dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorCoan, A. I.
dc.creatorAlves, M. V.
dc.creatorScatena, V. L.
dc.date2014-05-20T15:31:54Z
dc.date2016-10-25T18:07:55Z
dc.date2014-05-20T15:31:54Z
dc.date2016-10-25T18:07:55Z
dc.date2008-05-01
dc.date.accessioned2017-04-06T00:24:44Z
dc.date.available2017-04-06T00:24:44Z
dc.identifierPlant Systematics and Evolution. Wien: Springer Wien, v. 272, n. 1-4, p. 181-195, 2008.
dc.identifier0378-2697
dc.identifierhttp://hdl.handle.net/11449/40926
dc.identifierhttp://acervodigital.unesp.br/handle/11449/40926
dc.identifier10.1007/s00606-007-0636-9
dc.identifierWOS:000255877500013
dc.identifierhttp://dx.doi.org/10.1007/s00606-007-0636-9
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/883660
dc.descriptionThe development of the ovule and of the fruit of Hypolytrum bullatum and H. schraderianum (Mapanioideae) and of Rhynchospora consanguinea and R. rugosa (Cyperoideae) are described. All species share anatropous, bitegmic and crassinucellate ovules, funicular obturator, megagametophyte of the Polygonum type, presence of starch grains in the mature megagametophyte, free-nuclear endosperm, Onagrad-type embryogeny, testal-tegmic seed, and a simple fruit of the achene type. Rhynchospora species have characters typical of the family: micropyle formed by the inner integument alone; 3-4-layered parietal tissue; and hard achene. Hypolytrum species differ in those characters by presenting a slightly zigzag micropyle formed by both integuments connected with the funicular obturator, 5-8-layered parietal tissue, and fibrous-spongy achene. The peculiar formation of the micropyle in Hypolytrum is a feature reported here for the first time in the family. The ontogeny provides evidence for a better understanding of the dispersal unit in Hypolytrum supporting the classification as a true achene, like that of Rhynchospora, which is characteristic of the family.
dc.languageeng
dc.publisherSpringer Wien
dc.relationPlant Systematics and Evolution
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectmicropyle
dc.subjectfunicular obturator
dc.subjectmegagametogenesis
dc.subjectachene
dc.subjectHypolytrum bullatum
dc.subjectHypolytrum schraderianum
dc.subjectRhynchospora consanguinea
dc.subjectRhynchospora rugosa
dc.titleComparative study of ovule and fruit development in species of Hypolytrum and Rhynchospora (Cyperaceae, Poales)
dc.typeOtro


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