| Registro completo |
| Provedor de dados: |
Acta Botanica
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| País: |
Brazil
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| Título: |
A new case of late-acting self-incompatibility in Capparis L. (Brassicaceae): C. jacobinae Moric. ex Eichler, an endemic andromonoecious species of the Caatinga, Pernambuco State, Brazil
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| Autores: |
Primo,Luis Miguel
Machado,Isabel Cristina
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| Data: |
2009-09-01
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| Ano: |
2009
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| Palavras-chave: |
Andromonoecy
Capparaceae
Pollen-ovule ratio
Pollen tube growth
Sexual system
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| Resumo: |
We studied the reproductive system of Capparis jacobinae Moric ex Eichler (Brassicaceae), based on controlled hand-pollination and observation of pollen tube growth made in a fluorescence microscope. Of 105 self-pollinated flowers only one produced fruits (success = 0.95%), all the other flowers abscised at the same time, between the eighth and tenth day after anthesis. Nevertheless, self- and cross-pollinated pollen tubes reached the micropyle. The rate of penetrated ovules in self-pollinated flowers was lower during the first 24 h after pollination; thereafter this rate was similar between self- and cross-pollinated flowers for treatments of 48 h, 72 h and 96 h after pollination. In addition, we carried out two indirect estimates of the reproductive system, based on pollen/ovule and seed/ovule ratios, which resulted in typical features of xenogamous species. We concluded that C. jacobinae has a late-acting self-incompatibility system. This is the third record of this mechanism for the genus and the first for a species of Capparis endemic to the Caatinga. We suggest that this self-incompatibility system may occur in other species of the same genus and family.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000300016
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| Editor: |
Sociedade Botânica do Brasil
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| Relação: |
10.1590/S0102-33062009000300016
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| Formato: |
text/html
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| Fonte: |
Acta Botanica Brasilica v.23 n.3 2009
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| Direitos: |
info:eu-repo/semantics/openAccess
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