Nitric oxide suppresses stomatal opening by inhibiting inward-rectifying Kin+ channels in Arabidopsis guard cells

被引：1

作者：

Xue ShaoWu ^{[1
,2
]}

Yang Pin ^{[1
]}

He YiKun ^{[2
]}

机构：

[1] Shanxi Univ, Inst Mol Sci, Minist Educ, Chem Biol & Mol Engn Lab, Taiyuan 030006, Peoples R China

[2] Capital Normal Univ, Coll Life Sci, Beijing 100037, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 2008年 / 53卷 / 14期

基金：

中国国家自然科学基金;

关键词：

inward-rectifying K-in(+) channels; nitric oxide; cytosolic Ca2+; stomata;

D O I：

10.1007/s11434-008-0314-5

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：

We explore nitric oxide (NO) effect on K-in(+) channels in Arabidopsis guard cells. We observed NO inhibited K-in(+) currents when Ca2+ chelator EGTA (Ethylene glycol-bis(2-aminoethylether)-N,N,N',N'-tetraacetic acid) was not added in the pipette solution; K-in(+) currents were not sensitive to NO when cytosolic Ca2+ was chelated by EGTA. NO inhibited the Arabidopsis stomatal opening, but when EGTA was added in the bath solution, inhibition effect of NO on stomatal opening vanished. Thus, it implies that NO elevates cytosolic Ca2+ by activating plasma membrane Ca2+ channels firstly, then inactivates K-in(+) channels, resulting in stomatal opening suppressed subsequently.

引用

页码：2156 / 2159

页数：4

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