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dc.contributor.authorBittencourt, Nelson Sabino-
dc.contributor.authorPereira, Eduardo Joao-
dc.contributor.authorSao-Thiago, Paula de Souza-
dc.contributor.authorSemir, Joao-
dc.date.accessioned2014-05-20T15:31:49Z-
dc.date.accessioned2016-10-25T18:07:48Z-
dc.date.available2014-05-20T15:31:49Z-
dc.date.available2016-10-25T18:07:48Z-
dc.date.issued2011-01-01-
dc.identifierhttp://dx.doi.org/10.1016/j.flora.2011.05.004-
dc.identifier.citationFlora. Jena: Elsevier Gmbh, Urban & Fischer Verlag, v. 206, n. 10, p. 872-886, 2011.-
dc.identifier.issn0367-2530-
dc.identifier.urihttp://hdl.handle.net/11449/40859-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/40859-
dc.description.abstractBignoniaceous woody species are very important ecological components of neotropical forests, but the reproductive biology of many species, such as Cybistax antisyphilitica, remains virtually unknown. Most species of Bignoniaceae are characteristically self-sterile, despite typically exhibiting normal pollen tube growth throughout the style, combined with slow rates of ovule penetration, fertilisation and endosperm initiation in selfed pistils. Uniform abortion occurs within a few days of anthesis, indicating the occurrence of late-acting self-incompatibility (LSI). However, breeding system studies have been performed in fewer than 7% of species, and other types of breeding systems (e.g., self-compatibility and apomixis) have been reported in this family. In the present study, the reproductive biology of C. antisyphilitica was investigated by field observation of flower visitors and floral events. Moreover, reproductive biology of this species was examined through experimental pollinations, analyses of pollen tube growth and ovule penetration using fluorescence microscopy, verification of pistil longevity, and a histological analysis of unpollinated vs. self-pollinated pistils. Finally, morphological aspects, quantities and germination were investigated in seeds that resulted from different pollination treatments. Natural pollination was effected by large-and medium-sized bees, and their visiting behaviour favours a high proportion of geitonogamy and no pollen limitation. Self-pollinated flowers produced no fruits, and all of the characteristic post-pollination events cited above were verified, witnessing the occurrence of LSI with post-zygotic rejection of selfed pistils in C. antisyphilitica. Although some indications of extended pistil longevity were found in selfed pistils, this feature seemed to be affected by unidentified environmental factors. The seeds were always monoembryonic and with high viability. A larger variation in the number of viable seeds was found in fruits derived from natural pollination. A low fruit set was observed after both natural and cross-pollination, and most crossed fruits underwent abortion at several points during the juvenile phase, even when protected against herbivory. The formation of surplus flowers/juvenile fruits and the apparently wasteful selfing mechanism control implied in LSI are discussed in the context of the perennial life style of tropical woody plant species. (C) 2011 Elsevier GmbH. All rights reserved.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.description.sponsorshipFundo de Apoio ao Ensino e a Pesquisa - Universidade Estadual de Campinas-
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)-
dc.format.extent872-886-
dc.language.isoeng-
dc.publisherElsevier Gmbh, Urban & Fischer Verlag-
dc.sourceWeb of Science-
dc.subjectLate-acting self-incompatibilityen
dc.subjectPistil longevityen
dc.subjectFloral biologyen
dc.subjectBreeding systemen
dc.subjectLow fruit seten
dc.titleThe reproductive biology of Cybistax antisyphilitica (Bignoniaceae), a characteristic tree of the South American savannah-like "Cerrado" vegetationen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Federal de Viçosa (UFV)-
dc.contributor.institutionFundação Ezequiel Dias-
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)-
dc.description.affiliationUniv Estadual Paulista UNESP, IBILCE, Dept Bot & Zool, BR-15054000 São Paulo, Brazil-
dc.description.affiliationUniversidade Federal de Viçosa (UFV), Dept Biol Vegetal, BR-36570000 Vicosa, MG, Brazil-
dc.description.affiliationFundação Ezequiel Dias, Lab Recursos Vegetais & Opoterap, BR-30510010 Belo Horizonte, MG, Brazil-
dc.description.affiliationUniv Estadual Campinas UNICAMP, Dept Bot, BR-13083970 Campinas, SP, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista UNESP, IBILCE, Dept Bot & Zool, BR-15054000 São Paulo, Brazil-
dc.description.sponsorshipIdFAPESP: 05/59234-4-
dc.description.sponsorshipIdFAEPEX: 280/00-
dc.description.sponsorshipIdFAPEMIG: EDT-2184/03-
dc.identifier.doi10.1016/j.flora.2011.05.004-
dc.identifier.wosWOS:000296939800004-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofFlora-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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