OsMPK4 promotes phosphorylation and degradation of IPA1 in response to salt stress to confer salt tolerance in rice |
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| Affiliation: | 1. State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China;1. State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China;2. CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China;3. College of Horticulture, China Agricultural University, Beijing 100193, China;4. College of Life Sciences, Jiangsu Key Laboratory for Microbes and Functional Genomics, Nanjing Normal University, Nanjing, Jiangsu 210023, China;5. Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea;6. School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea;7. Plant Protection Department and Major Crop Disease Laboratory, College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, China;8. Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan 572025, China;1. State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China;2. Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China;3. Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, South China Agricultural University, Guangzhou 510642, China;1. National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China;2. State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, The Innovative Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China;3. National Nanfan Research Institute, Chinese Academy of Agricultural Sciences, Sanya 572024, China;1. Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agriculture University, Taian, Shandong 271018, China;4. State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China;5. Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany;1. National Key Laboratory of Crop Genetics and Germplasm Enhancement/Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture/College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China;2. Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Hunan Agricultural University, Changsha 410128, Hunan, China |
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| Abstract: | 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. |
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| Keywords: | MPK Salt tolerance |
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