Banca de QUALIFICAÇÃO: JACIARA CERQUEIRA DA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JACIARA CERQUEIRA DA SILVA
DATE: 28/06/2024
TIME: 09:00
LOCAL: On-line
TITLE:

SEEDLING MORPHOLOGY OF THE TRIBES EXOSTYLEAE AND LEPTOLOBIEAE (LEGUMINOSAE, PAPILIONOIDEAE) IN A TAXONOMIC AND PHYLOGENETIC CONTEXT

KEY WORDS:

Systematic; Phylogeny; Leptolobieae; Exostyleae; Post-seminal development

PAGES: 63
BIG AREA: Ciências Biológicas
AREA: Botânica
SUMMARY:

The morphology of Leguminosae seedlings has great systematic potential, including providing support for resolving phylogenetic relationships in certain clades using combined data, as well as assistance in taxon systematics. The objective of the project is to evaluate the relevance of using morphological characters of seedlings from two tribes of Papilionoideae (Leptolobieae and Exostyleae) in a phylogenetic and taxonomic context, seeking to contribute to the understanding of the evolutionary relationship between the terminals of the tribes. Searches were carried out in herbaria and virtual platforms to map the matrices and obtain information on the fruiting period and collection viability. At least one species from each genus of the tribes was collected and germinated. A seedling was considered when the eophyll(s) were fully formed and then illustrated. An identification key will be created for the seedlings of the tribes' genera. Morphological data from Leptolobieae seedlings confirmed six seedling characters that approximate Staminodianthus racemosus D.B.O.S. Cardoso, H.C. Lima & L.P. Queiroz of the Diplotropis - Guianodendron – Staminodianthus clade, a result already confirmed in the phylogenetic analysis between the terminals. As a result, seedling morphology in Exostyleae adds relevant characters to the tribe's systematics, also contributing to inferring degrees of kinship. The morphological type of the seedling distinguished Uribea tamarindoides from other taxa, as it presents the PEF type and opposite phyllotaxis in the first node. This species also presented exclusive and shared data, and is more related to Holocalyx balansae, sharing characters such as asymmetrical base, vein main eccentric and filiform stipules. Zollernia and Lecointea share relevant characters such as simple eophylls, absence of canaliculated rachis, linear stipules, entire stipule margin, absence of stipels. Harleyodendron unifoliolatum is distinguished by presenting unifoliolate eophylls, campdodromous venation and triangular stipule. Exostyles species can be identified by the number of cataphylls, shape of the limb and apex. The expected results involving the addition of new characters of seedling morphology and phylogenetic analysis of genera of the Exostyleae tribe presuppose the determination of more consistent sub clades and their degrees of relatedness.

COMMITTEE MEMBERS:
Presidente - ***.687.258-** - ANDRÉ OLMOS SIMÕES - UNICAMP
Interna - ***.214.747-** - ANA CRISTINA ANDRADE DE AGUIAR DIAS - UFPA
Externa à Instituição - FERNANDA ILKIU BORGES DE SOUZA - EMBRAPA
Externo à Instituição - RODRIGO SCHÜTZ RODRIGUES - UFRGS