Embryology and seed development of Blastocaulon scirpeum and Paepalanthus scleranthus (Eriocaulaceae)

Página do item simplificado
dc.contributor.authorCoan, A. I.
dc.contributor.authorScatena, V. L.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-02-26T17:18:00Z
dc.date.accessioned2014-05-20T13:56:38Z
dc.date.available2014-02-26T17:18:00Z
dc.date.available2014-05-20T13:56:38Z
dc.date.issued2004-01-01
dc.description.abstractThe embryology and seed structure of Blastocaulon scirpeum (Mart.) Giul. and Paepalanthus scleranthus Ruhland were studied in order to contribute to the embryology of Eriocaulaceae and supply data for future taxonomic studies. Both species present: anther with 4-layered wall; conspicuous endothecium with fibrous thickenings; secretory tapetum with uninucleate cells; successive microsporogenesis forming isobilateral microspore tetrads; bicellular pollen grains; orthotropous, bitegmic and tenuinucellate ovule; micropyle formed by the inner integument alone; megagametophyte of the Polygonum type, with a conspicuous antipodal cyst; nuclear and starchy endosperm; reduced, undifferentiated, and bell-shaped embryo; operculate and endotestal seed; seed coat derived from the two ovule integuments; and tanniniferous endotegmen. In addition, Blastocaulon scirpeum shows a bisporangiate anther and a 3-layered ovary wall, while P. scleranthus presents a tetrasporangiate anther that becomes bisporangiate at maturity, and a 2-layered ovary wall. This investigation shows that the bisporangiate condition does not suffice to separate Blastocaulon from Paepalanthus, since it is common to both. It also indicates, based on several embryological aspects, the proximity of Eriocaulaceae and Xyridaceae, which comply mainly with the features presented by the other commelinid families. These results may be used in future cladistic analysis of the family, and contribute to a better understanding of its phylogeny.en
dc.description.affiliationUniv Estadual Paulista, UNESP, Inst Biociencias, Dept Bot, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Inst Biociencias, Dept Bot, BR-13506900 Rio Claro, SP, Brazil
dc.format.extent47-57
dc.identifierhttp://dx.doi.org/10.1078/0367-2530-00124
dc.identifier.citationFlora. Jena: Urban & Fischer Verlag, v. 199, n. 1, p. 47-57, 2004.
dc.identifier.doi10.1078/0367-2530-00124
dc.identifier.issn0367-2530
dc.identifier.lattes2454528048086769
dc.identifier.urihttp://hdl.handle.net/11449/20249
dc.identifier.wosWOS:000189175400006
dc.language.isoeng
dc.publisherUrban & Fischer Verlag
dc.relation.ispartofFlora
dc.relation.ispartofjcr1.365
dc.relation.ispartofsjr0,570
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectEriocaulaceaept
dc.subjectembryologypt
dc.subjectseed developmentpt
dc.subjectBlastocaulon scirpeumpt
dc.subjectPaepalanthus scleranthuspt
dc.subjectmonocotyledonspt
dc.titleEmbryology and seed development of Blastocaulon scirpeum and Paepalanthus scleranthus (Eriocaulaceae)en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderUrban & Fischer Verlag
unesp.author.lattes2454528048086769
unesp.author.lattes5838426864167473[1]
unesp.author.orcid0000-0002-8584-1700[1]
unesp.author.orcid0000-0001-8354-3331[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

Arquivos

Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:

Coleções

Artigos - Botânica - IBRC