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	Provedor de dados Biota Neotropica (1) Rev. Bras. Bot. (1) Autor Aidar,M.P.M. (1) BUCKERIDGE,MARCOS S. (1) Buckeridge,M.S. (1) Costa,A.C. (1) Costa,P.M.F. (1) Dietrich,S.M.C. (1) Martinez,C.A. (1) POTOMATI,ADRIANA (1) Mais... Palavra-chave Storage mobilisation (2) Abscisic acid (1) Biodiversity (1) CO2 enrichment (1) Cotyledons (1) Galactomannan (1) Hymenaea courbaril (1) Leguminosae (1) Open top chamber (1) Photosynthesis (1) Root:shoot ratio (1) Seed (1) Seedling growth (1) Xyloglucan (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2002 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Effect of atmospheric CO2 enrichment on the establishment of seedlings of Jatobá, Hymenaea Courbaril L. (Leguminosae, Caesalpinioideae) Biota Neotropica Aidar,M.P.M.; Martinez,C.A.; Costa,A.C.; Costa,P.M.F.; Dietrich,S.M.C.; Buckeridge,M.S.. Plants grown in elevated CO2 environments may exhibit photosynthetic acclimation or down regulation, which is characterised by reduced rates of photosynthesis. In most cases of CO2-induced photosynthetic acclimation, the reduced rates of photosynthesis were still higher than those detected in plants growing at ambient CO2 concentrations. In this work we present a study on the behaviour of seedlings of Hymenaea courbaril, a late secondary/climax species that is one of the most important trees in mature tropical forests of the Americas. After germination, the seedling of H. courbaril increases its rate of growth due to the mobilisation of massive amounts of a storage cell wall polysaccharide (xyloglucan) from its cotyledons. In our experiments, germinated... Tipo: Info:eu-repo/semantics/article Palavras-chave: Photosynthesis; CO2 enrichment; Hymenaea courbaril; Storage mobilisation; Root:shoot ratio; Seedling growth; Cotyledons; Open top chamber; Xyloglucan; Biodiversity. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032002000100008 Effect of abscisic acid on the mobilisation of galactomannan and embryo development of Sesbania virgata (Cav.) Pers. (Leguminosae - Faboideae) Rev. Bras. Bot. POTOMATI,ADRIANA; BUCKERIDGE,MARCOS S.. Galactomannans (GM) are storage cell wall polysaccharides present in endospermic seeds of legumes. They are thought to be storage polymers, since it has been observed for a few species (among them Sesbania virgata) that they are completely broken down after germination and their products are transferred to the growing embryo. We examined the effect of 10-4 M abscisic acid (ABA) on the degradation of galactomannan in isolated endosperms and intact seeds of S. virgata. We found that after seed germination the initial embryo growth was retarded. Ultrastructural analysis showed that the embryo is completely surrounded by an endosperm which displays very thick galactomannan-containing cell walls. Although an inhibitory effect has been observed on the increase... Tipo: Info:eu-repo/semantics/article Palavras-chave: Abscisic acid; Galactomannan; Seed; Leguminosae; Storage mobilisation. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000300006 Registros recuperados: 2 Primeira ... 1 ... Última

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