSIDIES TO SUSTAINABLE LANDSCAPING

  • Líder : LEONARDO DE MELO VERSIEUX
  • MIEMBROS DE LA BANCA :
  • LEONARDO DE MELO VERSIEUX
  • ALICE DE MORAES CALVENTE
  • FERNANDA ANTUNES CARVALHO
  • GUSTAVO HEIDEN
  • LEANDRO DE OLIVEIRA FURTADO DE SOUSA
  • Data: 15-dic-2016


  • Resumen Espectáculo
  • The present dissertation includes the floristic survey of vascular plants in fragments of restinga of the Bonfim-Guarairas Environmental Protection Area, in the state of Rio Grande do Norte, Brazil, as well as the analysis and indication of native plants with ornamental potential and possibilities of its use in landscape projects. Initially, we present a general characterization of the Brazilian ‘restingas’, the objectives and justification of the dissertation, which is structured in chapters. The chapter I provides a floristic survey of vascular plants occurring in Bonfim-Guarairas Environmental Protection Area, based on field collections, herbarium and bibliography. The results of this chapter include the recognition of 169 species belonging to 128 genera and 58 families. The angiosperms were responsible for 166 species (98.2% of total), 125 genera (97.6%) and 55 families (94.8%) and three families (5.1%) were composed of monilophytes. Cyperaceae (11.8% of species), Poaceae (10.6%), Fabaceae (8.8%), Rubiaceae and Orchidaceae (4.7%) were the richest families in number of species. Also, the occurrence of the Orobanchaceae represented by Agalinis hispidula (Mart.) D'Arcy and Buchnera palustris (Aubl.) Spreng. is the first record for the family in the Rio Grande do Norte flora’s. A broad distribution pattern was confirmed for most species, which also occur in adjacent biogeographic provinces, reinforcing the mixed origin of restinga flora and we found a predominantly autochoric dispersion pattern, followed by zoocoric. In chapter 2 we discuss the ornamental potential of native plants, based on the analysis of their aesthetic characteristics. A list of plants with their scientific name is displayed, followed by family, habit, aesthetic characteristics, and possible use in landscaping. The results show a total of 25 species grouped in 22 genera and 16 families with ornamental potential. Convolvulaceae (3 spp.), Apocynaceae, Araceae, Cactaceae, Chrysobalanaceae and Rubiaceae (2 each) are highlighted for their aesthetic characteristics. Most of the species (17; 81%) are endemic to Brazil and two (Aspilia procumbens Baker and Melocactus violaceus Pffeif.) are endangered. In chapter 3 we present and discuss the ornamental potential of the genus Justicia (Acanthaceae) for the Paraíba flora. Dichotomous key for identification of species found in that state, in addition to a new occurrence, Justicia thunbergioides (Lindau) Leonard, followed by taxonomic commentaries, are also presented.

     

2015
Disertaciones
1
  • JULIANA APARECIDA SOUZA LEROY
  • Checklist das macrófitas aquáticas do RN com reforço amostral e florística do grupo na APA Bonfim-Guaraíra

  • Líder : LEONARDO DE MELO VERSIEUX
  • MIEMBROS DE LA BANCA :
  • ANDRE MEGALI AMADO
  • LEONARDO DE MELO VERSIEUX
  • LUIZ ANTONIO CESTARO
  • MARCCUS VINÍCIUS DA SILVA ALVES
  • PEDRO LAGE VIANA
  • Data: 11-dic-2015


  • Resumen Espectáculo
  • As macrófitas aquáticas são extremamente importantes para manter o equilíbrio ecológico dos ecossistemas aquáticos e por representarem parcela significativa da biodiversidade vegetal. O presente trabalho tem como objetivo o conhecimento da riqueza e distribuição desse grupo no estado do Rio Grande do Norte, onde pesquisas sobre plantas aquáticas são incipientes. O primeiro capítulo trata-se de um checklist das macrófitas aquáticas do Rio Grande do Norte. O estudo baseou-se no levantamento das plantas aquáticas dos herbários da UFRN e da UFERSA, em conjunto com a análise do material bibliográfico. As espécies foram classificadas de acordo com a localização, forma de vida, bacia hidrográfica, bioma, padrões de distribuição geográfica e a fonte de referência. A pesquisa listou um total de 58 famílias, 152 gêneros e 279 espécies. As famílias com maior número de espécies listadas foram Cyperaceae (29) e Poaceae (11). O Oeste Potiguar obteve o maior número de ocorrências e a forma de vida predominante foi a anfíbia. A bacia hidrográfica Apodi-Mossoró destaca-se com o maior número de coletas. Contrariando nossa hipótese original, de que a Mata Atlântica apresentaria maior riqueza, 55 % dos táxons estão na Caatinga. Apenas três espécies são endêmicas do Nordeste brasileiro: Sida galheirensis, Anamaria heterophylla e Paspalums cutatum. Os resultados comprovam que há deficiência em pesquisas em 5 bacias hidrográficas das 16 presentes no Estado e que pesquisas mais detalhadas são fundamentais para o conhecimento florístico das macrófitas aquáticas e a sua distribuição. O segundo capítulo trata-se de um levantamento florístico de macrófitas aquáticas na Área de Proteção Ambiental Bonfim-Guaraíra, localizada na região leste potiguar, que abriga remanescentes de Mata Atlântica. As coletas foram feitas em 14 lagoas e 4 rios da região, onde foi observada a sucessão florística das plantas aquáticas durante um ciclo hidrológico completo. A documentação resultou um total de 28 famílias, 40 gêneros e 64 espécies. As famílias com maiores números de espécies foram Cyperaceae (9 espécies) e Lentibulariaceae (8 espécies). As famílias com maior número de gêneros foi Cyperaceae (5 gêneros) e a Araceae (4 gêneros). O gênero Utricularia apresentou maior número de espécies. Das formas de vidas predominantes, 38% são emergentes e 22% anfíbias. A lagoa da Boa Cica apresentou maior riqueza de espécies entre as demais lagoas. Entre os rios, o rio da Ponte se destacou também pela maior riqueza. Das 64 espécies encontradas, 8 são novas ocorrências para o estado do Rio Grande do Norte e uma é uma nova ocorrência para o Nordeste do Brasil. Os resultados comprovam que a região estudada apresenta riqueza de plantas aquáticas, sugerindo maior ação de proteção e conservação dentro da APA.

2
  • LUCIANA GOMES PINHEIRO
  • Desenvolvimento de marcadores microssatélites e estrutura genética espacial da Copernicia prunifera (Mill) H. E. Moore (Arecaceae)

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • CRISTIANE GOUVEA FAJARDO
  • FABIO DE ALMEIDA VIEIRA
  • MURILO MALVEIRA BRANDÃO
  • Data: 14-dic-2015


  • Resumen Espectáculo
  • O estudo visou (1) desenvolver marcadores microssatélites (SSR) para Copernicia prunifera, e (2) caracterizar o padrão demográfico e a estrutura genética espacial (EGE) entre estágios de vida por meio de iniciadores ISSR. Foram desenvolvidos 17 pares de iniciadores SSR. A estrutura demográfica e EGE foram avaliadas em uma parcela com área de 0,55 ha em área natural, onde todos os indivíduos foram georreferenciados (n = 161). As análises moleculares dos SSR indicaram que todos os pares de iniciadores construídos, quando submetidos à PCR, amplificaram. Estes apresentaram tamanhos de pares de bases variando entre 113 e 250 bp. As análises demográficas mostraram padrão de distribuição espacial agregado nas primeiras classes de distância, aleatório entre 40 e 50 m e segregado em distâncias superiores. Dos 30 marcadores ISSR testados, oito foram selecionados gerando um total de 102 locos, sendo 100 polimórficos. Entre os três estágios, os jovens apresentaram maior índice de diversidade genética de Nei (He = 0,37), já o menor índice foi observado nos adultos reprodutivos (He = 0,34). Os resultados da AMOVA mostraram maior diferenciação genética dentro dos estágios de desenvolvimento (98,61%) do que entre os estágios (1,39%). A população total apresentou relação positiva e significativa de parentesco na primeira classe de distância (12,3 m). Os jovens apresentaram parentesco significativo até 10,5 m e negativa na quinta classe de distância (37,6 m). Os adultos não reprodutivos tiveram relação positiva de parentesco na primeira classe de distância (10,9 m) e distribuição aleatória dos genótipos nas demais classes. Os adultos reprodutivos apresentaram genótipos espacialmente aleatórios. Os valores para os testes de gargalo genético demonstraram que o número de locos com excesso de heterozigosidade observado foi maior que o esperado. Os resultados da EGE refletem a dispersão restrita da espécie e os testes de gargalo a redução de genótipos provocados pela antropização dos ambientes naturais de C. prunifera.

