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	Provedor de dados Braz. J. Plant Physiol. (1) Rev. Bras. Bot. (1) Autor BRAGA,MARCIA R. (1) Braga,Márcia Regina (1) Carpita,Nicholas C. (1) Dietrich,Sonia M. C. (1) Figueiredo-Ribeiro,Rita de Cássia L. (1) HAHN,MICHAEL G. (1) MORAES,FABIO (1) Mais... Palavra-chave Cell-wall polysaccharides (2) Amazonian tree (1) Bathysa meridionalis (1) Cerrado (1) Cinchonoideae (1) Dialypetalanthaceae (1) Lamiaceae (1) Rubiaceae (1) Underground reserve organs (1) Xylopodium (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2006 (1) 2001 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Comparative analysis of leaf cell-wall polysaccharides of Dialypetalanthus fuscescens and Bathysa meridionalis: evidence of biochemical similarities between Dialypetalanthaceae and Rubiaceae-Cinchonoideae Rev. Bras. Bot. MORAES,FABIO; HAHN,MICHAEL G.; BRAGA,MARCIA R.. Dialypetalanthus fuscescens is an Amazonian endemic species with problematic taxonomic position. This neotropical rainforest tree belongs to the monospecific Dialypetalanthaceae. In the present work, we analysed the leaf cell-wall polysaccharide composition of Dialypetalanthus fuscescens and compared it to that of Bathysa meridionalis (Rubiaceae-Cinchonoideae). Glycosyl composition and glycosyl-linkage analysis indicated that both species have similar cell wall composition. Arabinogalactans were the major component of the pectic polysaccharides and xylans, although being reported in minor amounts in dicots, were found to be the predominant hemicellulosic polysaccharide in cell walls of both species. These findings are in agreement with previous data on... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dialypetalanthaceae; Amazonian tree; Bathysa meridionalis; Rubiaceae; Cinchonoideae; Cell-wall polysaccharides. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000300007 Changes in pectins of the Xylopodium of Ocimum nudicaule from dormancy to sprouting Braz. J. Plant Physiol. Braga,Márcia Regina; Carpita,Nicholas C.; Dietrich,Sonia M. C.; Figueiredo-Ribeiro,Rita de Cássia L.. The thickened underground organ of Ocimum nudicaule is a tuber-like structure (xylopodium) that is dormant in winter and sprouts at the beginning of the spring. Changes in content of cell wall polysaccharides were shown to occur from dormancy to sprouting. Pectic polysaccharides of O. nudicaule were analyzed in relation to composition, molecular mass, and linkage structure in these two phenological phases. The pectin content was 33 % lower during sprouting when compared to dormancy. Changes were also observed in the molecular mass of the pectin fraction from dormancy to sprouting. Galacturonic acid was the predominant sugar, suggesting the presence of a homogalacturonan as the main pectic polysaccharide. A decrease in the acidic polysaccharides,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cell-wall polysaccharides; Cerrado; Lamiaceae; Underground reserve organs; Xylopodium. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200009 Registros recuperados: 2 Primeira ... 1 ... Última

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