ACID-MEDIATED AND ENZYME-MEDIATED SOLUBILIZATION OF CELL-WALL BETA-1.3,BETA-1.4-D-GLUCAN IN MAIZE COLEOPTILES - IMPLICATIONS FOR AUXIN-MEDIATED GROWTH

被引：16

作者：

HOHL, M ^{[1
]}

HONG, YN ^{[1
]}

SCHOPFER, P ^{[1
]}

机构：

[1] UNIV FREIBURG, INST BIOL, SCHANZLESTR 1, W-7800 FREIBURG, GERMANY

来源：

PLANT PHYSIOLOGY | 1991年 / 95卷 / 04期

关键词：

D O I：

10.1104/pp.95.4.1012

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The release of soluble carbohydrates from isolated cell wall of maize (Zea mays L.) was investigated in the range of pH 1 to 8.5. The pH profile demonstrated two peaks, a broad peak at pH 6 due to enzymatic breakdown of beta-glucan to monosaccharides (wall autolysis) and a sharp peak at pH 2.5 due to acid-mediated, nonenzymatic liberation of macromolecular beta-glucan from the wall. The pH dependence of acid-induced growth and cell-wall extensibility of coleoptile segments closely agrees with the pH dependence of acid-mediated beta-glucan solubilization in the isolated wall. However, there is no evidence that enzymatic or nonenzymatic beta-glucan solubilization is involved in the mechanism of auxin-mediated growth.

引用

页码：1012 / 1018

页数：7

共 27 条

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