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当前位置: 首页 > 文章 > Heat-inducible SlWRKY3 confers thermotolerance by activating the SlGRXS1 gene cluster in tomato 园艺学报(英文版) 2024,10 (2)
Position: Home > Articles > Heat-inducible SlWRKY3 confers thermotolerance by activating the SlGRXS1 gene cluster in tomato Horticultural Plant Journal 2024,10 (2)

Heat-inducible SlWRKY3 confers thermotolerance by activating the SlGRXS1 gene cluster in tomato

作  者：
Ying Wang;Wen-Xian Gai;Liangdan Yuan;Lele Shang;Fangman Li;Zhong‐Liang Gong;Pingfei Ge;Yaru Wang;Jinbao Tao;Xingyu Zhang;Haiqiang Dong;Yuyang Zhan
单  位：
National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Huazhong Agricultural University, Wuhan, 430070, Chin;National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Huazhong Agricultural University, Wuhan, 430070, China;Hubei Hongshan Laboratory, Wuhan, 430070, China
关键词：
Tomato;WRKY transcription factor;SlWRKY3;Thermotolerance;SlGRXS1;Gene cluster;Abiotic stres
摘  要：
High temperature stress is one of the major environmental factors that affect the growth and development of plants. Although WRKY transcription factors play a critical role in stress responses, there are few studies on the regulation of heat stress by WRKY transcription factors, especially in tomato. Here, we identified a group I WRKY transcription factor, SlWRKY3, involved in thermotolerance in tomato. First, SlWRKY3 was induced and upregulated under heat stress. Accordingly, overexpression of SlWRKY3 led to an increase, whereas knock-out of SlWRKY3 resulted in decreased tolerance to heat stress. Overexpression of SlWRKY3 accumulated less reactive oxygen species (ROS), whereas knock-out of SlWRKY3 accumulated more ROS under heat stress. This indicated that SlWRKY3 positively regulates heat stress in tomato. In addition, SlWRKY3 activated the expression of a range of abiotic stress-responsive genes involved in ROS scavenging, such as a SlGRXS1 gene cluster. Further analysis showed that SlWRKY3 can bind to the promoters of the SlGRXS1 gene cluster and activate their expression. Collectively, these results imply that SlWRKY3 is a positive regulator of thermotolerance through direct binding to the promoters of the SlGRXS1 gene cluster and activating their expression and ROS scavenging.

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