Taxonomic revision and phylogeny of Bignonia L. (Bignonieae, Bignoniaceae)

Author(s)

Alexandre Rizzo Zuntini

• Document type: Doctoral Thesis
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB)
• Defense date: 2015-01-09

Examining board members

Lucia Garcez Lohmann; João Semir; André Olmos Simões; Vinicius Castro Souza

• Advisor: Lucia Garcez Lohmann

Abstract

Bignonia, the fifth largest genus in the tribe Bignonieae (Bignoniaceae), is characterized by stems with phloem wedges in multiple of four, leaves 2-foliolated, tendrils usually simple, flowers with dorso-ventrally flattened corolla and absent nectariferous disk, and seed with opaque wings. The current circumscription is based on a recent phylogenetic study that congregated 28 species previously placed in eight different genera. This unification made Bignonia a complex group, with a wide morphological range, which created a big taxonomic challenge. In this manner, the objectives were to review the taxonomy of the genus and to reconstruct its phylogeny using molecular characters, including high throughput sequencing, to better understand this group. With the taxonomic treatment presented here, 30 species are recognized, two of these described as new, one reestablished and another synonymized. Ten clades were obtained, all supported by morphological characters, are the base for the subgeneric classification proposed. The results presented here will provide the base for future evolutionary and biogeographic study (AU)

• FAPESP's process: 11/09160-5 - Taxonomic revision, phylogeny and biogeography of Bignonia L. (Bignonieae, Bignoniaceae)
• Grantee: Alexandre Rizzo Zuntini
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)