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Floral biology and investigation of the occurrence of natural hybridization between Epidendrum secundum and e. denticulatum in the Cerrado vegetation of Itirapina - SP

Grant number: 12/13522-2
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): August 01, 2012
Effective date (End): July 31, 2013
Field of knowledge:Biological Sciences - Botany - Applied Botany
Principal Investigator:Emerson Ricardo Pansarin
Grantee:Bruno César Vieira
Home Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil


Epidendrum Lindl. is a neotropical genus comprising 1125 species distributed from the southeastern United States (North Carolina) and Argentina. About 132 species can be found in Brazil. The delimitation of species within the genus is often the subject of controversy, since many of them are quite variable morphologically and form species complexes, such as "Epidendrum secundum complex". The species analyzed in this work are E. secundum Jacq. and E. denticulatum. Barb. Rodr., which are sympatric in cerrado areas in the municipality of Itirapina-SP. Will investigate the floral biology of the species through studies of floral morphology and histochemical tests allegedly regions producer of resources for pollinators. Also, will be performed intraspecific pollination (cross-pollination, emasculation, hand self-pollination and spontaneous self-pollination) and interspecific. From the obtained fruits, will be evaluated amount of viable seeds resulting from each treatment. The data from this study will contribute to the understanding of nectary functionality, so as to evaluate the possibility of natural hybridization between both species, since various intermediate forms between E. secundum and E. denticulatum can be found occurring in the region.

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)
VIEIRA, B. C.; PANSARIN, L. M.; MARTUCCI, M. E. P.; GOBBO-NETO, L.; PANSARIN, E. R. Pollinarium size as a hybridisation barrier between sympatric inter-compatible orchids. Australian Journal of Botany, v. 65, n. 6-7, p. 497-506, 2017. Web of Science Citations: 3.

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