Anther specializations related to the division of labor in Microlicia cordata (Spreng.) Cham. (Melastomataceae)
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 vision model, the color of the anthers of the pollinating stamens contrasted less with that of the corolla, and thus is probably less attractive to visitors. Conversely, the anthers of the feeding stamens and the ventral appendage of the connective of the pollinating stamens contrasted more with the corolla, presenting the same color to the pollinators. These results are in accordance with the idea of division of labor among anthers of heterantherous flowers, especially regarding the quantity of pollen and the color of the floral parts.
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Sociedade Botânica do Brasil
2018
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oai:scielo:S0102-330620180003003492018-09-11Anther specializations related to the division of labor in Microlicia cordata (Spreng.) Cham. (Melastomataceae)Velloso,Mariana de Souza CarvalhoBrito,Vinícius Lourenço Garcia deCaetano,Ana Paula SouzaRomero,Rosana color vision division of labor heteranthery Microlicia pollen dilemma poricidal anthers 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 vision model, the color of the anthers of the pollinating stamens contrasted less with that of the corolla, and thus is probably less attractive to visitors. Conversely, the anthers of the feeding stamens and the ventral appendage of the connective of the pollinating stamens contrasted more with the corolla, presenting the same color to the pollinators. These results are in accordance with the idea of division of labor among anthers of heterantherous flowers, especially regarding the quantity of pollen and the color of the floral parts.info:eu-repo/semantics/openAccessSociedade Botânica do BrasilActa Botanica Brasilica v.32 n.3 20182018-09-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300349en10.1590/0102-33062017abb0358 |
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Velloso,Mariana de Souza Carvalho Brito,Vinícius Lourenço Garcia de Caetano,Ana Paula Souza Romero,Rosana |
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Velloso,Mariana de Souza Carvalho Brito,Vinícius Lourenço Garcia de Caetano,Ana Paula Souza Romero,Rosana Anther specializations related to the division of labor in Microlicia cordata (Spreng.) Cham. (Melastomataceae) |
author_facet |
Velloso,Mariana de Souza Carvalho Brito,Vinícius Lourenço Garcia de Caetano,Ana Paula Souza Romero,Rosana |
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Velloso,Mariana de Souza Carvalho |
title |
Anther specializations related to the division of labor in Microlicia cordata (Spreng.) Cham. (Melastomataceae) |
title_short |
Anther specializations related to the division of labor in Microlicia cordata (Spreng.) Cham. (Melastomataceae) |
title_full |
Anther specializations related to the division of labor in Microlicia cordata (Spreng.) Cham. (Melastomataceae) |
title_fullStr |
Anther specializations related to the division of labor in Microlicia cordata (Spreng.) Cham. (Melastomataceae) |
title_full_unstemmed |
Anther specializations related to the division of labor in Microlicia cordata (Spreng.) Cham. (Melastomataceae) |
title_sort |
anther specializations related to the division of labor in microlicia cordata (spreng.) cham. (melastomataceae) |
description |
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 vision model, the color of the anthers of the pollinating stamens contrasted less with that of the corolla, and thus is probably less attractive to visitors. Conversely, the anthers of the feeding stamens and the ventral appendage of the connective of the pollinating stamens contrasted more with the corolla, presenting the same color to the pollinators. These results are in accordance with the idea of division of labor among anthers of heterantherous flowers, especially regarding the quantity of pollen and the color of the floral parts. |
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Sociedade Botânica do Brasil |
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2018 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300349 |
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