Gnetales


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Related to Gnetales: gnetum, Ginkgoales
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Gnetales - chiefly tropical or xerophytic woody plants; practically unknown as fossils but considered close to the ancestral line of angiosperms
plant order - the order of plants
class Gnetopsida, Gnetophyta, Gnetophytina, Gnetopsida, subdivision Gnetophytina - gymnospermous flowering plants; supposed link between conifers and angiosperms; in some systems classified as a class (Gnetopsida) and in others as a subdivision (Gnetophytina or Gnetophyta)
family Gnetaceae, Gnetaceae - plants having small unisexual flowers and fleshy or winged fruit: in some classifications includes the genera Ephedra and Welwitschia as well as genus Gnetum
Ephedraceae, family Ephedraceae - ephedras: in some classifications included in the Gnetaceae
family Welwitschiaceae, Welwitschiaceae - in some classifications included in the Gnetaceae
References in periodicals archive ?
and this in turn has been linked with changes in the distribution of parenchyma cells." Now that we know that Gnetales are conifer derivatives (Bowe et al., 2000; Burleigh & Mathews, 2004), and that Gnetales have attained, parallel to angiosperms, essentially all of the important anatomical features of angiosperm wood (Carlquist, 2012b), we have a source for demonstrating quite dramatically pathways of wood evolution in vessel-bearing angiosperms and their significance.
Ephedra (Ephedra intermedia) belongs to family Ephedraceae and is a genus of nonflowering plants, related to Gnetales, very near relatives of angiosperms [3].
(2012), en los que se ha reportado mayor variedad de helechos, coniferas, gnetales y algunas angiospermas.
Careful comparison of these taxa with extinct and extant plant groups revealed the prevalence of following viz; Gymnosperm, Peltasperms, Gnetales, Medullosales and Ephedralels.
The anatomical organization of leaves and woody tissues of Gnetum is very similar to those of dicotyledoneous plants (Fisher & Ewers, 1995) to the extent that Gnetales is considered a phylogenetic link between Gymnosperms and Angiosperms (Shutov, Braun, Chesnokov, Horstmann, Kakhovskaya & Baumlein, 1998).
En las epocas post-Cenomanianas, hay una gran reduccion de los Gnetales en el neotropico, aunque es incierto que tan grande o abrupta fue esta reduccion, ya que existen muy pocos estudios al respecto.
Otros trabajos que han aportado conocimiento sobre el grupo son el de Martens (1971) acerca de la anatomia, citologia y embriologia de las Gnetales y el de Pant y Verma (1974), donde se hace un analisis de las caracteristicas de la epidermis y la cuticula en varias especies.
Development of gelatinous (reaction) fibers in stems of Gnetum gnemon (Gnetales).
Following (Chase et al., 1993; Doyle et al., 1994; Soltis et al., 1997; Soltis et al., 2000; Zanis et al., 2003) a set of gymnosperms (specifically Gnetum and Ephedra (Gnetales)) was designated as outgroup.
Extant seed plants comprise five clades [ILLUSTRATION FOR FIGURE 1 OMITTED]: cycads, Ginkgo, conifers, angiosperms, and Gnetales (Ephedra, Welwitschia, Gnetum).
(2010) there is considerable diversity in male gametophytes amongst the four orders of gymnosperms (Cycadales, Ginkgoales, Coniferales and Gnetales).