Loss of nitrate reductases NIA1 and NIA2 impairs stomatal closure by altering genes of core ABA signaling components in Arabidopsis.
Loss of nitrate reductases NIA1 and NIA2 impairs stomatal closure by altering genes of core ABA signaling components in Arabidopsis.
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DOI：
10.1080/15592324.2016.1183088
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发表时间：
2016-06-02
影响因子：
2.9
通讯作者：
Chen ZH
中科院分区：
文献类型：
--
作者：
Zhao C;Cai S;Wang Y;Chen ZH
硝酸还原酶NIA1和NIA2决定植物NO的产生，对脱落酸（ABA）诱导的气孔关闭至关重要。然而，NIA1和NIA2在硝酸还原酶功能丧失突变体nia1nia2中ABA信号传导中的作用尚未得到重视。最近，我们已经证明在nia1nia2中不存在aba抑制的K+电流和aba增强的慢阴离子电流。外源NO恢复了nia1nia2气孔关闭通道的调节。在本研究中，我们发现NIA1和NIA2的突变几乎破坏了拟南芥保护细胞ABA信号通路的所有关键成分。我们还提出了nia1nia2突变体ABA信号传导的简化模型。
Nitrate reductases NIA1 and NIA2 determine NO production in plants and are critical to abscisic acid (ABA)-induced stomatal closure. However, the role for NIA1 and NIA2 in ABA signaling has not been paid much attention in nitrate reductase loss-of-function mutant nia1nia2. Recently, we have demonstrated that ABA-inhibited K+in current and ABA-enhanced slow anion current were absent in nia1nia2. Exogenous NO restored regulation of these channels for stomatal closure in nia1nia2. In this study, we found that mutating NIA1 and NIA2 impaired nearly all the key components of guard cell ABA signaling pathway in Arabidopsis. We also propose a simplified model for ABA signaling in the nia1nia2 mutant.