AHK5 histidine kinase regulates root elongation through an ETR1-dependent abscisic acid and ethylene signaling pathway in Arabidopsis thaliana
AHK5 histidine kinase regulates root elongation through an ETR1-dependent abscisic acid and ethylene signaling pathway in Arabidopsis thaliana
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DOI：
10.1093/pcp/pcl065
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发表时间：
2007-02-01
影响因子：
4.9
通讯作者：
Mizuno, Takeshi
中科院分区：
文献类型：
--
作者：
Iwama, Ayako;Yamashino, Takafumi;Mizuno, Takeshi
拟南芥基因组编码一个小家族的组氨酸（His）蛋白激酶，其中一些具有冗余功能的乙烯受体，而其他人作为细胞分裂素受体。其中最缺乏特征的是真正的组氨酸激酶5（AHK 5;也称为细胞分裂素非依赖性2，CKI 2）。在这里，我们描述了三个独立的ahk 5突变体，并表明他们有一个共同的表型。我们的研究结果表明，AHK 5 His激酶作为一个负调节信号通路中，乙烯和阿坝抑制根伸长通过ETR 1（乙烯受体）。
The Arabidopsis thaliana genome encodes a small family of histidine (His) protein kinases, some of which have redundant functions as ethylene receptors, whereas others serve as cytokinin receptors. The most poorly characterized of these is authentic histidine kinase 5 (AHK5; also known as cytokinin-independent 2, CKI2). Here we characterize three independent ahk5 mutants, and show that they have a common phenotype. Our results suggest that AHK5 His-kinase acts as a negative regulator in the signaling pathway in which ethylene and ABA inhibit the root elongation through ETR1 (an ethylene receptor).