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Doctoral Thesis
DOI
10.11606/T.41.2015.tde-18052015-103416
Document
Author
Full name
Alexandre Rizzo Zuntini
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2014
Supervisor
Committee
Lohmann, Lucia Garcez (President)
Freitas, Loreta Brandão de
Semir, João
Simões, André Olmos
Souza, Vinicius Castro
Title in Portuguese
Revisão e filogenia de Bignonia L. (Bignonieae, Bignoniaceae)
Keywords in Portuguese
Bignoniaceae
Filogenia
Neotrópico
Revisão taxonômica
Abstract in Portuguese
Bignonia, o quinto maior gênero da tribo Bignonieae (Bignoniaceae), é caracterizado por apresentar ramos com cunhas de floema em múltiplo de quatro, folhas 2-folioladas, gavinhas geralmente simples, flores com corola achatada e sem disco nectarífero, e sementes com alas opacas. A atual circunscrição é baseada num recente estudo filogenético que congregou 28 espécies anteriormente posicionadas em oito diferentes gêneros. Esta união tornou Bignonia um grupo complexo, com ampla variação morfológica, criando um grande desafio taxonômico. Assim, os objetivos foram revisar a taxonomia do gênero e reconstruir sua filogenia baseada em caracteres moleculares, incluindo sequenciamento em larga escala, para melhor compreender o grupo. Com o tratamento taxonômico apresentado aqui, são reconhecidas 30 espécies, duas das quais descritas como novas, uma reestabelecida e outra sinonimizada. Foram encontrados dez clados, todos suportados por sinapomorfias morfológicas, que são a base da classificação subgenérica proposta. Os resultados gerados aqui fornecerão subsídios para um futuro estudo evolutivo e biogeográfico
Title in English
Taxonomic revision and phylogeny of Bignonia L. (Bignonieae, Bignoniaceae)
Keywords in English
Bignoniaceae
Neotropics
Phylogeny
Taxonomic revision
Abstract in English
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
 
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Release Date
2017-05-17
Publishing Date
2015-05-28
 
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