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| Author(s): |
José Elvino do Nascimento Júnior
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia |
| Defense date: | 2017-01-30 |
| Examining board members: |
Maria do Carmo Estanislau do Amaral;
Jose Eduardo Lahoz da Silva Ribeiro;
Fábio Pinheiro;
Ingrid Koch;
Michael John Gilbert Hopkins
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| Advisor: | Maria do Carmo Estanislau do Amaral |
| Abstract | |
Clusia is a Neotropical genus containing about 300 species of shrubs and trees with habit terrestrial, rupicolous or hemiepiphytic. Although the genus has little morphological diversity in its vegetative structures, floral morphology is highly variable even among species of the same section. One of the most notable floral features in Clusia is the presence of secretion of resin by stamens and staminodes, a rare attribute between Angiosperms. On the other hand, a great number of species of Clusia do not secrete resin in their flowers, and the absence of resin is a state of character distributed in several branches in phylogenies of Clusia, especially in the sect. Anandrogyne, in a set of Central American species called Flava group, and in six sections that form a monophyletic group which we call Criuva clade. The Criuva clade is composed by sections Brachystemon, Criuva, Criuvopsis, Havetiopsis, Quapoya and Oedematopus, the last three were treated as genera during most of the taxonomic history of Clusiaceae. The sections that form Criuva clade are among the least studied of the genus Clusia, in part because they inhabit places difficult to access, such as Tepuis of Venezuela, or grow as hemiepiphytes in the Amazon forest. In addition to being little known taxonomically, these sections have their pollination biology practically uninvestigated. The two studies to date show that the pollination systems of these sections may be very different from those presented by species that have resinous flowers, which are pollinated mainly by small bees. In order to increase the taxonomic knowledge of this group and to verify the pollination systems of some species, we carried out taxonomic revisions of sections and we study the pollination biology for three species. For taxonomic reviews, we visited dozens of herbaria and conducted field expeditions in eastern Brazil and central and western Amazonia. Among the main results are the proposition of 14 new species and four new combinations, besides several synonimizations, lectotipifications and changes of positioning for different sections. In relation to the pollination biology studies we describe a new pollination system for Clusiaceae, which is based on the transfer of pollen during the ovoposition of beetles of several species. In addition, we have broadened our understanding of pollination conducted by cockroaches, one of the most peculiar and least understood types of pollination (AU) | |
| FAPESP's process: | 12/15542-0 - Taxonomic, evolutionary and ecobiogeographic studies in "Clade Criuva" (Clusia L., Clusiaceae) |
| Grantee: | José Elvino Do Nascimento Júnior |
| Support Opportunities: | Scholarships in Brazil - Doctorate |