3
  • MARIANA DUARTE DA SILVA
  • Maturação de frutos e sementes de Acacia mangium Willd.: alterações físicas, fisiológicas e bioquímicas

  • Líder : MAURO VASCONCELOS PACHECO
  • MIEMBROS DE LA BANCA :
  • KATIANE DA ROSA GOMES DA SILVA
  • MARCIO DIAS PEREIRA
  • MAURO VASCONCELOS PACHECO
  • Data: 15-dic-2015


  • Resumen Espectáculo
  • O estudo do processo de maturação de frutos e sementes proporciona subsídios para o planejamento da colheita, evitando a deterioração a campo bem como melhorando a uniformidade do lote. Sendo assim, estudou-se as alterações físicas, fisiológicas e bioquímicas que ocorrem durante o processo de maturação fisiológica de frutos e sementes de Acacia mangium. Para isto, matrizes foram selecionadas e suas inflorescências marcadas, coletando-se seus frutos aos 30, 60, 90, 105, 120, 135 150, 165, 180 dias após a antese (DAA). As variáveis avaliadas foram: coloração, dimensão, teor de água e massa seca de frutos e sementes, germinação, IVG, primeira contagem e massa seca de plântulas; foram quantificados proteínas solúveis, aminoácidos livres totais, açúcares solúveis totais, açúcares não-redutores e amido.  O experimento foi conduzido em delineamento inteiramente casualizado. Para as variáveis coloração e dimensão foram utilizadas oito repetições. Para o teor de água, massa seca, germinação, IVG, primeira contagem e massa seca de plântulas foram utilizadas quatro repetições. E para as determinações bioquímicas foram utilizadas cinco repetições, e os dados foram submetidos às análises de regressão. Através da coloração de frutos e sementes A. mangium, ou das observações das suas dimensões, não foi possível identificar a maturidade fisiológica da espécie. Por outro lado, a massa seca de frutos e sementes foi maior aos 150 DAA, o acúmulo de reservas nutritivas e conteúdo de metabólitos exibiram maiores valores dos 105 aos 135 DAA, se mantendo estáveis a partir dos 150 DAA, período em que o teor de água caiu para 4,66%. No presente estudo foi possível identificar a maturidade fisiológica das sementes de Acacia mangium juntamente com o ponto de colheita, aos 150 DAA.

4
  • LUAN HENRIQUE BARBOSA DE ARAUJO
  • AVALIAÇÃO DA COMPACTAÇÃO DO SOLO NO CRESCIMENTO INICIAL DE ESPÉCIES FLORESTAIS DA CAATINGA

  • Líder : GUALTER GUENTHER COSTA DA SILVA
  • MIEMBROS DE LA BANCA :
  • ERMELINDA MARIA MOTA OLIVEIRA
  • GUALTER GUENTHER COSTA DA SILVA
  • NEYTON DE OLIVEIRA MIRANDA
  • Data: 15-dic-2015


  • Resumen Espectáculo
  • Apesar da importância do estudo sobre raízes, pouco se sabe sobre os efeitos negativos da compactação do solo no desenvolvimento espécies florestais da Caatinga. Nesse sentido, objetivou-se avaliar o crescimento inicial de Mimosa caesalpiniifolia, Tabebuia caraiba e Erythina velutina, em solo submetido a variados níveis de compactação. O experimento foi conduzido em casa de vegetação localizada na Unidade Acadêmica Especializada em Ciências Agrárias da UFRN. Pra realização do experimento, foi utilizado Latossolo Amarelo de textura franco-arenosa, proveniente da área de experimentação florestal da Escola Agrícola de Jundiaí (EAJ) do município de Macaíba-RN, em unidade experimental composta por três anéis de PVC sobrepostos, de 10 cm de diâmetro e 25 cm de altura, sendo o anel central o que sofreu a compactação. O delineamento experimental utilizado foi o de blocos casualizados, com seis repetições, sendo testados quatro níveis de compactação do solo (1,35; 1,45; 1,60 e 1,80 kg.dm-³), avaliando-se as seguintes variáveis: diâmetro, altura, número de folhas, massa seca da parte aérea e do sistema radicular em cada camada dos vasos. No geral, as espécies M. caesalpiniifolia, T. caraiba e E. velutina tiveram o crescimento inicial favorecido pelo tratamento composto por solo não compactado. As espécies M. caesalpiniifolia e T. caraiba se mostraram relativamente resistente a compactação do solo, não sofrendo nenhuma redução significativa no crescimento radicular a densidade igual ou inferiores a 1,60 kg.dm-³, enquanto, E. velutina se mostrou susceptível aos efeitos da compactação do solo, apresentando alterações significativas no crescimento radicular sob densidades de solo igual ou superiores a 1,45 kg.dm-³. O aumento da compactação do solo provocou o impedimento da expansão da raiz pivotante no interior das unidades experimentais, promovendo o acúmulo de raízes nas camadas superiores do solo para as espécies estudadas. O impedimento físico em subsuperfície alterou o crescimento aéreo inicial das espécies M. caesalpiniifolia e E. velutina, porém não influenciou o crescimento aéreo das mudas de T. caraiba aos níveis de compactação testados.

5
  • DJAILSON SILVA DA COSTA JÚNIOR
  • Qualidade de briquetes produzidos a partir de resíduos de bambu e serragem de madeira

  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • ANGÉLICA DE CÁSSIA OLIVEIRA CARNEIRO
  • ELISABETH DE OLIVEIRA
  • LEANDRO CALEGARI
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • Data: 16-dic-2015


  • Resumen Espectáculo
  • O presente trabalho teve por objetivo avaliar briquetes produzidos com resíduos de bambu e serragem. Foram produzidos em briquetadeira da marca Lippel ®, com pressão de compactação 150 Bar, 5’ de prensagem. Utilizou-se temperaturas de 120; 130 e 140 ºC, e composições de relações percentuais de bambu e serragem: (100/0); (75/25); (50/50); (25/75) e (0/100). Foram avaliadas as propriedades físicas e mecânicas, química imediata e poder calorífico superior. Os briquetes produzidos com as maiores porcentagens de bambu apresentaram valores de propriedades físicas mais elevadas, maior resistência à compressão, além de teores de materiais voláteis e poder calorifico mais elevados.

6
  • ALENCAR GARLET
  • O manejo florestal comunitário da Caatinga em projetos de assentamentos rurais na Paraíba.

  • Líder : PAULO ROGERIO SOARES DE OLIVEIRA
  • MIEMBROS DE LA BANCA :
  • JOSE AUGUSTO DA SILVA SANTANA
  • LUCIO VALERIO COUTINHO DE ARAUJO
  • PAULO ROGERIO SOARES DE OLIVEIRA
  • Data: 17-dic-2015


  • Resumen Espectáculo
  • O trabalho teve por objetivo avaliar os resultados do manejo florestal comunitário da Caatinga. Por meio da aplicação de questionários semiestruturados foram entrevistados 51 agricultores, em 05 projetos de assentamentos, no estado da Paraíba. Os resultados indicam que há carência de atividades produtivas nos assentamentos, e que os agricultores dependem de recursos de programas sociais, aposentadorias e do trabalho fora do assentamento para comporem a renda familiar. A agricultura ocupa entre 5,4 e 7,8% da área dos assentamentos, e a pecuária extensiva com bovinos, ovinos e caprinos usa mais de 90% da área total, havendo acesso dos rebanhos nas áreas manejadas, Reserva Legal e APP. O manejo demonstrou ser uma atividade geradora de trabalho e renda para os assentados. Os valores recebidos pelas famílias, em 2014, variaram de R$ 400,00 a 12.150,00. As principais dificuldades enfrentadas foram a falta de compradores e o baixo preço da lenha, resultantes do alto nível de informalidade existente entre os consumidores. Os resultados indicam que ampliação da fiscalização ambiental e a redução da burocracia podem estimular a prática do manejo florestal comunitário.

7
  • MARIA LUIZA DE SOUZA MEDEIROS
  • TESTES PARA A AVALIAÇÃO DA QUALIDADE FISIOLÓGICA DE SEMENTES DE Moringa oleifera Lam.

