Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/195368
Type: Artigo de periódico
Title: Histological Study Of Post-pollination Events In Spathodea Campanulata Beauv. (bignoniaceae), A Species With Late-acting Self-incompatibility.
Author: Bittencourt, Nelson S
Gibbs, Peter E
Semir, João
Abstract: The reproductive biology of Spathodea campanulata was investigated by means of hand-pollination experiments, observations of pollen tube growth using fluorescence microscopy, and serial sections of ovules in selfed and crossed pistils. Only cross-pollinated flowers developed fruits, and all selfed flowers abscised within 3-4 d. However, self pollen tubes grew successfully to the ovary, penetrating and fertilizing the majority of ovules by 48 h, indicating that S. campanulata is a species with late-acting self-incompatibility. The incidences of ovule penetration, fertilization and endosperm initiation were all significantly slower in selfed vs. crossed pistils, although no other signs of malfunctioning were detected. The possible role of such slow self pollen tube effectiveness as a recognition event is discussed within the context of the slow but not entirely suppressed self pollen tube growth reported for some species with conventional homomorphic self-incompatibility.
Subject: Bignoniaceae
Cell Division
Crosses, Genetic
Fertility
Flowers
Microscopy, Confocal
Pollen
Seeds
Rights: fechado
Identifier DOI: 10.1093/aob/mcg088
Address: http://www.ncbi.nlm.nih.gov/pubmed/12730069
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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