A major gene for chilling tolerance variation in Indica rice codes for a kinase OsCTK1 that phosphorylates multiple substrates under cold
文献类型： 外文期刊
作者： Wu, Jiawen 1 ; Liu, Huimin 1 ; Zhang, Yan 1 ; Zhang, Yingdong 1 ; Li, Dongling 1 ; Liu, Shiyan 1 ; Lu, Shan 1 ; Wei, Lihui 4 ; Hua, Jian 5 ; Zou, Baohong 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Agr, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Cyrus Tang Innovat Ctr Crop Seed Ind,Jiangsu Prov, Nanjing 210095, Peoples R China
2.Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China
3.China Natl Rice Res Inst, 359 Tiyuchang Rd, Hangzhou 310006, Peoples R China
4.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China
5.Cornell Univ, Sch Integrat Plant Sci, Plant Biol Sect, Ithaca, NY 14853 USA
关键词： chilling tolerance; GWAS; haplotype; natural variation; OsCTK1; phosphorylation
期刊名称：NEW PHYTOLOGIST （ 影响因子：9.4； 五年影响因子：10.5 ）
ISSN： 0028-646X
年卷期： 2024 年 242 卷 5 期
页码：
收录情况： SCI
摘要： Rice is susceptible to chilling stress. Identifying chilling tolerance genes and their mechanisms are key to improve rice performance. Here, we performed a genome-wide association study to identify regulatory genes for chilling tolerance in rice. One major gene for chilling tolerance variation in Indica rice was identified as a casein kinase gene OsCTK1. Its function and natural variation are investigated at the physiological and molecular level by its mutants and transgenic plants. Potential substrates of OsCTK1 were identified by phosphoproteomic analysis, protein-protein interaction assay, in vitro kinase assay, and mutant characterization. OsCTK1 positively regulates rice chilling tolerance. Three of its putative substrates, acidic ribosomal protein OsP3B, cyclic nucleotide-gated ion channel OsCNGC9, and dual-specific mitogen-activated protein kinase phosphatase OsMKP1, are each involved in chilling tolerance. In addition, a natural OsCTK1 chilling-tolerant (CT) variant exhibited a higher kinase activity and conferred greater chilling tolerance compared with a chilling-sensitive (CS) variant. The CT variant is more prevalent in CT accessions and is distributed more frequently in higher latitude compared with the CS variant. This study thus enables a better understanding of chilling tolerance mechanisms and provides gene variants for genetic improvement of chilling tolerance in rice.
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