Full text
| |
| Author(s): |
Carla Poleselli Bruniera
Total Authors: 1
|
| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) |
| Defense date: | 2015-04-17 |
| Examining board members: |
Milton Groppo Junior;
Maria Fernanda Aguiar Calió;
Jose Rubens Pirani;
Jefferson Prado;
André Olmos Simões
|
| Advisor: | Milton Groppo Junior; Daniela Cristina Zappi |
| Abstract | |
Systematics of Rubiaceae has undergone major changes during the last two decades. The use of molecular data has lead to a profound revision in the intra-familiar classification, mainly at generic level. It has become clear that the relationships between some of the largest genera of Neotropical Rubiaceae (e.g. Psychotria, Palicourea and Rudgea) had to be investigated. The neotropical genus Rudgea encompasses c. 130 species distributed from Mexico to northeastern Argentina with two main centers of diversity, one in the western portion of South America and another in southeastern Brazil. The species are characterized by the entire to fimbriate stipules, with glandular appendages, presence of domatia in the leaves, terminal inflorescence, corniculate corolla-lobes and pyrenes deeply furrowed adaxially. Previous Rubiaceae phylogenies have included a limited sample of Rudgea species. Our molecular analyses have shown Rudgea as a monophyletic genus with the exclusion of R. woronovii, a species more closely related to Palicourea sensu lato. On the other hand, R. stipulacea appears as sister to all other Rudgea, this last group strongly supported and formed by the species of \"Rudgea sensu stricto\". Taxonomic changes will be necessary to accommodate R. stipulacea and an infrageneric classification of Rudgea will be proposed, with molecular and morphological support. Besides the phylogenetic analyses, it was also conducted a taxonomic study for the Brazilian species of Rudgea, with 64 species accepted species and 26 new synonyms proposed. Comprehensive nomenclatural information is supplied and 36 lectotypes are designated. Identification key for the species and subspecies (where appropriate) are provided and information on geographical distribution, habitat, phenology, taxonomic notes, examined material and illustrations are also provided. This is the first comprehensive treatment of Rudgea for Brazil since Mueller Argoviensis published the Flora Brasiliensis monograph in 1881. As part of the taxonomic studies with Rudgea, the manuscript comprising the descriptions of two new species from Bahia (Brazil) and the manuscript with new combinations in Rudgea and Palicourea sensu lato were also included in this thesis (AU) | |
| FAPESP's process: | 10/18172-4 - Systematics and taxonomy of Rudgea Salisb. (Psychotrieae, Rubiaceae) |
| Grantee: | Carla Poleselli Bruniera |
| Support Opportunities: | Scholarships in Brazil - Doctorate |