Identification and characterization of inward K+-channels in plasma membranes of Arabidopsis root cortex cells

被引：3

作者：

Yu, CJ ^{[1
]}

Wu, WH ^{[1
]}

机构：

[1] China Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R China

来源：

SCIENCE IN CHINA SERIES C-LIFE SCIENCES | 1999年 / 42卷 / 03期

关键词：

Arabidopsis; root cells; K plus -channels; K+/Na+ selectivity;

D O I：

10.1007/BF03183608

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Patch clamping whole-cell recording techniques were applied to study the inward K+-channels in Arabidopsis root cortex cells. The inward K+-channels in the plasma membranes of the root cortex cell protoplasts were activated by hyperpolarized membrane potentials. The channels were highly selective for K+ ions over Na+ ions. The channel activity was significantly inhibited by the external TEA(+) or Ba2+. The changes in cytoplasmic Ca2+ concentrations did not affect the whole-cell inward K+-currents. The possible association between the channel selectivity to K+ and Na+ ions and plant salt-tolerance was also discussed.

引用

页码：307 / 315

页数：9

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