  • Líder : MARCIO DIAS PEREIRA
  • MIEMBROS DE LA BANCA :
  • MARCIO DIAS PEREIRA
  • CASSIA REGINA DE ALMEIDA MORAES
  • ANDRESSA VASCONCELOS FLORES
  • Data: 17-dic-2015


  • Resumen Espectáculo
  • A avaliação do vigor de sementes é um fator importante para a detecção de lotes de sementes de alta qualidade, de modo que o desenvolvimento de procedimentos para avaliar o potencial fisiológico tem sido importante ferramenta dentro de programas de controle de qualidade de sementes. Nesse sentido, este trabalho teve como objetivo adequar as metodologias dos testes de envelhecimento acelerado, condutividade elétrica e lixiviação de potássio para a avaliação do vigor de sementes de Moringa oleifera LAM.. Para tanto, quatro lotes de sementes foram submetidos aos testes de germinação, emergência de plântula, índice de velocidade de emergência, primeira contagem de emergência, comprimento e massa seca de plântulas e teste frio, para a sua caracterização fisiológica, além dos testes de envelhecimento acelerado, condutividade elétrica e lixiviação de potássio. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições de 50 sementes, e as médias comparadas pelo teste de Tukey a 5% de probabilidade, sendo realizada a análise de regressão polinomial no teste de condutividade elétrica. Para o teste de envelhecimento acelerado, foram estudados os períodos de envelhecimento de 12, 24 e 72 horas, a 40, 42 e 45 ºC. Para o teste de condutividade elétrica, utilizou-se a temperatura de 25 °C por períodos de 4, 8, 12, 16 e 24 horas de imersão, em 75 e 125 mL de água destilada, utilizando-se 25 e 50 sementes e, para o teste de lixiviação de potássio, utilizou-se amostras de 25 e 50 sementes, colocadas em copos plásticos contendo 70 e 100 mL de água destilada à 25 °C por períodos de 1, 2, 3, 4, 5 e 6 horas. A partir dos resultados obtidos, pode-se inferir que as metodologias que melhor se ajustaram para o teste de envelhecimento acelerado em sementes de moringa foram a temperatura de 40 ºC por 12 e 72 horas, 42 ºC a 72 horas e 45 ºC a 24 horas. Para o teste de condutividade elétrica em sementes de moringa, a combinação de 50 sementes em 75 mL de água destilada por período de embebição de 4 horas e, 50 sementes em 125 ml por 4 horas foram eficiente para a diferenciação dos lotes de sementes de moringa quanto ao vigor e, para o teste de lixiviação de potássio em sementes de moringa, a combinação de 50 sementes /100 mL de água destilada permitiu a separação dos lotes em quatro níveis de vigor, a partir de 2 horas de imersão, mostrando-se promissor na avaliação da qualidade de sementes de moringa.

8
  • EDUARDO DE ALMEIDA LOPES
  • ASPECTOS OPERACIONAIS E CUSTOS DE DOIS SISTEMAS DE EXPLORAÇÃO DE LENHA NA CAATINGA


  • Líder : JULIANA LORENSI DO CANTO
  • MIEMBROS DE LA BANCA :
  • JOSE AUGUSTO DA SILVA SANTANA
  • JULIANA LORENSI DO CANTO
  • LUCIO VALERIO COUTINHO DE ARAUJO
  • Data: 17-dic-2015


  • Resumen Espectáculo
  • O manejo florestal sustentável na Caatinga é de grande importância, sobretudo para atender à principal demanda de produtos florestais na região Nordeste, a lenha e o carvão vegetal. Apesar disso, há poucos estudos para subsidiar o planejamento e o dimensionamento técnico e econômico das atividades de exploração sustentável de lenha na Caatinga. Neste contexto, este trabalho objetiva analisar dois sistemas de exploração de lenha, um manual e outro semimecanizado, em Planos de Manejo Florestal Sustentável (PMFS) no estado do Rio Grande do Norte. O sistema manual, com corte realizado com machado e foice, apresentou jornada total média de trabalho de 10,17 horas, com eficiência operacional de 60,5% e produtividade média de 4,8 estéreos de lenha por homem por dia. O custo deste sistema foi de R$ 11,17 por estéreo de lenha. O sistema semimecanizado, com corte realizado com motosserra, apresentou jornada total média de trabalho de 7,22 horas, com eficiência operacional de 67,2% e produtividade média de 6,4 estéreos de lenha por homem por dia. O custo deste sistema foi de R$ 14,44 por estéreo de lenha.

9
  • MARAÍSA COSTA FERREIRA
  • ANÁLISE DE PROPRIEDADES DA MADEIRA DE Eucalyptus urograndis PARA FINS ENERGÉTICOS IMPLANTADOS NO MUNICÍPIO DE MACAÍBA-RN

  • Líder : ROSIMEIRE CAVALCANTE DOS SANTOS
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • ANGÉLICA DE CÁSSIA OLIVEIRA CARNEIRO
  • RENATO VINÍCIUS OLIVEIRA CASTRO
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • Data: 18-dic-2015


  • Resumen Espectáculo
  • Dentro do contexto da necessidade por biomassa lenhosa para fins energéticos, avaliações na qualidade da madeira fornecem informações importantes do potencial combustível dessa matéria-prima, além de possibilitar a escolha do material genético adequado para ser implantado visando elevada produção e eficiência na conversão energética. No Estado do Rio Grande do Norte (RN) esse insumo é utilizado  como fonte principal de energia em atividades nos setores industrial, comercial e residencial. Assim, visando colaborar com informações importantes sobre a qualidade da madeira para energia, o estudo objetivou caracterizar a madeira de híbridos de Eucalyptus urophylla S.T. Blake x Eucalyptus grandis (Hill) Maiden implantados para fins energéticos na área de experimentação florestal da Unidade Acadêmica Especializada em Ciências Agrárias (UAECIA), Macaíba-RN. As análises ocorreram no Laboratório de Painéis e Energia da Madeira (LAPEM) da Universidade Federal de Viçosa (UFV), onde foram realizadas as seguintes avaliações na madeira de três materiais genéticos (GG100; AEC0144 e AEC0224): determinação da densidade básica, poder calorífico superior, análise química e posteriormente cálculos para a estimativa da produção de massa e energia do plantio. Os dados obtidos foram submetidos à análise de variância, sendo as médias comparadas pelo teste de Tukey a 5% de probabilidade. Os valores para os parâmetros tecnológicos da madeira dos clones avaliados estão dentro da faixa encontrada por diferentes autores para madeira de eucalipto em idades próximas às do estudo. O efeito da idade mostrou-se discreto para a maioria dos parâmetros avaliados. A quantidade de energia por m³ seguiu a mesma tendência disposta pela densidade básica da madeira. Com base na literatura,  as madeiras dos clones apresentaram valores adequados em suas características químicas e térmicas para fins energéticos, com destaque para o clone GG100. 



10
  • TALITA GEOVANNA FERNANDES ROCHA
  • Qualidade fisiológica de sementes e plântulas de Moringa oleifera  Lam.  por meio da técnica de análise de imagens.

  • Líder : MARCIO DIAS PEREIRA
  • MIEMBROS DE LA BANCA :
  • MARCIO DIAS PEREIRA
  • CASSIA REGINA DE ALMEIDA MORAES
  • ANDRESSA VASCONCELOS FLORES
  • Data: 18-dic-2015


  • Resumen Espectáculo
  • Nos últimos anos os estudos dirigidos para a avaliação da morfologia interna de sementes têm sido apoiados em técnicas de análise de imagens. Dentre os métodos utilizados para esta finalidade, destacam-se os testes de raios X, que propicia rápida e eficiente avaliação das partes constituintes da semente da maioria das espécies, e a análise computadorizada de plântulas, que se destaca por incluir a minimização do erro humano, aumentando a confiabilidade dos dados para fins de comparação, além do arquivamento das imagens para análise posterior. Neste sentido, os objetivos desta pesquisa foram: a) avaliar a morfologia interna de sementes Moringa oleifera Lam. pelo teste de raios X e verificar a sua relação com a germinação; b) verificar a potencialidade de utilização do software “Sistema de Análise de Plântulas” (SAP), desenvolvido especialmente para a espécie moringa, para detectar diferenças de vigor entre os lotes de sementes, em comparação com as informações fornecidas pelo teste tradicionalmente utilizados para esta espécie. Foram utilizados quatro lotes de sementes de moringa coletadas manualmente em diferentes localidades, tanto para avaliação da morfologia interna pelo teste de raios X quanto para a análise de imagens de plântulas. A morfologia interna das sementes foi observada empregando o teste de raios X com intensidade 39 kV por 0,06 segundos, utilizando 200 sementes por lote. As etapas das análises das imagens radiografadas foram realizadas através do software ImageJ, no qual foram determinados os valores de área da cavidade embrionária do interior da semente, perímetro, largura e altura. A esfericidade ou fator de forma da semente foi calculado separadamente. Em seguida, as sementes foram classificadas de acordo com a morfologia interna visualizada nas imagens radiográficas, sendo estabelecidas quatro categorias: embrião bem formado, embrião com manchas, embrião com danos mecânicos e sementes sem o embrião. Após a análise de imagens, realizou-se o teste de germinação. Para a determinação do vigor das sementes por meio do SAP, as plântulas foram avaliadas aos seis e oito dias após a semeadura do teste de germinação, sendo obtidos dados referentes ao índice de uniformidade de desenvolvimento, crescimento, vigor e comprimento de plântulas. O delineamento experimental foi inteiramente casualisado com quatro repetições. Conclui-se que a utilização do teste de raios X em sementes de moringa é promissora na detecção da qualidade das sementes dos diferentes lotes, auxiliando na separação de sementes vazias e com anormalidades embrionárias, inviabilizando seu uso de imediato ou para armazenamento; o SAP é uma alternativa viável para avaliação do vigor de sementes de moringa, pois permitiu separar os lotes em níveis de vigor de forma similar às avaliações rotineiramente utilizadas para essa finalidade.

