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Mitogen-activated protein kinase TaMPK3 suppresses ABA response by destabilising TaPYL4 receptor in wheat

文献类型： 外文期刊

作者： Liu, Ying 1 ; Yu, Tai-Fei 1 ; Li, Yi-Tong 1 ; Zheng, Lei 1 ; Lu, Zhi-Wei 1 ; Zhou, Yong-Bin 1 ; Chen, Jun 1 ; Chen, Ming 1 ; Zhang, Jin-Peng 1 ; Sun, Guo-Zhong 1 ; Cao, Xin-You 2 ; Liu, Yong-Wei 3 ; Ma, You-Zhi 1 ; Xu, Zhao-Shi 1 ;

作者机构： 1.Chinese Acad Agr Sci CAAS, Natl Key Facil Crop Gene Resources & Genet Improv, Key Lab Biol & Genet Improvement Triticeae Crops, Inst Crop Sci,Minist Agr, Beijing 100081, Peoples R China

2.Shandong Acad Agr Sci, Crop Res Inst, Natl Engn Lab Wheat & Maize, Key Lab Wheat Biol & Genet Improvement, Jinan 250100, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Inst Biotechnol & Food Sci, Plant Genet Engn Ctr Hebei Prov, Shijiazhuang 050051, Hebei, Peoples R China

4.Chinese Acad Agr Sci, Natl Nanfan Res Inst Sanya, Hainan Yazhou Bay Seed Lab, Sanya 572024, Peoples R China

关键词： ABA; drought tolerance; negative regulation; TaMPK3; TaPYL4; Triticum aestivum

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.323； 五年影响因子：10.768 ）

ISSN： 0028-646X

年卷期：

页码：

收录情况： SCI

摘要： Abscisic acid (ABA) receptors are considered as the targeted manipulation of ABA sensitivity and water productivity in plants. Regulation of their stability or activity will directly affect ABA signalling. Mitogen-activated protein kinase (MAPK) cascades link multiple environmental and plant developmental cues. However, the molecular mechanism of ABA signalling and MAPK cascade interaction remains largely elusive. TaMPK3 overexpression decreases drought tolerance and wheat sensitivity to ABA, significantly weakening ABA's inhibitory effects on growth. Under drought stress, overexpression lines show lower survival rates, shoot fresh weight and proline content, but higher malondialdehyde levels at seedling stage, as well as decreased grain width and 1000 grain weight in both glasshouse and field conditions at the adult stage. TaMPK3-RNAi increases drought tolerance. TaMPK3 interaction with TaPYL4 leads to decreased TaPYL4 levels by promoting its ubiquitin-mediated degradation, whereas ABA treatment diminishes TaMPK3-TaPYL interactions. In addition, the expression of ABA signalling proteins is impaired in TaMPK3-overexpressing wheat plants under ABA treatment. The MPK3-PYL interaction module was found to be conserved across monocots and dicots. Our results suggest that the MPK3-PYL module could serve as a negative regulatory mechanism for balancing appropriate drought stress response with normal plant growth signalling in wheat.

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[1]Mitogen-activated protein kinase TaMPK3 suppresses ABA response by destabilising TaPYL4 receptor in wheat. Liu, Ying,Yu, Tai-Fei,Li, Yi-Tong,Zheng, Lei,Lu, Zhi-Wei,Zhou, Yong-Bin,Chen, Jun,Chen, Ming,Zhang, Jin-Peng,Sun, Guo-Zhong,Ma, You-Zhi,Xu, Zhao-Shi,Cao, Xin-You,Liu, Yong-Wei,Xu, Zhao-Shi.

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