期刊
JOURNAL OF GENETICS AND GENOMICS
卷 49, 期 8, 页码 766-775出版社
SCIENCE PRESS
DOI: 10.1016/j.jgg.2022.06.009
关键词
Oryza sativa; MPK; OsMPK4; IPA1; Salt tolerance
资金
- National Natural Science Foundation of China [31788103, 32122064, 32122012]
- Chinese Academy of Sciences [XDA24030504, 2019099]
- China Agricultural Research System [CARS-01-4]
- China Postdoctoral Science Foundation [2019M650885]
Salt stress has detrimental effects on plant growth and development in rice. The OsMPK4-IPA1 signaling pathway plays a regulatory role in salt tolerance, providing insights for breeding salt-tolerant rice varieties.
Salt stress adversely affects plant growth, development, and crop yield. Rice (Oryza sativa L.) is one of the most salt-sensitive cereal crops, especially at the early seedling stage. Mitogen-activated protein kinase (MAPK/MPK) cascades have been shown to play critical roles in salt response in Arabidopsis. However, the roles of the MPK cascade signaling in rice salt response and substrates of OsMPK remain largely unknown. Here, we report that the salt-induced OsMPK4-Ideal Plant Architecture 1 (IPA1) signaling pathway regulates the salt tolerance in rice. Under salt stress, OsMPK4 could interact with IPA1 and phosphorylate IPA1 at Thr180, leading to degradation of IPA1. Genetic evidence shows that IPA1 is a negative regulator of salt tolerance in rice, whereas OsMPK4 promotes salt response in an IPA1-dependent manner. Taken together, our results uncover an OsMPK4-IPA1 signal cascade that modulates the salt stress response in rice and sheds new light on the breeding of salt-tolerant rice varieties. Copyright (C) 2022, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China. Published by Elsevier Limited and Science Press. All rights reserved.
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