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Sodium selenite-carbon dots nanocomposites enhance acaricidal activity of fenpropathrin: Mechanism and application

文献类型：外文期刊

第一作者： Qi, Cuicui

作者： Qi, Cuicui;Xu, Zhifeng;Qian, Kun;Shen, Guangmao;Rong, Shuang;Zhang, Chenghao;Zhang, Ping;He, Lin;Qi, Cuicui;Xu, Zhifeng;Qian, Kun;Shen, Guangmao;Rong, Shuang;Zhang, Chenghao;Zhang, Ping;He, Lin;Qi, Cuicui;Xu, Zhifeng;Qian, Kun;Shen, Guangmao;Rong, Shuang;Zhang, Chenghao;Zhang, Ping;He, Lin;Ma, Chuanxin;Zhang, Youjun

作者机构：

关键词： P450; Fenpropathrin; Acaricidal activity; Tetranychus cinnabarinus; Selenium-CDs

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （影响因子：7.963；五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2021 年 777 卷

页码：

收录情况： SCI

摘要： As an essential trace element, selenium can be used to protect crops from pests, while, in nature, most crops cannot accumulate enough selenium from the soil to reach the effective dose for pest control. In this study, carbon dots modified with arginine in nano-scale was prepared and characterized, then, it was combined with sodium selenite to form selenium-carbon dots (Se-CDs). Function evaluation of Se-CDs showed that it could increase the absorption of selenium in plant leaves, promote the control efficiency of fenpropathrin, and protect plant from damage caused by Tetranychus cinnabarinus. In addition, we found that expressions of P450 genes and activity of P450 enzyme both decreased in selenium treated mites. In vivo, the acaricidal activity of fenpropathrin increased significantly when one of the P450 genes, CYP389B1, was silenced, and the recombinant protein of CYP389B1 could metabolize fenpropathrin in vitro. The results suggested that inhibiting the expression of P450 gene and repressing the detoxification of T. cinnabarinus was the molecular mechanism that how selenium promoted the acaricidal activity of fenpropathrin. The application of Se-CDs in the field will decrease the use of chemicals acaricides, reduce chemical residues, and ensure the safety of agricultural products. (c) 2021 Elsevier B.V. All rights reserved.

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