Abstract
Cell walls isolated from Lolium multiflorum endosperm grown in liquid suspension culture contain 90% carbohydrate (as anhydro-glucose), 0·3 nitrogen, 1·9% lipid and 4·3% ash. The relative proportions of neutral sugars present in hydrolysates of the wall polysaccharides are glucose, 50%; arabinose, 19%; xylose, 26% and galactose, 5%. Extraction of the wall with 7 M urea solubilizes a polysaccharide representing 19% of the wall and composed of glucose and minor amounts of pentoses. This fraction has been examined by acid and enzymic hydrolysis and by periodate oxidation, and was shown to be a β-1,3; 1,4-glucan with approx. 79% 1,4-linkages. A specific β-glucan hydrolase has been used to determine the content of this mixed-linked glucan in isolated endosperm cell walls.
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