11
  • JUCIER MAGSON DE SOUZA E SILVA
  • Produção e Distribuição de Biomassa em Clones de Eucalyptus urophylla x Eucalyptus grandis no Município de Macaíba – RN

  • Líder : GUALTER GUENTHER COSTA DA SILVA
  • MIEMBROS DE LA BANCA :
  • GUALTER GUENTHER COSTA DA SILVA
  • PAULO ROGERIO SOARES DE OLIVEIRA
  • RENATO VINÍCIUS OLIVEIRA CASTRO
  • Data: 18-dic-2015


  • Resumen Espectáculo
  • A produção de biomassa é uma das variáveis mais importantes em um povoamento florestal e sua distribuição relativa nos diferentes componentes da árvore (lenho, galhos, folhas, casca e raízes) representa uma das principais características a ser considerada na escolha de uma espécie, visando-se obter uma maior produtividade. A partição da biomassa em espécies florestais é bastante variável, podendo ser influenciada tanto por vários fatores ambientais quanto por fatores inerentes à própria espécie, sendo necessário a realização de estudos individualizados para cada material genético e condição edafoclimáticas. O objetivo deste trabalho foi determinar a produção de biomassa da parte aérea em três clones de Eucalyptus Urograndis (AEC0422, AEC0144, GG100), e sua distribuição relativa entre os componentes da árvore aos 12, 24, 36 e 48 meses de idade. O trabalho foi realizado na área de experimentação florestal do campus Macaíba/UFRN, localizado na Escola Agrícola de Jundiaí. Para quantificação da biomassa utilizou-se o método destrutivo, abatendo-se quatro árvores, com DAP médio, para cada clone e idade considerada. A produção e a partição da biomassa foram diferenciadas entre os clones avaliados. Para a produção total de biomassa os valores encontrados variaram entre 3,33 Mg.ha-1 aos doze meses e 75,35 Mg.ha-1 aos 48 meses de idade, a partir dos 24 meses todos os clones apresentaram maior acúmulo de biomassa em seus fustes (madeira + casca), sendo o componente madeira aquele que apresentou maior representatividade. A produção e a partição da biomassa foram dependentes do material genético, da idade e do componente avaliado.

2014
Disertaciones
1
  • ANE CRISTINE FORTES DA SILVA
  • PRODUÇÃO, ACÚMULO E DECOMPOSIÇÃO DA SERRAPILHEIRA E REPARTIÇÃO DA PRECIPITAÇÃO PLUVIOMÉTRICA POR ESPÉCIES DA CAATINGA EM VÁRZEA, PARAÍBA

  • Líder : JOSE AUGUSTO DA SILVA SANTANA
  • MIEMBROS DE LA BANCA :
  • JACOB SILVA SOUTO
  • JOSE AUGUSTO DA SILVA SANTANA
  • JULIANA LORENSI DO CANTO
  • Data: 17-mar-2014


  • Resumen Espectáculo
  • Objetivou-se estimar a produção, acúmulo e decomposição da serrapilheira em diferentes ambientes sucessionais e avaliar a repartição da água da chuva por espécies da caatinga. Foram realizadas coletas mensais durante 23 meses em quatro áreas: degradada, estágio sucessional primário, secundário e tardio. A deposição da serrapilheira foi quantificada através de 72 coletores de 1,0 m x 1,0 m, com fundo da tela de náilon, instalados nas áreas de estudo, com exceção da área degradada. A serrapilheira depositada foi fracionada em folhas, galhos, estruturas reprodutivas e miscelânea, secas em estufa e pesadas. Para avaliar a serrapilheira acumulada, utilizou-se moldura metálica com dimensões de 0,5 m x 0,5 m, lançada aleatoriamente na área de estudo. Para avaliação da decomposição, 40g serrapilheira foram colocadas em sacolas de náilon (litterbags) malha 1,0 mm², dimensões 20,0 cm x 20,0 cm, sendo distribuídas na superfície do solo e retiradas mensalmente, limpas, secas e pesadas. Para a avaliação da contribuição das espécies da Caatinga na repartição da precipitação pluvial, utilizou-se interceptômetros instalados 1,0 m acima da superfície do solo, distribuídos sob a copa dos indivíduos das espécies Croton blanchetianus (marmeleiro), Mimosa tenuiflora (jurema preta), Cnidosculus quercifolius (favela), Aspidosperma pyrifolium (pereiro) e Poincianella pyramidalis (catingueira), nas quais foi avaliado a precipitação total, precipitação interna e o escoamento pelo tronco. As deposições totais no período experimental foram 2.631,26, 3.144,89 e 4.542,30 kg ha-1, nos estágios sucessionais primário, secundário e tardio, respectivamente. Os coeficientes de decomposição (K) da serrapilheira acumulada foram 0,719, 0,848 e 1,170, respectivamente. A deposição da serrapilheira apresenta características sazonais independente do estágio sucessional da vegetação. A maior contribuição no material depositado corresponde à fração folhas em todos os estágios sucessionais avaliados. O escoamento pelo tronco é maior nas espécies com caule liso e sem bifurcações.

2
  • MIRELLA CARVALHO SOUZA AVELINO
  • TESTES BIOQUÍMICOS PARA AVALIAÇÃO DO VIGOR EM SEMENTES DE Mimosa caesalpiniaefolia Benth.

  • Líder : MAURO VASCONCELOS PACHECO
  • MIEMBROS DE LA BANCA :
  • CLARISSA SANTOS DA SILVA
  • MARCIO DIAS PEREIRA
  • MAURO VASCONCELOS PACHECO
  • Data: 21-mar-2014


  • Resumen Espectáculo
  • Mimosa caesalpiniaefolia Benth. é uma espécie florestal pertencente à família Mimosaceae, recomendada para recomposição de áreas degradadas e largamente utilizada para produção de mourões, estacas, lenhas e carvão. A avaliação do vigor por meio de testes bioquímicos tem sido importante ferramenta dentro de programas de controle de qualidade de sementes, sendo os testes de condutividade elétrica e lixiviação de potássio os mais eficientes na verificação do potencial fisiológico. Ambos os testes baseiam-se na integridade das membranas celulares, nos quais as sementes menos vigorosas apresentam menor velocidade de reestabelecimento da integridade das mesmas durante a embebição e, em consequência, liberam maiores quantidades de solutos para o meio exterior. O trabalho foi dividido em duas etapas, sendo a primeira a adequação da metodologia do teste de condutividade elétrica e a segunda a eficiência entre os testes de condutividade elétrica e lixiviação de potássio na avaliação de vigor dos diferentes lotes de Mimosa caesalpiniaefolia. Para o teste de adequação da condutividade elétrica foi utilizado diferentes combinações de temperaturas, 25 e 30 ºC, de número de sementes, 25 e 50, de períodos de embebição, 4, 8, 12, 16 e 24 horas, e de volumes de água deionizada, 50 e 75 mL. A melhor combinação obtida no primeiro experimento foi utilizada na segunda etapa a fim de comparar a eficiência dos testes na classificação dos lotes em diferentes níveis de vigor. Os dados foram submetidos à análise de variância, as médias comparadas entre si pelo teste de Tukey a 5% de probabilidade, e quando necessário foi realizada análise de regressão polinomial. No segundo ensaio o teste de condutividade elétrica realizado no período de oito horas se mostrou mais eficiente na separação de diferentes níveis de vigor dos lotes analisados quando comparado ao teste de lixiviação de potássio.

3
  • RODRIGO FERREIRA DE SOUSA
  • USO SUSTENTÁVEL DA Copernicia prunifera (Miller) H. E Moore NO SEMIÁRIDO POTIGUAR: VALORIZAÇÃO DE SABERES E CONSERVAÇÃO DOS RECURSOS GENÉTICOS

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • ANDERSON MARCOS DE SOUSA
  • CRISTIANE GOUVEA FAJARDO
  • FABIO DE ALMEIDA VIEIRA
  • MALCON DO PRADO COSTA
  • Data: 28-mar-2014


