Wheat lesion mimic homology gene TaCAT2 enhances plant resistance to biotic and abiotic stresses

文献类型： 外文期刊

第一作者： Han, Shuo

作者： Han, Shuo;Han, Xiaowen;Li, Yiting;Li, Keke;Yin, Junliang;Fang, Zhengwu;Yin, Junliang;Gong, Shuangjun

作者机构：

关键词： Catalase; Disease resistance; Function validation; Gene silencing; ROS accumulation

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：7.7； 五年影响因子：7.7 ）

ISSN： 0141-8130

年卷期： 2024 年 277 卷

页码：

收录情况： SCI

摘要： Lesion mimic mutants (LMMs) refer to the spontaneous formation of disease-like spots on leaves without any obvious pathogen infection. The LMM genes can regulate plant immunity, thus promoting the defense of crops against pathogens. However, there is a lack of systematic understanding of the regulatory mechanism of LMMs s in wheat. This study identified a wheat LMM TaCAT2, , a homolog of the Arabidopsis CAT2. . The prediction of the cis- regulatory element revealed that TaCAT2 was involved in the response of plants to various hormones and stresses. RT-qPCR analysis indicated that TaCAT2 was significantly up-regulated by NaCl, drought, and Fusarium graminearum infection. Fluorescence microscopy showed that the TaCAT2 was localized to the peroxisome. Overexpression of TaCAT2 enhanced plant resistance to Phytophthora infestation and F. graminearum by constitutionally activating SA and JA pathways. VIGS of TaCAT2 enhanced the sensitivity of wheat to F. graminearum. . Further, TaCAT2 enhanced stress resistance by scavenging the excessive ROS and increasing the activities of antioxidative enzymes. This study lays the basis for the functional identification of TaCAT2 and its applicability in the disease resistance of wheat.

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