Banca de DEFESA: ALEXANDRE GONÇALVES DOS SANTOS E SILVA FILHO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ALEXANDRE GONÇALVES DOS SANTOS E SILVA FILHO
DATE: 24/09/2021
TIME: 14:00
LOCAL: Via videoconferência: Google Meet
TITLE:

Phylogenetic systematics of Lactifluus (Russulales) with emphasis on species from the north and northeast of Brazil


KEY WORDS:

Agaricomycetes, filogeny, Neotropical fungi, Russulaceae, taxonomy


PAGES: 204
BIG AREA: Ciências Biológicas
AREA: Botânica
SUBÁREA: Taxonomia Vegetal
SPECIALTY: Taxonomia de Criptógamos
SUMMARY:

Lactifluus (Rusulaceae, Rusulales) groups fungi that produce in their reproductive form agaricoid, pleurotoid and gasteroid basidiomata, mainly characterized by latex exudation. Lactifluus has approximately 210 species distributed mostly in the tropics, where they frequently form ectomycorrhizal association with a wide variety of plants. The diversity of the genus has been better investigated in Africa and Asia, while remains underexplored in Neotropical region. In Brazil, only nine Lactifluus species were described or reported from Amazon, Atlantic Forest and Caatinga, and another ten species still treated as Lactarius needed to be revised and confirmed. Thus, the proposed project aimed to systematize and interpret the genus Lactifluus from morphological and molecular analysis, with the increase of new collections and review of collection of Herbaria from different biomes in the North and Northeast regions of Brazil. The analyzes were based on morphological and molecular data from ten specimens deposited in the PACA, INPA, JPB UFRN-Fungos and URM Herbaria; and also of 31 specimens collected in different ecosystems of Amazonia, Caatinga and Atlantic Forest. The morphological review of herborized collections resulted in recombination of Lactifluus amazonensis, Lactifluus brasiliensis, Lactifluus braunii, Lactifluus mamorensis, Lactifluus russula and Lactifluus rupestris; and in the designation of one lectotype for Lactifluus annulifer, Lf. braunii and Lf. russula. New sample resulted in the identification and sequencing of Lf. amazonensis, Lf. annulifer, Lactfluus dunensis, Lactifluus lepus, Lactifluus neotropicus and Lactifluus mamorensis. Another 11 species were proposed as new to science: Lactifluus aurantioceraceus nom. prov., Lactifluus brunneoruber nom. prov., Lactifluus candidus nom. prov., Lactifluus flavuscaespitosus nom. prov., Lactifluus guttulatus sp. nov., Lactifluus perforatus nom. prov., Lactifluus piperogalactus sp. nov., Lactifluus reniformis nom. prov., Lactifluus restingae nom. prov., Lactifluus sphatuliformis sp. nov. and Lactifluus umbilicatus sp. nov. Molecular analysis of the ITS, LSU and RPB2 DNA regions of the collected specimens confirm the distinct lineages of the cited species in Lactifluus, in which are distributed in five different clades in the subgenera Gymnocarpi, Lactariopsis and Pseudogymnocarpi. Furthermore, the phylogenetic analyses of the collected specimens provided support for delimitation of two sections: Lactifluus section Piperogalacti sec. nov. and Lactifluus section multicepis nom prov.; and emend of Lactifluus sect. Panuoidei.


BANKING MEMBERS:
Externa à Instituição - DIRCE LEIMI KOMURA - INPA
Presidente - 942.983.190-91 - FELIPE WARTCHOW - UFPB
Externo à Instituição - MARCELO ALOISIO SULZBACHER - UFSM
Externa à Instituição - MARIANA CAVALCANTE E ALMEIDA SÁ - UNIPÊ
Externo à Instituição - VAGNER GULARTE CORTEZ - UFPR
Notícia cadastrada em: 24/08/2021 10:28
SIGAA | Superintendência de Tecnologia da Informação - (84) 3342 2210 | Copyright © 2006-2024 - UFRN - sigaa11-producao.info.ufrn.br.sigaa11-producao