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| Author(s): |
Diego Ismael Rocha
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: | 2015-03-30 |
| Examining board members: |
Marcelo Carnier Dornelas;
Isabela Galarda Varassin;
Juliana Lischka Sampaio Mayer;
Tamara Canto Fonseca;
Marlies Sazima
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| Advisor: | Marcelo Carnier Dornelas |
| Abstract | |
In Passiflora, the great variability of floral structures and colours allowed adaptation of these species to different types of pollinators. In general, species pollinated by the same group of animals exhibit a set of characters that determine these pollination systems. This study aimed to characterize the development of unique floral structures of the genus (androgynophore and corona), as well as the biochemical aspects (colour, scent and nectar) of species with different pollination systems (ornithophily and chiropterophily) and in interspecific hybrids obtained between of them. Our analyzes have shown that both, morphology and nectar composition from ornithophilous (P. coccinea - red flower) and chiropterophilous species (P. setacea - white flower) are contracting, and these resources according to their pollination systems. In hybrids, not all features were intermediate in relation to the parental species. The bend androgynophore, commonly observed in the Passiflora species pollinated by bats was assigned in response to the physical barrier exerted by the perianth and the redistribution of auxin in tissues of that structure. Regarding colour, the hybrids showed different shades of red staining in comparison to the scarlet red observed in P. coccinea. However, the diversity of pigmentation characterized in these Passiflora genotypes could be explained by the combination of specific molecules anthocyanins accumulated in their petals. Regarding scent composition, hybrids showed a similar composition to the P. coccinea and, it was not observed heritability of characteristic P. setacea compounds (benzenoids). Possible correlation between colour and scent has been suggested. It is believed that these results may contribute to understanding the evolution of these pollination systems within the genus Passiflora (AU) | |