Reduced Na+ and K+ permeability of K+ channel in plasma membrane isolated from roots of salt-tolerant mutant of wheat

被引：0

作者：

Guo, FQ ^{[1
]}

Tang, ZC ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Plant Physiol, Shanghai 200032, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 1999年 / 44卷 / 09期

关键词：

wheat; salt-tolerant mutant; plasma membrane; salt adaptation;

D O I：

10.1007/BF02885027

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The Na+ and K+ permeability of K+ channel in plasma membrane, isolated from roots of the salt-tolerant mutant of wheat, was lower than that of wild type in 100 mmol/L KCl and NaCl solution. The opening frequency of K+ channel of the mutant reduced more significantly than that of wild type in two kinds of solution mentioned above. It is assumed that the reduction of opening frequency mainly contributes to the Na+ and K+ permeability of K+ channel of the mutant. The electric conductance of single-channel of the mutant was similar to that of wild type and the main difference between them was exhibited as the opening frequency. Their K+/Ka(+) selectivity of K+ channel had no significant difference. The K+/Na+ selectivity of the mutant and wild type was 3.35 and 3.18 respectively.

引用

页码：816 / 821

页数：6

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