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

Abstract

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 beta-1-->4 linked mannan.