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Título: | Anther and pollen development in some species of Poaceae (Poales) |
Título(s) alternativo(s): | Desenvolvimento da antera e do grão de pólen em espécies de Poaceae (Poales) |
Palavras-chave: | Bambusoideae Chloridoideae Gramineae Microsporogenesis Panicoideae Microsporogênese |
Data do documento: | 2010 |
Editor: | Instituto Internacional de Ecologia |
Citação: | NAKAMURA, A.T.; LONGHI-WAGNER, H.M.; SCATENA, V.L. Anther and pollen development in some species of Poaceae (Poales). Brazilian Journal of Biology, São Carlos, v. 70, n. 2, p.351-360, 2010. |
Resumo: | Anther and pollen development were studied in Olyra humilis Nees, Sucrea monophylla Soderstr, (Bambusoideae), Axonopus aureus P. Beauv., Paspalum polyphyllum Nees ex Trin. (Panicoideae), Eragrostis solida Nees, and Chloris elata Desv. (Chloridoideae). The objective of this study was to characterise, embryologically, these species of subfamilies which are considered basal, intermediate and derivate, respectively. The species are similar to each other and to other Poaceae. They present the following characters: tetrasporangiate anthers; monocotyledonous-type anther wall development, endothecium showing annular thickenings, secretory tapetum; successive microsporogenesis; isobilateral tetrads; spheroidal, tricellular, monoporate pollen grains with annulus and operculum. Nevertheless, the exine patterns of the species studied are distinct. Olyra humilis and Sucrea monophylla (Bambusoideae) show a granulose pattern, whereas in the other species, it is insular. In addition, Axonopus aureus and Paspalum polyphyllum (Panicoideae) have a compactly insular spinule pattern, while Chloris elata and Eragrostis solida (Chloridoideae) show a sparsely insular spinule pattern. The exine ornamentation may be considered an important feature at the infrafamiliar level. |
URI: | http://repositorio.ufla.br/jspui/handle/1/1415 |
Aparece nas coleções: | DBI - Artigos publicados em periódicos |
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ARTIGO_Anther and pollen development in some species of Poaceae.pdf | 1,48 MB | Adobe PDF | Visualizar/Abrir |
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