  • Resumen Espectáculo
  • Copernicia prunifera (Arecaceae), popularmente conhecida como carnaúba, é nativa da região nordeste do Brasil, com ocorrência ao longo das margens de rios e áreas alagadiças. Por ser versátil em relação às formas de usos, essa palmeira ficou conhecida como “árvore da vida”, sendo o pó cerífero o principal produto extraído da C. prunifera. Este estudo teve como objetivos investigar aspectos etnoecológicos e etnobotânicos da C. prunifera em uma comunidade extrativista, selecionar primers ISSR (Inter Simple Sequence Repeat) para estudos de genética de populações, e estudar a diversidade e a estrutura genética temporal em microescala espacial de uma população natural no Estado do Rio Grande do Norte, Brasil. Foram entrevistados 11 moradores considerados informantes-chaves na região de Ipanguaçu/RN, onde a maioria (73%) relatou a ocorrência de um morfotipo diferente de carnaúba, conhecida como “carnaúba branca”. Grande parte dos informantes (82%) afirmou que a espécie possui dispersão quiropterocórica. Na etnobotânica, o pó cerífero foi citado por todos como o produto mais importante extraído da C. prunifera e a folha a parte mais usada (45%), seguida dos frutos (29%), caule e raiz (ambas com 13%). Na seleção de primers ISSR, dos 17 que foram testados, 12 amplificaram o DNA e, destes, sete foram selecionados para caracterizar a estrutura genética de uma população remanescente (n = 37). O primer que obteve a maior porcentagem de locos polimórficos (LP%) foi UBC 841 (16,36%), já o primer que teve a menor LP% foi UBC 827 (8,18%). No estudo de diversidade e estrutura genética temporal em microescala espacial de uma população natural (n = 101) foram utilizados sete iniciadores ISSR que permitiram a visualização de 93 locos, com 100% de polimorfismo. Os regenerantes foram os que mais se destacaram em relação à diversidade genética (He = 0,411 e Ho = 0,599), seguido pelos jovens (He = 0,394 e Ho = 0,579) e adultos (He = 0,267 e Ho = 0,427). A AMOVA mostrou que a maior variação genética ocorre dentro dos estágios de vida (93,42%) quando comparado entre eles (6,58%). O dendograma (UPGMA), com base na identidade genética de Nei mostrou maior semelhança genotípica entre os jovens e regenerantes (0,979). No teste de hipótese para o gargalo genético (bottleneck) foi observado elevado número de locos com excesso de heterozigosidade para os dois modelos utilizados (IAM = 92 e SMM = 91), indicando redução do tamanho efetivo populacional. Todos os estágios de desenvolvimento apresentaram estruturação genética espacial (EGE), com valores de coancestrias positivos e significativos, sendo os valores de Sp de 0,04 para os regenerantes, 0,93 para os jovens, 0,15 para os adultos e 0,53 para a população geral. Essa EGE ocorre, provavelmente, devido à dispersão restrita de sementes. Os resultados desta pesquisa irão contribuir para difundir os conhecimentos etnobotânicos, etnoecológicos e genéticos da carnaúba, subsidiando estratégias de manejo e conservação das populações naturais da espécie.

4
  • SEBASTIAO GILTON DANTAS
  • Crescimento inicial e morfologia foliar em plantas de Enterolobium contortisiliquum (Vell.) Morong. e Erythrina velutina Mart. Ex Benth., sob estresse hídrico. 

  • Líder : SIDNEY CARLOS PRAXEDES
  • MIEMBROS DE LA BANCA :
  • JOSE AUGUSTO DA SILVA SANTANA
  • LEONAM GOMES COUTINHO
  • SIDNEY CARLOS PRAXEDES
  • Data: 28-mar-2014


  • Resumen Espectáculo
  • A Caatinga é o tipo vegetacional predominante no semiárido do Brasil, onde muitos habitantes dependem do extrativismo para sobrevivência: alimentação humana e animal, medicina popular, produção madeireira, etc. É o ecossistema seco com maior densidade populacional no mundo. Os estádios iniciais de desenvolvimento são os mais críticos durante o ciclo de vida de um vegetal, sendo primordiais para seu estabelecimento em ambientes sujeitos a estresse hídrico. Informações, sobre adaptações do crescimento das espécies, correlacionadas com estudos de sua distribuição Caatinga, serão importantes do ponto de vista ecológico e econômico, pois podem fornecer subsídios para o desenvolvimento de técnicas de cultivo, para programas de exploração sustentável e de recuperação de áreas degradadas. Este trabalho teve por objetivo estudar o crescimento inicial e a morfologia foliar em plantas de Enterolobium contortisiliquum (Vell.) Morong. (tamboril) e Erythrina velutina Mart. ex Benth (mulungu), espécies de ocorrência na Caatinga, sob estresse hídrico. Após a semeadura e emergência, as plântulas foram submetidas a três regimes hídricos: 450 (controle), 225 (estresse moderado) e 112,5 (estresse severo) mm de lâmina de água por 40 dias. A semeadura ocorreu em sacos de 5 kg e após o estabelecimento das plântulas, foi realizado desbaste deixando uma plântula por saco. No início as regas ocorreram diariamente com água destilada, passando a serem em dias alternados após o desbaste. Vinte e quarenta dias após o desbaste foram realizadas coletas de plântulas para serem feitas análises de crescimento e partição de biomassa. Quando comparadas ao grupo controle, os tratamentos com estresse hídrico apresentaram redução no crescimento da parte aérea, maior raiz, número de folhas e folíolos, fitomassa seca total e área foliar em ambas as espécies, sendo que em geral, este efeito foi mais marcante para a E. velutina. Quanto à partição de biomassa, ocorreram poucas alterações ao longo do experimento. As alterações morfológicas nas folhas em função do estresse não foram significativas, porém houve uma tendência, em ambas as espécies, de produção de folhas que facilitam a perca de calor para o meio. Não foi possível se estabelecer uma relação positiva entre inibição do crescimento e distribuição das espécies, visto que E. velutina é espécie de ocorrência mais comum na Caatinga. Desta forma, outros aspectos devem ser levados em consideração ao se estudar a adaptação das espécies a ambientes secos.

5
  • ADNA LAÍS DE OLIVEIRA LEOCÁDIO FURTADO
  • MOBILIZAÇÃO DE RESERVAS E PARTIÇÃO DE METABÓLITOS DURANTE A GERMINAÇÃO DA SEMENTE E O ESTABELECIMENTO DA PLÂNTULA EM MORINGA

  • Líder : EDUARDO LUIZ VOIGT
  • MIEMBROS DE LA BANCA :
  • EDUARDO LUIZ VOIGT
  • MAURO VASCONCELOS PACHECO
  • SERGIO LUIZ FERREIRA DA SILVA
  • Data: 31-mar-2014


  • Resumen Espectáculo
  • A germinação da semente e o estabelecimento da plântula são processos críticos para o cultivo comercial. Assim, este trabalho tem como objetivo caracterizar a mobilização das reservas e a partição dos produtos durante estes processos em moringa, uma espécie promissora para a produção de biodiesel no Nordeste. Para tanto, as sementes foram germinadas em sistema de rolo sob condições controladas (80 µmol/m2/s, fotoperíodo de 12h e 27±2 °C) e as plântulas foram transferidas para água destilada em vasos plásticos de 1 L de capacidade e mantidas em condições de casa de vegetação por mais 10 dias. As coletas foram realizadas aos 0, 4, 8, 10, 12, 14 e 20 dias após a embebição (DAE), dividindo as plântulas em cotilédones, parte aérea e sistema radicular. Foram determinados os conteúdos de massa seca (MS), lipídeos neutros (LN), proteínas solúveis (PS), amido, açúcares solúveis totais (AST), açúcares não redutores (ANR) e aminoácidos livres totais (AALT) e as atividades de isocitrato liase (ICL), proteases ácidas e amilases. A partição dos produtos, em termos de MS, ocorreu de forma diferencial, resultando em baixa razão parte aérea/sistema radicular, indicativa de um possível mecanismo de resistência ao déficit hídrico. A mobilização das PS foi iniciada na germinação, enquanto que a mobilização dos LN e do amido foi desencadeada no estabelecimento da plântula, embora todas as reservas tenham sido exauridas até o 20° DAE, culminando com a expansão das primeiras folhas. No sistema radicular, houve acumulação de AST, ANR e AALT do 12° ao 16° DAE e consumo destes metabólitos até o 20° DAE, enquanto que na parte aérea, ocorreu diminuição de AST e AALT em paralelo com o aumento de ANR do 12° ao 20° DAE. As atividades de ICL, proteases ácidas e amilases ocorreram de forma coordenada com a mobilização de LN, PS e amido, respectivamente. Estes padrões de mobilização das reservas e partição dos metabólitos em moringa se mostraram distintos daqueles verificados para outras espécies arbóreas estudadas. É possível que estes padrões estejam relacionados com estratégias metabólicas utilizadas por esta espécie para alcançar sucesso durante o estabelecimento da plântula.

6
  • AUREA DE PAULA MEDEIROS E SILVA
  • ESTUDO DO PERFIL TÉRMICO DE FORNOS DO TIPO“CAIPIRA” UTILIZADOS PELO SETOR DE CERÂMICA VERMELHA EM PARELHAS NA REGIÃO DO SERIDÓ-RN

  • Líder : ROSIMEIRE CAVALCANTE DOS SANTOS
  • MIEMBROS DE LA BANCA :
  • ROSIMEIRE CAVALCANTE DOS SANTOS
  • ALEXANDRE SANTOS PIMENTA
  • CARLOS ALBERTO PASKOCIMAS
  • RENATO VINÍCIUS OLIVEIRA CASTRO
  • Data: 31-mar-2014


  • Resumen Espectáculo
  • O presente trabalho teve como objetivo caracterizar o perfil térmico de fornos tipo

    “caipira” utilizados pelo setor de cerâmica vermelha em Parelhas, na região do

    Seridó/RN, visando propor intervenções estruturais que possam colaborar para

    aumentar a produtividade e qualidade dos produtos, otimizar o consumo de

    madeira e mitigar as perdas existentes durante o processo de queima. O trabalho foi

    desenvolvido na Cerâmica Esperança na cidade de Parelhas-RN, Brasil, no período

    compreendido entre agosto de 2012 a setembro de 2013. Foram realizados 4

    tratamentos, com três repetições, ou seja, com um delineamento experimental 4×3,

    totalizando 12 unidades experimentais (queimas). A argila foi o parâmetro

    utilizado como referência para distinguir os tratamentos. Foram monitorados: a

    quantidade de lenha utilizada em cada queima, as telhas enfornadas antes, e após a

    queima, para determinação da qualidade e do tempo de queima durante todo o

    processo. Para caracterização do perfil térmico do forno foram aferidas

    temperaturas em 15 pontos marcados na superfície da carga enfornada. As

    aferições foram realizadas em intervalos de 30 minutos, a partir do pré-

    aquecimento, até ao final da queima, utilizando um pirômetro de mira laser.

