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Comprehensive analysis of stress-activated protein kinase genes (OsSAPKs) in rice flowering time

文献类型： 外文期刊

作者： Liu, Yingxiang 1 ; Zhou, Wenyan 2 ; He, Mingliang 1 ; Sui, Jingjing 2 ; Tian, Xiaojie 1 ; Guan, Qingjie 2 ; Yu, Xinglong 3 ; Li, Kun 4 ; Bu, Qingyun 1 ; Li, Xiufeng 1 ;

作者机构： 1.Chinese Acad Sci, State Key Lab Black Soils Conservat & Utilizat, Key Lab Soybean Mol Design Breeding, NortheastInst Geog & Agroecol, Harbin 150081, Peoples R China

2.Northeast Forestry Univ, Coll Life Sci, Harbin 150040, Peoples R China

3.Beidahuang Grp Erdaohe Farm CO LTD, Fuyuan 156502, Peoples R China

4.Heilongjiang Acad Agr Sci, Biotechnol Inst, Harbin 150080, Peoples R China

5.Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China

关键词： CRISPR/Cas9; Heading date; OsSAPKs; Rice

期刊名称：PLANTA （ 影响因子：4.3； 五年影响因子：4.8 ）

ISSN： 0032-0935

年卷期： 2024 年 259 卷 6 期

页码：

收录情况： SCI

摘要： Main conclusion The rice SnRK2 members SAPK4, SAPK5, SAPK7 and SAPK10 are positive regulators involved in the regulation of rice flowering, while other single mutants exhibited no effect on rice flowering. The rice SnRK2 family, comprising 10 members known as SAPK (SnRK2-Associated Protein Kinase), is pivotal in the abscisic acid (ABA) pathway and crucial for various biological processes, such as drought resistance and salt tolerance. Additionally, these members have been implicated in the regulation of rice heading date, a key trait influencing planting area and yield. In this study, we utilized gene editing technology to create mutants in the Songjing 2 (SJ2) background, enabling a comprehensive analyze the role of each SAPK member in rice flowering. We found that SAPK1, SAPK2, and SAPK3 may not directly participate in the regulatory network of rice heading date, while SAPK4, SAPK5, and SAPK7 play positive roles in rice flowering regulation. Notably, polygene deletion resulted in an additive effect on delaying flowering. Our findings corroborate the previous studies indicating the positive regulatory role of SAPK10 in rice flowering, as evidenced by delayed flowering observed in sapk9/10 double mutants. Moving forward, our future research will focus on analyzing the molecular mechanisms underlying SAPKs involvement in rice flowering regulation, aiming to enhance our understanding of the rice heading date relationship network and lay a theoretical foundation for breeding efforts to alter rice ripening dates.

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