Exogenous tannic acid relieves imidacloprid-induced oxidative stress in tea tree by activating antioxidant responses and the flavonoid biosynthetic pathway

文献类型： 外文期刊

第一作者： Wang, Yue

作者： Wang, Yue;Pan, Guojun;Ge, Yanqing;Yuan, Chunhao;Wang, Yue;Huang, Tingjie;Zhang, Tao;Lin, Jin;Zhou, Guangshuo;Ma, Xiaoping;Xu, Yongyu;Zou, Nan;Song, Lubin;Yuan, Chunhao;Zou, Nan

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关键词： Tannic acid; Pesticide oxidative stress; Antioxidant responses; Flavonoid biosynthetic pathway; Tea

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.8； 五年影响因子：6.9 ）

ISSN： 0147-6513

年卷期： 2023 年 266 卷

页码：

收录情况： SCI

摘要： Pesticide stress on plants is receiving increased scrutiny due to its effect on plant secondary metabolism and nutritional quality. Tannic acid (TA) is a natural polyphenolic compound showing excellent antioxidant properties and is involved in alleviating stress. The present study thoroughly investigated the effects and mechanism of exogenous TA on relieving imidacloprid (IMI) stress in tea plants. Our research found that TA(10 mg/L) activated the antioxidant defense system, enhanced the antioxidant ability, reduced the accumulation of ROS and membrane peroxidation, and notably promoted tea plant tolerance to imidacloprid stress. Additionally, TA boosted photosynthetic capacity, strengthened the accumulation of nutrients. regulated detoxification meta-bolism, and accelerated the digestion and metabolism of imidacloprid in tea plants. Furthermore, TA induced significant changes in 90 important metabolites in tea, targeting 17 metabolic pathways through extensively targeted metabolomics. Specifically, TA activated the flavonoid biosynthetic pathway, resulting in a 1.3-to 3.1 -fold increase in the levels of 17 compounds and a 1.5-to 63.8-fold increase in the transcript level of related genes, such as ANR, LAR and CHS in this pathway. As a potential tea health activator, TA alleviates the oxidative damage caused by imidacloprid and improves the yield and quality of tea under pesticide stress.

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