Phylogeny, ontogeny and floral evolution in Malmeeae (Annonaceae) and Trimezieae (...
Diversification of Adesmia DC. and the role of the Andes in shaping morphology and...
Palinotaxonomy of Iridaceae JUSS. from Goiás and Tocantins States, Brasil
Grant number: | 14/00803-9 |
Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |
Start date until: | August 01, 2014 |
End date until: | July 31, 2015 |
Field of knowledge: | Biological Sciences - Botany - Plant Taxonomy |
Principal Investigator: | Renato de Mello-Silva |
Grantee: | Juliana Lovo |
Supervisor: | Paula J. Rudall |
Host Institution: | Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil |
Institution abroad: | Royal Botanic Gardens, Kew, England |
Associated to the scholarship: | 12/18396-5 - Patterns of floral evolution in Trimezieae (Iridaceae), BP.PD |
Abstract Iridaceae are a morphologically distinctive yet highly diverse family of monocotyledons. In particular, the flowers vary greatly in size, shape, and ornamentation. Floral diversity has traditionally been an important source of taxonomic characters. Within the tribe Trimezieae style and stigma morphology is especially diverse. These structures have therefore been used, usually in association with characters such as tepal shape and ornamentation, as taxonomic markers. However, the homology of the various character states has never been investigated and recent molecular phylogenetic analyses have shown that these characters display high levels of homoplasy. Detailed studies aimed at understanding evolutionary patterns and the value of these characters for systematic studies are needed. The main goals of this study are to determine the character states that support key clades within the tribe and to better understand patterns of floral evolution in Trimezieae. This will be achieved by examining ontogeny of floral structures and associating characters to the phylogenetic history of the group. Additional taxa and molecular characters will be added to an existing phylogeny for Trimezieae in order to provide the framework for these studies. The diversity and relatively restricted distribution of Trimezieae, a Neotropical group whose distribution is centred on Brazil, makes it particularly suited to this kind of approach. (AU) | |
News published in Agência FAPESP Newsletter about the scholarship: | |
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