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	Provedor de dados BABT (1) Braz. J. Plant Physiol. (1) Autor Dietrich,Sonia M. C. (2) Figueiredo-Ribeiro,Rita de Cássia L. (2) Braga,Márcia Regina (1) Carpita,Nicholas C. (1) Carvalho,M. Angela Machado de (1) Dias-Tagliacozzo,Gláucia M. (1) Itaya,Nair M. (1) Mais... Palavra-chave Asteraceae (1) Cell-wall polysaccharides (1) Cerrado (1) Drought (1) Environmental stresses (1) Fructan metabolism (1) Inulin (1) Lamiaceae (1) Reserve organs (1) Underground reserve organs (1) Xylopodium (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2006 (1) 2004 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Fructans and water suppression on intact and fragmented rhizophores of Vernonia herbacea BABT Dias-Tagliacozzo,Gláucia M.; Itaya,Nair M.; Carvalho,M. Angela Machado de; Figueiredo-Ribeiro,Rita de Cássia L.; Dietrich,Sonia M. C.. In order to evaluate the involvement of fructans in drought tolerance, experiments were conducted using intact plants and excised rhizophores of Vernonia herbacea. The water content in rhizophores of intact plants was maintained for 30 days when plants were watered every 7 and 15 days, whereas plants remained alive up to 60 days without water. Total fructan, oligo- to polysaccharides ratio and mean molecular mass of polysaccharides increased in these plants indicating depolymerization of median size molecules. In apical fragments of rhizophores kept dry the oligosaccharides increased in relation to polysaccharides one day after excision in treated tissues. This was reflected in the HPLC profile of the oligosaccharides in which the proportion of free... Tipo: Info:eu-repo/semantics/article Palavras-chave: Inulin; Environmental stresses; Drought; Fructan metabolism; Reserve organs; Asteraceae. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000300005 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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