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Anatomy, histochemistry and evolution of secretory structures and floral rewards in Oncidiinae (Orchidaceae)

Grant number: 11/12720-2
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): September 01, 2011
Effective date (End): December 31, 2014
Field of knowledge:Biological Sciences - Botany - Plant Morphology
Principal Investigator:Isabel Alves dos Santos
Grantee:Ludmila Mickeliunas Pansarin
Host Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Oncidiinae is one of the largest and most important subtribes of Maxillarieae, comprising more than 1,000 species in about 70 genera. Representatives of this group can be found throughout the Americas, most frequently in tropical regions, with many representatives endemic to Brazil. In this study we will study the anatomy and histochemistry of 20 species of Oncidiinae to characterize the structure of floral glands and determine the tissues involved in secretion, as well as the chemical nature of floral resources offered to pollinators. The data obtained here for Oncidiinae species will be added to those already published for the subtribe to prepare a study on the evolution of floral structures that produce rewards offered to pollinators. For this study we will develop a phylogenetic hypothesis using characters obtained from the sequencing of psbA and matK regions of chloroplast DNA and ITS from nuclear DNA. Are also used sequences available in GenBank. The study of evolution of structures that produce rewards will be held from the program Mesquite. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PANSARIN, EMERSON R.; PANSARIN, LUDMILA M.; ALVES-DOS-SANTOS, ISABEL. Floral features, pollination biology, and breeding system of Comparettia coccinea (Orchidaceae: Oncidiinae). FLORA, v. 217, p. 57-63, . (07/07445-7, 11/12720-2)
PANSARIN, E. R.; ALVES-DOS-SANTOS, I.; PANSARIN, L. M.. Comparative reproductive biology and pollinator specificity among sympatric Gomesa (Orchidaceae: Oncidiinae). Plant Biology, v. 19, n. 2, p. 147-155, . (14/14969-6, 11/12720-2)
PANSARIN, L. M.; PANSARIN, E. R.; ALVES-DOS-SANTOS, I.; TEIXEIRA, S. P.. So small and so rich: diversity of floral resources in miniature Oncidiinae (Orchidaceae) and their relation to pollinators. Plant Biology, v. 23, n. 2, . (11/12720-2)

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