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| Author(s): |
Cintia Neves de Souza
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Jaboticabal. 2017-07-04. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal |
| Defense date: | 2017-05-04 |
| Advisor: | Eduardo Custódio Gasparino; Andréa Onofre de Araujo |
| Abstract | |
Gloxiniinae have 21 genera and about 160 species. In Brazil, Gloxiniinae has 16 species, distributed in eight genera, three of which are endemic, generally found in rock outcrops of cerrado, rupestrian fields or gallery forests. We studied the pollen grains of ten Brazilian Gloxiniinae (Gesneriaceae) belonging to the genera: Chautemsia A.O.Araujo & V.C.Souza (1 sp.), Gloxinia L'Hér. (3 spp.), Goyazia Taub. (2 spp.), Mandirola Decne. (3 spp.) and Seemannia Regel (1 sp.) with the aim of contributing to the taxonomic characterization of the group and a better delimitation of the genera and/or species, focusing on the Mandirola-Goyazia complex populations. The species of this complex are not well delimited in taxonomic studies and phylogeny works, and this difficulty can be explained by the sympatric distribution, and the floral morphology and phenology very similar. The pollen grains were acetolysed, measured, photographed under light microscopy, scanning and transmission electron microscopy and described qualitatively. The quantitative data were analyzed by descriptive and multivariate statistics. We observed for the Brazilian Gloxiniinae species variations on the amb, shape, length and width colpi, colpi end, margo, endoaperture and ornamentation. For the 36 natural populations of Mandirola and Goyazia, qualitative data such as number and type of apertures, endoaperture, margo, ornamentaion and exine utrastructure are very similar, but we identify differences in amb, shape, length and width of colpi and the colpi ends. We also analyzed the pollen morphology of the natural hybrid Mandirola X Goyazia and its possible parents (Chapada dos Guimarães, Mato Grosso), and we observed similar pollen characteristics, with variations for amb, shape, colpi ends and exine ornamentation. There are pollen morphology characters that allow to separate the Gloxiniiinae species; the populations of Mandirola and Goyazia are stenopalynous, and the natural hybrid has differences in the exine ornamentation not observed in its possible parental. (AU) | |
| FAPESP's process: | 15/02707-0 - Palynotaxonomy in Brazilian species of Gloxiniinae with emphasis on Mandirola-Goyazia complex |
| Grantee: | Cintia Neves de Souza |
| Support Opportunities: | Scholarships in Brazil - Master |