CATION-ACTIVATED ATPASE ACTIVITY OF PLASMALEMMA-ENRICHED MEMBRANE PREPARATIONS FROM MAIZE COLEOPTILES

被引：30

作者：

BEFFAGNA, N ^{[1
]}

MARRE, E ^{[1
]}

COCUCCI, SM ^{[1
]}

机构：

[1] UNIV MILAN,IST CHIM AGRARIA,CATTEDRA FISIOL VEGETALE,I-20133 MILAN,ITALY

来源：

PLANTA | 1979年 / 146卷 / 04期

关键词：

ATPase; (activators; inhibitors); Plasmalemma (ATPase); Zea;

D O I：

10.1007/BF00380849

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The ATPase activity present in plasmalemma-enriched preparations from maize coleoptiles shows an optimum at pH 6, a strong dependence on Mg2+, and is stimulated by K+ and other monovalent cations, both organic and inorganic. The activation of ATPase by K+ obeys Michaelis Menten kinetics, saturation being reached at 50 mM K+ concentration. K+, Mg2+-stimulated ATPase activity is strongly inhibited by N,N′-dicyclohexylcarbodiimide and by diethylstilbestrol and, to a lesser extent, by octylguanidine. © 1979 Springer-Verlag.

引用

页码：387 / 391

页数：5

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