STRUCTURE OF HEMICELLULOSIC POLYSACCHARIDES OF AVENA-SATIVA COLEOPTILE CELL-WALLS

被引:68
作者
LABAVITCH, JM [1 ]
RAY, PM [1 ]
机构
[1] STANFORD UNIV,DEPT BIOL SCI,STANFORD,CA 94305
基金
美国国家科学基金会;
关键词
arabinoxylan; Avena coleoptile; cell wall; glucuronoarabinoxylan; Gramineae; hemicellulose; mixed-linked glucan; polysaccharides;
D O I
10.1016/S0031-9422(00)88649-5
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The glycosidic linkage compositions of intact and, in some cases, enzyme-degraded polysaccharides extracted from the cell walls of oat coleoptiles and subsequently purified have been examined. A major component is shown to be a glucuronoarabinoxylan similar in structure to those described for a variety of other monocots. The noncellulosic glucan component is a β-linked polymer containing both 1,4- and 1,3-linked glucosyl residues in a ratio of 2 to 1. Analysis of the oligosaccharide produced by 'lichenase' digestion of this β-glucan suggests that the the 1,3- and 1,4-glucosyl linkages repeat in regular fashion. A small amount of xyloglucan polysaccharides like those described for cell walls of dicots was also detected. © 1978.
引用
收藏
页码:933 / 937
页数:5
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