サトイモ(Colocasia esculenta(L)Schott)の熱水可溶性多糖の部分構造--親芋について

概要

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A structural investigation was performed on the hot water-soluble polysaccharide of the mother corm. The proportion of glucose increased drastically during tuberization and development. The hot water-soluble polysaccharide was fractionated by Sephadex G-100 column (2.6×90cm) followed by DEAE-Sephadex A-50 column chromatography. Seven kinds of polysaccharides were obtained. Three polysaccharides obtained in the non-adsorbed fraction on ion-exchange column chromatography were subjected to structural investigation. They were composed mostly of glucose, and a small proportion of galactose, rhamnose, arabinose, mannose and galacturonic acid. Methylation analysis, Smith degradation study and enzymic degradation studies using dextranase (Penicilliurn) suggested that these polysaccharides contained α-1→6 linked glucose residues.