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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleDiplospory and obligate apomixis in Miconia albicans (Miconieae, Melastomataceae) and an embryological comparison with its sexual congener M-chamissoispt_BR
dc.contributor.authorCaetano, APSpt_BR
dc.contributor.authorSimao, DGpt_BR
dc.contributor.authorCarmo-Oliveira, Rpt_BR
dc.contributor.authorOliveira, PEpt_BR
unicamp.author.emailpoliveira@ufu.brpt_BR
unicamp.authorSouza Caetano, Ana Paula Univ Estadual Campinas, Programa Posgrad Biol Vegetal, Inst Biol, BR-13083970 Sao Paulo, Brazilpt_BR
unicamp.authorSimao, Daniela Guimaraes Carmo-Oliveira, Renata Oliveira, Paulo Eugenio Univ Fed Uberlandia, Inst Biol, BR-38400902 Uberlandia, MG, Brazilpt_BR
dc.subjectObligate apomixispt_BR
dc.subjectMelastomataceaept_BR
dc.subjectMiconiapt_BR
dc.subjectEmbryologypt_BR
dc.subject.wosMale-sterilitypt_BR
dc.subject.wosPlantspt_BR
dc.subject.wosMemecylaceaept_BR
dc.subject.wosPolyembryonypt_BR
dc.subject.wosDandelionspt_BR
dc.subject.wosEvolutionpt_BR
dc.subject.wosMeiosispt_BR
dc.subject.wosCerradopt_BR
dc.description.abstractApomixis, or asexual reproduction through seeds, has been reported for species of the tribe Miconieae, Melastomataceae, but details of the process have yet to be described. We analyzed and compared sporogenesis and gametogenesis in the apomictic Miconia albicans and the sexual M. chamissois. The results point to some differences between species, which were related to the apomictic process. In M. albicans microsporogenesis, problems during meiosis and degeneration of its products led to total pollen sterility, while M. chamissois presented normal bicellular pollen grains in the mature anther. The absence or abnormality of meiosis in M. albicans megasporogenesis led to the formation of an unreduced embryo sac and also to egg cell parthenogenesis, which gave rise to the apomictic embryo. Embryo and endosperm development were autonomous, resulting in seeds and fruits independent of pollination and fertilization. Thus, in this species, apomixis can be classified as diplosporic and obligate. In contrast, meiosis was as expected in the sexual M. chamissois, and led to the development of a reduced embryo sac. Despite the divergent pathways, many embryological characteristics were similar between the studied species and other Melastomataceae and they seem to be conservative character states for the family.pt
dc.relation.ispartofPlant Systematics And Evolutionpt_BR
dc.relation.ispartofabbreviationPlant Syst. Evol.pt_BR
dc.publisher.cityWienpt_BR
dc.publisher.countryAustriapt_BR
dc.publisherSpringer Wienpt_BR
dc.date.issued2013pt_BR
dc.date.monthofcirculationAUGpt_BR
dc.identifier.citationPlant Systematics And Evolution. Springer Wien, v. 299, n. 7, n. 1253, n. 1262, 2013.pt_BR
dc.language.isoenpt_BR
dc.description.volume299pt_BR
dc.description.issuenumber7pt_BR
dc.description.initialpage1253pt_BR
dc.description.lastpage1262pt_BR
dc.rightsfechadopt_BR
dc.rights.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0pt_BR
dc.sourceWeb of Sciencept_BR
dc.identifier.issn0378-2697pt_BR
dc.identifier.wosidWOS:000322031800005pt_BR
dc.identifier.doi10.1007/s00606-013-0793-ypt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorship1Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.date.available2014-07-30T14:51:38Z
dc.date.available2015-11-26T16:32:17Z-
dc.date.accessioned2014-07-30T14:51:38Z
dc.date.accessioned2015-11-26T16:32:17Z-
dc.description.provenanceMade available in DSpace on 2014-07-30T14:51:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2013en
dc.description.provenanceMade available in DSpace on 2015-11-26T16:32:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2013en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/62565
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/62565-
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