Contribution to the embryology of Leiothrix fluitans (Eriocaulaceae : Poales)

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dc.contributor.authorCoan, Alessandra Ike
dc.contributor.authorRosa, Michele Marcelino
dc.contributor.authorScatena, Vera Lucia
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-02-26T16:59:39Z
dc.date.accessioned2014-05-20T13:56:38Z
dc.date.available2014-02-26T16:59:39Z
dc.date.available2014-05-20T13:56:38Z
dc.date.issued2007-08-01
dc.description.abstractThis paper presents a contribution to the understanding of the embryology, especially microsporogenesis, the antipodal cell behavior, and the early stages of the micropylar seed operculum, in Leiothrix fluitans, to elucidate these aspects both within the subgenus Rheocaulon and within the genus in Eriocaulaceae. Contrarily to previous descriptions of this same species, our results show the following: microsporogenesis is of the successive type and results in isobilateral microspore tetrads; the antipodal cells gradually fuse together to form a conspicuous cyst; and the inner integument, which does not develop into an endothelium, shows evidence of the initiation of the seed operculum in its micropylar end. Such features are common to the family as a whole. Evidenced for the first time in the family, the chalazal end of the ovule differentiates into a hypostase closely associated to the antipodal cyst. These overall features of L. fluitalls point out previous misinterpretations on some of its embryological aspects, especially those concerning the only report of simultaneous microsporogenesis and proliferation of the antipodal cells. Furthermore, the results presented here allow us to reinforce the uniformity of the embryological aspects within the Eriocaulaceae, strengthening the cystic arrangement of the antipodal cells as a potential autapomorphy of the family within the other Poales (commelinids). (C) 2007 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Dept Bot, Inst Biociencias, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Bot, Inst Biociencias, BR-13506900 Rio Claro, SP, Brazil
dc.format.extent155-160
dc.identifierhttp://dx.doi.org/10.1016/j.aquabot.2007.04.001
dc.identifier.citationAquatic Botany. Amsterdam: Elsevier B.V., v. 87, n. 2, p. 155-160, 2007.
dc.identifier.doi10.1016/j.aquabot.2007.04.001
dc.identifier.issn0304-3770
dc.identifier.lattes2454528048086769
dc.identifier.urihttp://hdl.handle.net/11449/20248
dc.identifier.wosWOS:000248584500009
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofAquatic Botany
dc.relation.ispartofjcr1.787
dc.relation.ispartofsjr0,766
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectantipodal cystpt
dc.subjectcommelinidspt
dc.subjectmicrosporogenesispt
dc.subjectpollen grainpt
dc.subjectseed operculumpt
dc.titleContribution to the embryology of Leiothrix fluitans (Eriocaulaceae : Poales)en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes2454528048086769
unesp.author.lattes5838426864167473[1]
unesp.author.orcid0000-0002-8584-1700[1]
unesp.author.orcid0000-0001-8354-3331[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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