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Seed morphology and post-seminal development of Tillandsia L. (Bromeliaceae) from the "Campos Gerais", Paraná, Southern Brazil BABT
Scatena,Vera Lucia; Segecin,Simone; Coan,Alessandra Ike.
This work studied the morphology and post-seminal development of seeds of Tillandsia gardneri Lindl., T. streptocarpa Baker, and T. stricta Sol. ex Sims (Bromeliaceae) from the "Campos Gerais", State of Paraná, Southern Brazil. The seeds (ca. 2.0 mm long) presented plumose appendages at their micropylar end, an important structure in the taxonomy of the family since it represented an elaborate apparatus allowing effective wind-dispersal. Seeds germinated after circa twenty days. The haustorial cotyledon, responsible for the seedling nutrition, appeared first during the germination process. No cataphyll or primary roots developed. A small tank came along in the seedling, formed by the base of the sheath of the first leaf, which overlapped that of the second...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tillandsia; Seed morphology; Post-seminal development.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000700012
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Taxonomic relevance of seed and seedling morphology in two Amazonian species of Entada (Leguminosae) Acta Amazonica
Rodrigues,Rodrigo Schütz; Feitoza,Gildo Vieira; Flores,Andréia Silva.
We carried out a comparative morphological study to evaluate the taxonomic value of seed and seedling traits of Entada polystachya and E. simplicata (Leguminosae, Mimosoideae, Mimoseae). Seeds of both species were collected from wild populations in Roraima State, Brazil. Our results show consistent quantitative and qualitative differences between these species regarding their seeds and seedlings. Testa fracture lines, funiculus impression, lens characters, radicle shape and length, and cotyledon lobes length, seedling morphology group, number of pinnae at first node, and hypocotyl length permit a straightforward distinction of E. polystachya from E. simplicata, supporting a recent treatment of the latter taxon as a distinct species, endemic to Roraima...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fabaceae; Mimosoideae; Embryo; Post-seminal development; Testa.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000100003
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