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Abscisic acid insensitive 4 interacts with ICE1 and JAZ proteins to regulate ABA signaling-mediated cold tolerance in apple

文献类型： 外文期刊

作者： An, Jian-Ping 1 ; Xu, Rui-Rui 2 ; Liu, Xin 3 ; Su, Ling 4 ; Yang, Kuo 1 ; Wang, Xiao-Fei 1 ; Wang, Gui-Luan 1 ; You, Chun-Xiang 1 ;

作者机构： 1.Shandong Agr Univ, Coll Hort Sci & Engn, State Key Lab Crop Biol, Tai An 271018, Shandong, Peoples R China

2.Weifang Univ, Key Lab Biochem & Mol Biol Univ Shandong, Coll Biol & Agr Engn, Weifang 261061, Shandong, Peoples R China

3.Beijing Acad Forestry & Pomol Sci, Beijing 100093, Peoples R China

4.Shandong Acad Grape, Jinan 250100, Shandong, Peoples R China

关键词： ABI4; abscisic acid; apple; CBF; cold tolerance; ICE1; jasmonic acid; JAZ proteins; transcriptional regulation

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：7.298； 五年影响因子：8.291 ）

ISSN： 0022-0957

年卷期： 2022 年 73 卷 3 期

页码：

收录情况： SCI

摘要： The APETALA2/ethylene responsive factor family protein MdABI4 integrates jasmonic acid and abscisic acid signals to modulate cold tolerance through the JAZ-ABI4-ICE1-CBF regulatory cascade in apple. Abscisic acid is involved in the regulation of cold stress response, but its molecular mechanism remains to be elucidated. In this study, we demonstrated that the APETALA2/ethylene responsive factor (AP2/ERF) family protein MdABI4 positively regulates abscisic acid-mediated cold tolerance in apple. We found that MdABI4 interacts with MdICE1, a key regulatory protein involved in the cold stress response, and enhances the transcriptional regulatory function of MdICE1 on its downstream target gene MdCBF1, thus improving abscisic acid-mediated cold tolerance. The jasmonate-ZIM domain (JAZ) proteins MdJAZ1 and MdJAZ2 negatively modulate MdABI4-improved cold tolerance in apple by interacting with the MdABI4 protein. Further investigation showed that MdJAZ1 and MdJAZ2 interfere with the interaction between the MdABI4 and MdICE1 proteins. Together, our data revealed that MdABI4 integrates jasmonic acid and abscisic acid signals to precisely modulate cold tolerance in apple through the JAZ-ABI4-ICE1-CBF regulatory cascade. These findings provide insights into the crosstalk between jasmonic acid and abscisic acid signals in response to cold stress.

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