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| Pinheiro-Costa,Bruna Karen; Mesquita-Neto,José Neiva; Rego,Juliana Ordones; Schlindwein,Clemens. |
| ABSTRACT Heteranthery, the presence of different types of stamens in a flower, may reduce the conflict between pollinators and plants by ensuring the resource for the pollinator without drastically affecting the availability of viable male gametes for fertilization, according to the division-of-labor hypothesis. We investigated whether the poricidal anthers of Senna pendula, a buzz-pollinated heterantherous species, present morphological and physiological differences among pollen grains from the three sets of stamens. We compared quantity, ornamentation, size and fecundity of pollen from long, medium and short stamens. The short feeding stamens produced larger but fewer pollen grains than the long pollinating stamens, which produced smaller pollen grains... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bees; Buzz-pollination; Division-of-labor; Heteranthery; Pollen economy; Senna pendula; Stamen dimorphism. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300446 |
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| Velloso,Mariana de Souza Carvalho; Brito,Vinícius Lourenço Garcia de; Caetano,Ana Paula Souza; Romero,Rosana. |
| ABSTRACT In heterantherous flowers, some anthers have an attraction and feeding function, while others are related to plant reproduction. Microlicia cordata has dimorphic stamens organized in two cycles: the antesepalous one with large stamens and pink anthers, and the antepetalous one with small stamens and yellow anthers. Division of labor was analyzed using the parameters of structure, composition, amount and estimated viability of pollen, and the color of floral parts. The anthers of the pollinating stamens were larger than the anthers of the feeding stamens, although anatomically similar. There was a difference in the amount of pollen produced by the anthers of the two cycles, but no difference was found in pollen viability. Considering a bee color... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Color vision; Division of labor; Heteranthery; Microlicia; Pollen dilemma; Poricidal anthers. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300349 |
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