    Posteriormente houve a tabulação dos dados e a confecção das curvas de

    temperatura em função da distância entre o fio de arame e os produtos cerâmicos.

    As matérias-primas foram caracterizadas e analisadas, utilizando-se as técnicas de

    fluorescência por raios X (FRX), difração por raios X (DRX), análise

    granulométrica (AG), e análise de umidade e de densidade na madeira. A madeira

    apresentou densidade com valores sem diferença significativa entre si, umidade

    dentro dos padrões permitidos e o consumo heterogêneo. A argila apresentou

    pouca retração linear quando submetida ao fogo, e o forno do tipo “caipira”

    apresentou perfil térmico muito heterogêneo, e quando a temperatura aumenta

    verificou-se que houve um aumento do tempo de queima em todos os tratamentos.

    O parâmetro do fio foi significativo para todos os tratamentos, mas com oscilações

    diferenciadas, significando que o fio não deve ser o modo de forma genérico e

    exclusivo, utilizado como critério para finalização do processo de queimas. A

    qualidade das telhas esteve atrelada, principalmente, as temperaturas alcançadas

    com seu aumento gradativo, sendo essas temperaturas influenciadas pela umidade,

    densidade da madeira, pelo tempo de queima e as condições atmosféricas. A parte

    central do forno foi a área que atingiu maior temperatura, e de maneira mais

    homogênea, com maior concentração de produtos de primeira qualidade. A curva

    de temperatura ideal, que proporcionou a melhor qualidade dos produtos cerâmicos

    foi a do tratamento 1 que obteve uma média de 18,66% de produto de primeira

    qualidade por repetição atingindo temperatura mínima de 100° C, e máxima de

    400°C na superfície do forno.

7
  • BRUNO RAFAEL MORAIS DE MACEDO
  • ESPÉCIES ARBÓREAS NATIVAS ORNAMENTAIS DO RIO GRANDE DO NORTE 


  • Líder : ALICE DE MORAES CALVENTE
  • MIEMBROS DE LA BANCA :
  • ALICE DE MORAES CALVENTE
  • LEONARDO DE MELO VERSIEUX
  • MARCELO FREIRE MORO
  • Data: 15-dic-2014


  • Resumen Espectáculo
  • A Caatinga e a Floresta Atlântica apresentam ampla riqueza de espécies, as quais podem atender às exigências para diversos usos. Considerando o atual nível de degradação da vegetação do Rio Grande do Norte, e o crescente uso de espécies exóticas, torna-se urgente a execução de ações que visem a conservação da biodiversidade desses biomas. Nessa perspectiva, utilizar espécies vegetais autóctones na arborização das cidades acaba por se caracterizar em um instrumento de conservação e de valorização da biodiversidade local. Diante desse contexto, o objetivo geral do presente trabalho é reunir e fornecer informações acerca das espécies arbóreas nativas ornamentais no estado com o intuito de fomentar e difundir o seu uso na arborização urbana. Como objetivos específicos o trabalho possui: (1) avaliar e verificar a demanda e os custos de manutenção da arborização urbana nativa e exótica, comparativamente, com base em dados obtidos no estado (Cap. 1); (2) Fornecer uma listagem de espécies arbóreas nativas ornamentais do estado, incluindo espécies com uso já difundido e sugerindo novos elementos com potencial ornamental (Cap. 2); e (3) produzir um guia de espécies arbóreas da flora nativa como um meio de divulgação dos resultados obtidos com conteúdo acessível à sociedade. A análise da manutenção da arborização urbana foi realizada no Campus Central da UFRN, para o levantamento das espécies nativas arbóreas ornamentais foram realizadas expedições a fragmentos vegetais no estado, além de levantamento da literatura especializada. Como resultado, verificou-se evidentes menores custos e menor demanda de serviços para manutenção da vegetação nativa, evidenciando a visível vantagem no uso de uma arborização de composição florística regionalizada. O levantamento das espécies nativas arbóreas ornamentais levou à seleção de 95 espécies distribuídas em 30 famílias, sendo 17 espécies (17,35%) ocorrendo exclusivamente na Caatinga, 27 espécies (25,55%) na Mata Atlântica e mais da metade da riqueza considerada (55,10%) ocorrendo em ambos os biomas, o que proporciona uma diversidade disponível para a composição da arborização urbana, tanto para cidades situadas no domínio da Mata Atlântica (81 spp.) como da Caatinga (71 spp.). A partir desses resultados, elaborou-se uma proposta de manual de reconhecimento e cultivo de árvores nativas, consistindo na etapa inicial no processo de valorização do potencial florístico existente com o intuito de auxiliar o desenvolvimento de uma perspectiva ambiental regionalizada da gestão urbana no estado. 

8
  • Daniel Ferreira da Costa
  • DIVERSIDADE GENÉTICA EM POPULAÇÕES NATURAIS DE Hancornia speciosa Gomes NO ESTADO DO RIO GRANDE DO NORTE: IMPLICAÇÕES PARA CONSERVAÇÃO

  • Líder : FABIO DE ALMEIDA VIEIRA
  • MIEMBROS DE LA BANCA :
  • CRISTIANE GOUVEA FAJARDO
  • FABIO DE ALMEIDA VIEIRA
  • MURILO MALVEIRA BRANDÃO
  • Data: 15-dic-2014


  • Resumen Espectáculo
  • A Hancornia speciosa Gomes é uma espécie nativa do Brasil com ampla distribuição no território nacional. Seu fruto é bastante apreciado pelas populações locais, sendo utilizado para fabricação de doces, sorvetes e polpas. O crescimento urbano e a expansão agrícola têm fragmentado as áreas florestais onde a espécie ocorre, com a consequente redução do tamanho populacional, podendo ocasionar sérias implicações para a manutenção da espécie a longo prazo. O objetivo deste estudo foi avaliar a diversidade genética remanescente em sete populações de H. speciosa do estado do Rio Grande do Norte, após selecionar marcadores de DNA entre repetições de sequências simples do genoma (ISSR). Na avaliação da qualidade do DNA, o material genético obtido a partir do caule apresentou pureza semelhante ao extraído da folha, obtendo valores para a razão entre as absorvâncias (A260/A280) de 1,46 para o caule e de 1,42 para a folha, ficando, ambos, um pouco abaixo do valor considerado ótimo que é entre 1,5 e 2,5. O tecido caulinar apresentou DNA de qualidade, sendo útil para análises moleculares da espécie. Para a seleção de iniciadores da replicação, 19 primers ISSR foram testados, onde seis foram eficientes, apresentando locos nítidos e em maior número (UBC 808, UBC 810, UBC 826, UBC 827, UBC 841, UBC 842), totalizando 63 locos, sendo que apenas 30 (47,62%) apresentaram polimorfismo. O valor de PIC (conteúdo de informações polimórficas) para os primers selecionados atingiu a média de 0,37, variando de 0,26 a 0,44, indicando que são úteis para avaliar a diversidade genética da espécie. Para o total das populações, o número de locos polimórficos foi de 57 (81,43%), com o número total de alelos efetivos (Ne) 1,487. A diversidade genética de Nei (He) obteve o valor de 0,283 e o índice de Shannon (I) 0,424. Entre as populações, o número de locos polimórficos foi considerado baixo, variando entre 29 (41,43%) na população Cotovelo e 33 (47,14%) em Macaíba. Os índices de diversidade He e I nas populações variaram respectivamente de 0,161 e 0,237 na população Parque das Dunas a 0,206 e 0,294 na população Macaíba. Os padrões observados para diversidade alélica indicam a ocorrência de gargalo genético em todas as populações, de acordo com o modelo de passos de mutação. O modelo de alelos infinitos revelou desequilíbrio entre mutação e deriva genética apenas na população Parque das Dunas. Os resultados obtidos sugerem que a diversidade genética está distribuída em diversas populações, sendo essencial a conservação das áreas de sua ocorrência para a manutenção da diversidade genética da espécie.

