STIMULATION OF MEMBRANE-ASSOCIATED POLYSACCHARIDE SYNTHETASES BY A MEMBRANE-POTENTIAL IN DEVELOPING COTTON FIBERS

被引：40

作者：

BACIC, A ^{[1
]}

DELMER, DP ^{[1
]}

机构：

[1] MICHIGAN STATE UNIV, PLANT RES LAB, US DOE, E LANSING, MI 48824 USA

来源：

PLANTA | 1981年 / 152卷 / 04期

关键词：

D O I：

10.1007/BF00388260

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Conditions which induce a transmembrane electrical potential, positive with respect to the inside of membrane vesicles, result in a substantial (4- to 12-fold) stimulation of the activity of membrane-associated .beta.-glucan synthetases in a membrane preparation derived from the developing cotton (G. hirsutum L.) fiber. Induction of electrical potentials which are negative with respect to the inside of the membrane vesicle results in little or no stimulation of .beta.-glucan synthesis. Those products whose synthesis is stimulated are mainly .beta.-1,3-glucan, but there is a considerable increase in .beta.-1,4-glucan. No .alpha.-1,4-glucan (starch) was detected in the reaction products. A transmembrane pH gradient had no effect on .beta.-glucan synthesis. A transmembrane electrical potential can influence the activity of membrane-associated polysaccharide synthetases.

引用

页码：346 / 351

页数：6

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