Rethinking the pollination syndromes in Hymenaea (Leguminosae): the role of anthesis in the diversification
| Autor: | Isys Mascarenhas Souza, Frederic Mendes Hughes, Luciano Paganucci de Queiroz, Ligia Silveira Funch |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Anais da Academia Brasileira de Ciências, Vol 93, Iss 4 (2021) Anais da Academia Brasileira de Ciências v.93 n.4 2021 Anais da Academia Brasileira de Ciências Academia Brasileira de Ciências (ABC) instacron:ABC Anais da Academia Brasileira de Ciências, Volume: 93, Issue: 4, Article number: e20191446, Published: 22 OCT 2021 |
| ISSN: | 1678-2690 |
| Popis: | Floral traits associated with functional groups of pollinators have been largely employed to understand mechanisms of floral diversification. Hymenaea is a monophyletic legume genus widely recognized to being bat-pollinated, with nocturnal anthesis and copious nectar. The most of species has short-paniculate inflorescences, white and robust flowers, congruent with a bat-pollination syndrome. However, other Hymenaea species show a different floral pattern (e.g., long-paniculate inflorescences and smaller flowers) which we report here as being bird pollinated. We examined the floral traits and visitors of Hymenaea oblongifolia var. latifolia and identified evolutionary shifts in floral traits associated with potential pollinators of Hymenaea species. Floral traits of H. oblongifolia var. latifolia differ from those expected for bat-pollinated flowers in species of sect. Hymenaea, and we observed hummingbirds collecting nectar legitimately. Our phylogenetic analysis did not support the monophyly of the taxonomic sections and suggests that bat pollination is ancestral in Hymenaea, with bird pollination evolving later. The transition coupling with shifts in the timing of anthesis and other floral traits. Pollinator-mediated evolutionary divergence hypothesis partially explains the Hymenaea diversification in the Neotropics. It is congruent with those species shifting from traits linked traditionally to bat pollination to hummingbird pollination. |
| Databáze: | OpenAIRE |
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