文献类型: 外文期刊
作者: Zhou, Yanbiao 1 ; Zhang, Zhihui 2 ; Zhao, Xinhui 2 ; Liu, Lan 2 ; Tang, Qianying 2 ; Fu, Jun 2 ; Tang, Xiaodan 2 ; Yang, Runqiu 2 ; Lin, Jianzhong 7 ; Liu, Xuanming 7 ; Yang, Yuanzhu 1 ;
作者机构: 1.Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Hunan, Peoples R China
2.Yuan Longping High Tech Agr Co Ltd, Key Lab Southern Rice Innovat & Improvement, Minist Agr & Rural Affairs, Changsha 410001, Hunan, Peoples R China
3.South China Agr Univ, Coll Life Sci, Guangzhou 510642, Peoples R China
4.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430070, Hubei, Peoples R China
5.Hunan Agr Univ, Coll Agron, Changsha 410128, Hunan, Peoples R China
6.Hunan Normal Univ, Coll Life Sci, Changsha 410081, Hunan, Peoples R China
7.Hunan Univ, Coll Biol, Hunan Prov Key Lab Plant Funct Genom & Dev Regulat, Changsha 410082, Hunan, Peoples R China
关键词: STK; Salt stress; Rice; ROS scavenging; ABA
期刊名称:RICE ( 影响因子:5.5; 五年影响因子:5.8 )
ISSN: 1939-8425
年卷期: 2023 年 16 卷 1 期
页码:
收录情况: SCI
摘要: BackgroundSoil salinization is a major abiotic environmental stress factor threatening crop production throughout the world. Salt stress drastically affects the growth, development, and grain yield of rice (Oryza sativa L.), and the improvement of rice tolerance to salt stress is a desirable approach for meeting increasing food demand. Receptor-like cytoplasmic kinases (RLCKs) play essential roles in plant growth, development and responses to environmental stresses. However, little is known about their functions in salt stress. Previous reports have demonstrated that overexpression of an RLCK gene SALT TOLERANCE KINASE (STK) enhances salt tolerance in rice, and that STK may regulate the expression of GST (Glutathione S-transferase) genes.ResultsThe expression of STK was rapidly induced by ABA. STK was highest expressed in the stem at the heading stage. STK was localized at the plasma membrane. Overexpression of STK in rice increased tolerance to salt stress and oxidative stress by increasing ROS scavenging ability and ABA sensitivity. In contrast, CRISPR/Cas9-mediated knockout of STK increased the sensitivity of rice to salt stress and oxidative stress. Transcriptome sequencing analysis suggested that STK increased the expression of GST genes (LOC_Os03g17480, LOC_Os10g38140 and LOC_Os10g38710) under salt stress. Reverse transcription quantitative PCR (RT-qPCR) suggested that four stress-related genes may be regulated by STK including OsABAR1, Os3BGlu6, OSBZ8 and OsSIK1.ConclusionsThese findings suggest that STK plays a positive regulatory role in salt stress tolerance by inducing antioxidant defense and associated with the ABA signaling pathway in rice.
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