9
  • FERNANDO DOS SANTOS ARAÚJO
  • SELEÇÃO DE ÁRVORES MATRIZES DE Mimosa Caesalpiniaefolia BENTH. PARA PRODUÇÃO DE SEMENTES

  • Líder : MAURO VASCONCELOS PACHECO
  • MIEMBROS DE LA BANCA :
  • FABIO DE ALMEIDA VIEIRA
  • MARCIO DIAS PEREIRA
  • CRISTIANE GOUVEA FAJARDO
  • CLARISSA SANTOS DA SILVA
  • Data: 16-dic-2014


  • Resumen Espectáculo
  • Plantios florestais com espécies nativas podem ser realizados com o intuito de reverter o quadro de escassez de produtos florestais e mitigar a degradação ambiental no bioma Caatinga. Nestes casos, as sementes florestais de boa qualidade constituem-se em insumos importantes para a formação desses plantios. Assim, este trabalho teve como objetivo selecionar árvores matrizes de Mimosa caesalpiniaefolia em uma floresta plantada no Estado do Rio Grande do Norte com vistas a fornecer sementes para recomposição florestal na região semiárida do Nordeste do Brasil. Dessa área foram amostradas nove árvores matrizes, das quais se coletaram amostras de material foliar para estimar a sua diversidade genética e também sementes para avaliação da qualidade fisiológica e estimar a diversidade genética de progênies. Testes de germinação e vigor foram utilizados para avaliar a qualidade das sementes e, para estimar a diversidade genética, foram selecionados marcadores moleculares ISSR (Inter-simple sequence repeat) capazes de detectar polimorfismo genético entre os indivíduos da espécie. Todas as matrizes produziram sementes com elevada taxa de germinação e emergência, porém foram constatadas diferenças sutis de vigor quando avaliadas pelos testes de condutividade elétrica e lixiviação de potássio, os quais são considerados testes promissores para estimar o desempenho das sementes em campo. Os marcadores ISSR selecionados para a espécie revelou que as matrizes apresentam diversidade genética moderada e produzem progênies com diversidade também moderada. Assim, conclui-se que as nove matrizes amostradas produzem sementes com qualidade fisiológica e diversidade genética satisfatória para recomposição florestal.

10
  • RAFAELA MARIA RIBEIRO BEZERRA
  •  

    Predição da composição química do carvão vegetal por espectrometria no infravermelho médio com reflectância total atenuada de transformada de Fourier (ATR-FITR)


  • Líder : ALEXANDRE SANTOS PIMENTA
  • MIEMBROS DE LA BANCA :
  • ALEXANDRE SANTOS PIMENTA
  • JULIANA LORENSI DO CANTO
  • ELISABETH DE OLIVEIRA
  • LEANDRO CALEGARI
  • Data: 16-dic-2014


  • Resumen Espectáculo
  •  

    O objetivo do presente trabalho foi estimar os teores de carbono fixo,  matérias voláteis e cinzas no carvão vegetal usando a reflectância total atenuada com transformar de Fourier no infravermelho (FTIR-ATR), juntamente com os métodos de calibração multivariada. Várias técnicas de calibração multivariada, incluindo mínimos quadrados parciais (PLS), intervalo de mínimos quadrados parciais (IPLS), algoritmo genético (GA), foram comparados e validados através do estabelecimento de teste de significância (teste t e teste de Shapiro-Wilk). Amostras de carvão (n = 72) foram divididos em calibração (n = 52) e conjuntos de validação (n = 20), aplicando o algoritmo de seleção clássico Kennard-Stone (KS) para os espectros ATR-FTIR. Para teor de carbono fixo, o resultado obtido utilizando PLS-GA para o erro quadrático médio de validação cruzada (RMSECV) e previsão (RMSEP) foram 3,77% e 4,29%, respectivamente. Para a matéria volátil, RMSECV e RMSEP de 4,36% e 4,65% foi alcançada pelo modelo PLS utilizando sete variáveis latentes (LV). Finalmente, para cinzas, RMSECV e RMSEP de 0,58% e 0,38%, foi alcançado pelo modelo PLS utilizando oito variáveis latentes (LV). Foram realizados teste t e Quantil-quantil (Q-Q) plot para comparar os resultados dos modelos de uns com os outros e com um método de referência. Estes resultados sugerem que a espectroscopia FTIR-ATR e calibração multivariada pode ser efetivamente usado para determinar os teores de carbono fixo, matéria volátil e cinzas em carvão vegetal brasileiro.


11
  • BRUNO GOMES DE NORONHA
  • QUALIDADE FISIOLOGICA DE SEMENTES DE Moringa oleífera Lam. POR MEIO DA ANÁLISE DE IMAGENS

  • Líder : MARCIO DIAS PEREIRA
  • MIEMBROS DE LA BANCA :
  • CASSIA REGINA DE ALMEIDA MORAES
  • CIBELE DOS SANTOS FERRARI
  • AMILTON GURGEL GUERRA
  • MARCIO DIAS PEREIRA
  • Data: 16-dic-2014


  • Resumen Espectáculo
  • Os principais testes que avaliam a qualidade de sementes são destrutivos e exigem tempo, o  que é considerado longo e caro na cadeia que envolve a produção e comercialização das sementes. Deste modo, técnicas que viabilizem a redução do tempo que se gasta para se avaliar a qualidade de lotes de sementes é muito favorável, do ponto de vista técnico, econômico e científico. A análise de imagens de sementes tanto por meio de raio-X como por imagens digitais representam alternativas para estes setores, além de serem reproduzíveis e rápidos, dando maior agilidade e autonomia às atividades dos sistemas de produção. O objetivo do trabalho foi analisar a morfologia interna de sementes desta espécie por meio de imagens radiografadas e a eficiência da determinação do incremento de área de sementes durante a embebição, por meio da análise de imagens e compará-los com os resultados dos testes de germinação e vigor na avaliação da qualidade fisiológica das sementes. Para os testes de raio-X, as sementes foram expostas por 0,14 segundos à radiação de 40kV e 2,0 mAs. As imagens obtidas foram analisadas utilizando o programa ImageJ e postas a germinar posteriormente em câmara do tipo BOD à 27ºC, no qual realizou-se a comparação dos resultados obtidos nos testes de germinação. Para a determinação do teste de incremento de área (I.A%), foram utilizadas sementes com e sem tegumento, mantidas em câmara do tipo BOD a 15° e 20°C, as sementes foram fotografadas antes e após o período de embebição, os resultados foram comparados com os testes de germinação e vigor. Para o teste de raio-X, observou-se que sementes com área vazia superior a 20%, apresentaram maior percentual de plântulas anormais. E a análise de incremento de área, evidenciou que é possível ranquear os lotes de sementes após 8 horas de embebição a 15°C de acordo com os testes de germinação e vigor.

12
  • MARY ANNE BARBOSA DE CARVALHO
  • Aplicação de carvão vegetal e nitrogênio influenciando propriedades físicas e químicas do solo e massa seca de arroz

  • Líder : GUALTER GUENTHER COSTA DA SILVA
  • MIEMBROS DE LA BANCA :
  • GUALTER GUENTHER COSTA DA SILVA
  • ALEXANDRE SANTOS PIMENTA
  • ERMELINDA MARIA MOTA OLIVEIRA
  • NEYTON DE OLIVEIRA MIRANDA
  • Data: 17-dic-2014


  • Resumen Espectáculo
  • A degradação dos solos agrícolas causa problemas produtivos e ambientais, com consequências econômicas e sociais para as populações. Além das perdas de solo e de sua fertilidade poderem inviabilizar a atividade produtiva, existe grande preocupação com a emissão para a atmosfera de gases que contribuem para o aquecimento do planeta. Assim sendo, o objetivo do trabalho é avaliar a aplicação de biocarvão nas propriedades físicas e químicas do solo e na massa seca do arroz. O experimento foi desenvolvido em casa de vegetação na Unidade Acadêmica Especializada em Ciências Agrárias da Universidade Federal do Rio Grande do Norte-UFRN, em Macaíba-RN. O delineamento estatístico foi o inteiramente casualizado, em esquema fatorial 4x4, contando de doses de biocarvão(0, 3500, 7000 e 10500 kg ha-1) e doses de nitrogênio (0, 30, 60 e 90 kg ha-1) correspondendo a 16 tratamentos. O solo foi misturado com as respectivas doses, em seguida colocado em vasos de 10 L, utilizando como planta indicadora o arroz de terras altas. As variáveis analisadas foram à retenção de água, a densidade do solo, a massa seca da parte aérea do arroz e as propriedades químicas. A retenção de água no solo apresentou efeito linear positivo das doses de biocarvão; A densidade do solo foi influenciada pela interação entre doses de biocarvão e de nitrogênio, cujo desdobramento revelou efeito quadrático da dose de biocarvão sobre a densidade do solo apenas na dose zero de nitrogênio; Para massa seca do arroz houve interação de doses de nitrogênio dentro de doses de biocarvão observando-se na dose zero de biocarvão o efeito quadrático apenas do nitrogênio; As propriedades químicas foram significativos os efeitos da dose de biocarvão para pH e CaMg (p<0,05) e para K (p<0,01). Não houve efeito significativo das doses de nitrogênio (30 e 60 kg ha-1) nem da interação entre doses de biocarvão e de nitrogênio. Conclui-se ser necessária a condução do experimento e o acompanhamento de resultados na mesma área em longo prazo. Assim, a evolução nas características químicas e físicas do solo pode ser avaliada, gerando informações consistentes sobre o potencial do biocarvão como condicionador de solo e fertilizante.

