Sugar composition of oat-coleoptile cell walls

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Abstract
The yields of monosaccharides obtained by the hydrolysis of extracts of oat-coleoptile cell-wall material are reported. The material had a high content of hot-water-insoluble arabinose, probably mainly derived from arabinoglucuronoxylans. Changes in amounts of monosaccharides that occur during elongation of isolated oat-coleoptile cylinders were determined. When sugar was supplied in the medium, a general increase in cell-wall monosaccharides occurred. When elongation occurred without sugar, a decrease in non-cellulosic glucose and galactose and an approximately compensating increase in a-cellulose glucose was observed.