脱落酸信号传导参与调控丝裂原活化蛋白激酶级联模块AIK1-MKK5-MPK6。
Abscisic acid signaling is involved in regulating the mitogen-activated protein kinase cascade module, AIK1-MKK5-MPK6.
作者信息
Li Kun, Yang Fengbo, Miao Yuchen, Song Chun-Peng
机构信息
a Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology , Henan University , Kaifeng , P.R. China.
出版信息
Plant Signal Behav. 2017 May 4;12(5):e1321188. doi: 10.1080/15592324.2017.1321188. Epub 2017 May 11.
Abstract
Abscisic acid (ABA) plays roles in plant growth and development and in stress responses. Recently, we found that ABA regulates ABA-insensitive protein kinase 1 (AIK1), a mitogen-activated protein kinase kinase kinase. Compared with wild-type, aik1-1 showed downregulation of ABA-responsive genes (RD29A, MYC2, ABI3 and ABI4). Under ABA treatment, the transcript level of KRP1 (Kip-related protein, a cyclin-dependent kinase inhibitor) was lower in aik1-1 than in wild-type. The activity of ABA-activated MPK6 was decreased in abi1 abi2, and abi1 abi2 hab1, and increased in snrk2.2 snrk2.3 and pyr1 pyl1 pyl2 pyl4 mutants. These results indicated that AIK1-MKK5-MPK6 functions in ABA responses and requires ABA-responsive gene expression to regulate ABA-inhibited root growth and cell division. The ABA signaling pathway regulates this MAPK cascade.
摘要
脱落酸（ABA）在植物生长发育和应激反应中发挥作用。最近，我们发现ABA可调节脱落酸不敏感蛋白激酶1（AIK1），一种丝裂原活化蛋白激酶激酶激酶。与野生型相比，aik1-1中脱落酸应答基因（RD29A、MYC2、ABI3和ABI4）表达下调。在ABA处理下，KRP1（一种细胞周期蛋白依赖性激酶抑制剂，Kip相关蛋白）在aik1-1中的转录水平低于野生型。ABA激活的MPK6活性在abi1 abi2和abi1 abi2 hab1中降低，而在snrk2.2 snrk2.3和pyr1 pyl1 pyl2 pyl4突变体中升高。这些结果表明，AIK1-MKK5-MPK6在ABA应答中发挥作用，并且需要脱落酸应答基因表达来调节ABA抑制的根系生长和细胞分裂。ABA信号通路调节这一促分裂原活化蛋白激酶级联反应。
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