Banca de DEFESA: JOSENILDA APRIGIO DANTAS DE MEDEIROS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JOSENILDA APRIGIO DANTAS DE MEDEIROS
DATA : 18/12/2018
HORA: 08:30
LOCAL: Auditório do ETec
TÍTULO:

MORFOLOGY OF SEEDS OF Amburana cearensis (ALLEMÃO) A. C. SMITH APPLIED TO THE ANALYSIS OF SEED VIGOR

PALAVRAS-CHAVES:

Fabaceae, seed quality, forest seed, vigor classification of seedlings.

PÁGINAS: 55
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Silvicultura
ESPECIALIDADE: Sementes Florestais
RESUMO:

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.

MEMBROS DA BANCA:
Presidente - 270.392.004-06 - SALVADOR BARROS TORRES - UFC
Interno - 1880265 - MARCIO DIAS PEREIRA
Externo à Instituição - MARCOS VINICIUS MEIADO - UFS