数字农科院2.0

Carbon dots based cascading nanozymes mitigate phytotoxicity in lettuces under imidacloprid stress

文献类型： 外文期刊

作者： Chen, Fengqiong;Zhou, Ziyan;Yang, Na;Jiang, Qin;Zhang, Xuejie;Zhang, Haoran;Zheng, Yinjian;Li, Wei;Lei, Bingfu

作者机构：

关键词： Carbon dots (CDs);Lettuces;Imidacloprid (IMI) stress;Detoxification;Antioxidant;Food safety

期刊名称： FOOD CHEMISTRY

ISSN： 0308-8146

年卷期： 2024 年 464 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Improper pesticide use induces oxidative stress and disrupts detoxification systems in plants. We synthesized CDs with cascading nanozyme activities to mitigate phytotoxicity in lettuces under imidacloprid (IMI) stress. CDs exhibit superoxide dismutase-like (SOD-like) and peroxidase-like (POD-like) activities. Surface modifications and analysis of CDs, the SOD-like activity relies on the -NH2, -COOH, and -OH groups for binding superoxide anions (O2 center dot-), while POD-like activity depends on -COOH and C--O groups, also, C--O group provides It-system and the electron-deficient structure for electron transfer. Practically, under IMI stress, CDs strengthen multiple defense systems in lettuces, reducing levels of reactive oxygen toxicity (O2 center dot-, H2O2, and MDA, by 26.77 %, 48.52 %, and 13.10 %, respectively). Meanwhile, CDs upregulate detoxification gene expression, resulting in a 42.74 % reduction in IMI residue in lettuces. Moreover, the acceptable daily intake of IMI in lettuces treated with CDs was less than 18.0 % of the reference dose, even at high-concentration IMI.

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