13
  • CAMILA COSTA DA NÓBREGA
  • Crescimento, produção de biomassa e desrama artificial de espécies florestais em resposta ao método de cultivo em Macaíba, RN

  • Líder : GUALTER GUENTHER COSTA DA SILVA
  • MIEMBROS DE LA BANCA :
  • GUALTER GUENTHER COSTA DA SILVA
  • JULIANA LORENSI DO CANTO
  • MALCON DO PRADO COSTA
  • JACOB SILVA SOUTO
  • Data: 17-dic-2014


  • Resumen Espectáculo
  • Objetivou-se avaliar a produção, crescimento, distribuição de biomassa e desrama artificial de três espécies florestais Sabiá (Mimosa caesalpiniaefolia), Acácia (Acacia mangium) e Nim (Azadirachta indica), aos 12 e 24 meses de idade, em resposta ao método de cultivo do solo. O delineamento experimental foi fatorial (2x3), correspondente a seis tratamentos distribuídos em parcelas subdivididas em faixas com quatro blocos, sendo o fator principal dois métodos de cultivo (intensivo - 1 e mínimo - 0) e o fator secundário as espécies florestais (Sabiá - S, Acácia - A e Nim - N), com quatro repetições, perfazendo 24 parcelas. O plantio foi realizado no espaçamento 3x3 m, tendo 64 plantas/parcela. Nos tratamentos com cultivo intensivo utilizou-se esterco bovino (4,0 t/ha), superfosfato triplo – P2O5 (146,0 kg/ha) distribuídos em sulcos e calcário (2,0 t/ha). Em todos os tratamentos aplicou-se NPK (6-30-6: 100 g/planta), em covetas laterais. O crescimento de cada árvore foi obtido com a medição da altura e do diâmetro. Para a quantificação da biomassa desramada selecionou-se uma árvore da bordadura de cada parcela com altura e diâmetro médios. Realizou-se a desrama até a altura equivalente a 1/3 da altura da copa da árvore.  Para o Sabiá, por ser uma espécie que apresenta maior número de fustes foram deixados três fustes mais vigorosos; enquanto, as espécies Acácia e Nim, apenas um fuste.  Para a obtenção da biomassa da parte aérea a árvore média foi abatida, e seus componentes (folhas, galhos, casca e lenho) separados, pesados e secos, obtendo-se biomassa fresca e seca. Não houve diferença significativa entre os tratamentos aos 12 meses para as variáveis: altura, galho, casca e lenho. Aos 24 meses as variáveis galho e casca não apresentaram diferença significativa. As variáveis altura, DAP e lenho aos 24 meses apresentaram diferenças estatísticas superiores no cultivo intensivo para as três espécies. As variáveis biomassa seca total e folhas apresentaram diferenças entre os métodos de cultivo apenas para a espécie Nim. Para desrama artificial de folhas e total houve interação entre os fatores, em que a espécie e o tipo de cultivo influenciaram na quantidade desramada, havendo diferença significativa também entre as espécies e entre os tipos de cultivo, apenas o Sabiá não apresentou diferença entre os métodos de cultivo. Já para galhos, houve diferença significativa entre as espécies e entre os tipos de cultivo, porém não houve interação entre os fatores. Concluiu-se que o método de cultivo do solo influencia na produção, crescimento, distribuição de biomassa e quantidade de biomassa desramada artificialmente das espécies sabiá, acácia e nim de forma diferente. O método de cultivo intensivo do solo influenciou positivamente a produção, crescimento e quantidade de biomassa desramada artificialmente das três espécies.

14
  • VRGINIA CLAUDIA DE LIMA MENEZES
  • CRESCIMENTO INICIAL E MORFOLOGIA FOLIAR EM PLANTAS DE Mimosa Caesalpiniaefolia Benth. EM FUNÇÃO DO MANEJO MICROBIANO, SOB ESTRESSE SALINO

  • Líder : SIDNEY CARLOS PRAXEDES
  • MIEMBROS DE LA BANCA :
  • SIDNEY CARLOS PRAXEDES
  • FABIO DE ALMEIDA VIEIRA
  • ANTONIO EVAMI CAVALCANTE SOUSA
  • Data: 19-dic-2014


  • Resumen Espectáculo
  •  

    O sabiá (Mimosa caesalpiniaefolia Benth.) é uma espécie endêmica do bioma Caatinga, sendo considerada tolerante aos estresses salino e hídrico. O processo de salinização dos solos e das águas subterrâneas e superficiais é um dos mais importantes problemas de degradação ambiental, com seus efeitos prejudiciais sendo mais pronunciados nas áreas de regiões áridas e semiáridas, e que vem crescendo rapidamente em diversas partes do globo, causando problemas de grandes proporções na produtividade das culturas agrícolas. Condicionadores orgânicos como esterco de curral e casca de arroz podem contribuir para redução da PST, possivelmente em virtude da liberação de CO2 e produção de ácidos orgânicos, durante a decomposição da matéria orgânica, além de atuarem como fontes de cálcio e magnésio e inibirem a disponibilidade do sódio. A associação íntima e benéfica das micorrizas com as plantas resulta no aumento da absorção de água e nutrientes pelos vegetais, principalmente o fósforo, devido sua baixa mobilidade no solo. O objetivo deste trabalho foi a avaliação do crescimento inicial de mudas de sabiá sob inoculação com fungos micorrízicos arbusculares, adubadas com esterco de curral e irrigadas com água de diferentes níveis de salinidade. O experimento foi instalado em condições de casa de vegetação nas dependências da Escola Agrícola de Jundiaí - UFRN, Campus Macaíba. O delineamento estatístico adotado foi o inteiramente casualizado composto de doze tratamentos – três substratos (solo estéril, esterco e FMA), quatro níveis de salinidade (0,2; 1,5; 3,0 e 4,5 dSm-1) e cinco repetições, totalizando sessenta unidades experimentais. Os resultados indicam que a inoculação de fungos micorrízicos possui contribuições para o crescimento das plantas, sobretudo em raízes e parte aérea, o que sugere que sua aplicação seja  benéfica no estabelecimento de plantas de sabiá em condições naturais, com solo pobre em P. Os níveis de salinidade não causaram efeitos com relevância estatística no desenvolvimento das plantas, indicando a resistência do Sabiá à mesma.


15
  • JOSÉ DENILSON DE PAULA ARAÚJO
  • EFEITO DOS ESTRESSES HÍDRICO E TÉRMICO SOBRE PLÂNTULAS DE PINHÃO-MANSO (Jatropha curcas L.)

  • Líder : CRISTIANE ELIZABETH COSTA DE MACEDO
  • MIEMBROS DE LA BANCA :
  • CRISTIANE ELIZABETH COSTA DE MACEDO
  • SIDNEY CARLOS PRAXEDES
  • JOSEMIR MOURA MAIA
  • Data: 19-dic-2014


  • Resumen Espectáculo
  • Biocombustíveis são um foco de discussão, ao que se trata de energias renováveis. Quanto a esse ponto, atualmente discutisse a utilização de zonas áridas para produção de biocombustíveis derivados de espécies oleaginosas resistentes às condições de aridez. A Jatropha curcas L. tem sido indicada como uma espécie potencial para esse tipo de utilização, apontada pela literatura como resistente em condições desfavoráveis: seca e salinidade. Todavia, pouco é descrito sobre sua resistência a altas temperaturas e secas severas, principalmente sobre a sinergia de estresses combinados, cenário típico de regiões semiáridas. Este trabalho visa portanto avaliar os efeitos da temperatura sobre a J. curcas em condições de seca. O estresse hídrico foi aplicado utilizando duas concentrações de PEG6000 diluídas em solução hidropônica, induzindo potencial hídrico de -0,3 e -0,7 MPa. Já o estresse térmico foi conduzido em B.O.D. à 40ºC. Após aplicação dos estresses, o material vegetal foi coletado para avaliação dos indicadores de estresse como conteúdo relativo de água (CRA) e dano de membrana (DM), além das determinações bioquímicas de proteínas, aminoácidos totais (AALT), prolina (PRO) e glicina betaína (GB), açúcares solúveis totais (AST) e amido. Os resultados mostraram que o CRA pouco se altera, em condições de estresse e DM foi menor sob estresse térmico. Os solutos AALT, PRO e amido tiveram concentrações mais significativas em folhas, enquanto que proteínas, GB e AST foram mais significativas nas raízes. Quanto à observação dos efeitos provocados pelo estresse hídrico, este trabalho fez comparações a resultados semelhantes obtidos em outros estudos, reforçando afirmações sobre a eficiência das respostas da J. curcas em condições de seca. Todavia as plantas se mostraram mais susceptíveis ao estresse térmico, embora, quando em estresses combinados as respostas tenderam ao aumento em comparação ao estresse térmico isolado. No geral, estes resultados abrem espaço para que novos estudos sejam realizados a fim de testar os efeitos dos estresses combinados sobre a J. curcas e quais respostas a planta pode apresentara sob estas condições.

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