Isolation and Characterization of a Pure Mannan from Oncidium (cv. Gower Ramsey) Current Pseudobulb during Initial Inflorescence Development

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  • Isolation and Characterization of a Pure Mannan from<i>Oncidium</i>(cv.<i>Gower Ramsey</i>) Current Pseudobulb during Initial Inflorescence Development

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A water-soluble and neutral polysaccharide was extracted from the current pseudobulbs of Oncidium “Gower Ramsey” during the early inflorescence stage (flower stalk less than 4 cm) by hot water, precipitated with ethanol, and purified with an anion exchanger. From the data of monosaccharide composition and linkage and anomeric configuration analyses, the polysaccharide was identified as a linear β-1→4 linked mannan.

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