Morphological evolution in the graminid clade: Comparative floral anatomy of the grass relatives Flagellariaceae and Joinvilleaceae

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dc.contributor.authorSajo, M. Graça [UNESP]
dc.contributor.authorRudall, Paula J.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionRoyal Botanic Gardens
dc.date.accessioned2014-05-27T11:27:08Z
dc.date.available2014-05-27T11:27:08Z
dc.date.issued2012-11-01
dc.description.abstractNew comparative data are presented on the reproductive morphology and anatomy of two genera closely related to grasses, Flagellaria and Joinvillea, in which the flowers are superficially similar, especially in stamen morphology. This investigation demonstrates some anatomical differences between the two genera. For example, both genera depart from the 'typical' condition of tepal vasculature (three-traced outer tepals and one-traced inner tepals): in Flagellaria, each tepal receives a single vascular bundle and, in Joinvillea, each tepal is supplied by three vascular bundles. Joinvillea possesses supernumerary carpel bundles, as also found in the related family Ecdeiocoleaceae, but not in Flagellaria or grasses. In the anther, the tapetum degenerates early in Flagellaria, and is relatively persistent in Joinvillea, in which the pollen grains remain closely associated with the tapetum inside the anther locule, indicating a correlation between peripheral pollen (a feature that is common in grasses) and a persistent tapetum. This study highlights the presence of a pollen-tube transmitting tissue (PTTT) or solid style in the gynoecium of Flagellaria, as also in many Poaceae, but not in Joinvillea or Ecdeiocoleaceae. We speculate that the presence of a PTTT could represent one of the factors that facilitated the subsequent evolution of the intimately connected gynoecia that characterize grasses. © 2012 The Linnean Society of London.en
dc.description.affiliationDepto Botânica IBUNESP, C. Postal 199, CEP 13506-900 Rio Claro, SP
dc.description.affiliationRoyal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB
dc.description.affiliationUnespDepto Botânica IBUNESP, C. Postal 199, CEP 13506-900 Rio Claro, SP
dc.format.extent393-404
dc.identifierhttp://dx.doi.org/10.1111/j.1095-8339.2012.01283.x
dc.identifier.citationBotanical Journal of the Linnean Society, v. 170, n. 3, p. 393-404, 2012.
dc.identifier.doi10.1111/j.1095-8339.2012.01283.x
dc.identifier.issn0024-4074
dc.identifier.issn1095-8339
dc.identifier.lattes2126319926799273
dc.identifier.scopus2-s2.0-84867897122
dc.identifier.urihttp://hdl.handle.net/11449/73709
dc.language.isoeng
dc.relation.ispartofBotanical Journal of the Linnean Society
dc.relation.ispartofjcr3.124
dc.relation.ispartofsjr1,352
dc.relation.ispartofsjr1,352
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectAnther wall
dc.subjectCarpel
dc.subjectCaryopsis
dc.subjectEcdeiocoleaceae
dc.subjectFlagellaria
dc.subjectFloral evolution
dc.subjectJoinvillea
dc.subjectTapetum
dc.subjectVasculature
dc.subjectanatomy
dc.subjectcladistics
dc.subjectclimbing plant
dc.subjectcomparative study
dc.subjectevolutionary biology
dc.subjectflower
dc.subjectmorphology
dc.subjectphylogeny
dc.subjectpollen
dc.subjectreproductive biology
dc.subjecttaxonomy
dc.subjectFlagellariaceae
dc.subjectJoinvilleaceae
dc.subjectPoaceae
dc.titleMorphological evolution in the graminid clade: Comparative floral anatomy of the grass relatives Flagellariaceae and Joinvilleaceaeen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
unesp.author.lattes2126319926799273
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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