Comparison of uptake, translocation and accumulation of several neonicotinoids in komatsuna (Brassica rapa var. perviridis) from contaminated soils

文献类型： 外文期刊

第一作者： Li, Yong

作者： Li, Yong;Long, Ling;Yan, Huangqian;Ge, Jing;Cheng, Jinjin;Yu, Xiangyang;Li, Yong;Long, Ling;Yan, Huangqian;Ge, Jing;Cheng, Jinjin;Yu, Xiangyang;Long, Ling;Ren, Liyun

作者机构：

关键词： Neonicotinoid; Uptake; Translocation; Root concentration factor; Vegetable

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2018 年 200 卷

页码：

收录情况： SCI

摘要： The accumulation of pesticides in vegetables may have serious effects on human health and ecosystems via food chains; therefore, it is of great importance to investigate the uptake and accumulation behaviours of pesticides in vegetable tissues. In the present study, the uptake, translocation and accumulation of five neonicotinoids, thiamethoxam (THIM), clothianidin (CLO), thiacloprid (TH1D), acetamiprid (ACE) and dinotefuran (DIN), in komatsuna (Brassica rapa var. perviridis, a vegetable) were investigated. The concentrations of neonicotinoids in vegetable tissues ranged from 0.068 +/- 0.002 to 29.6 +/- 2.5 mg/kg. During the cultivation (except for the first day), the concentration of each neonicotinoid in shoots was the highest, followed by roots and the soil. The concentrating of neonicotinoids from the soil to roots followed the order of THIM > CLO > THID > DIN > ACE, while the order of the ability of translocation neonicotinoids from roots to shoots was the just opposite. The difference in uptake and translocation behaviours of the test neonicotinoids seems to be not correlated with the octanol/water partition coefficient (logR(ow)), water solubility or dissociation constant (pK(a)), but significantly correlated with molecular weight. In addition, a greater concentration of the THIM-metabolite clothianidin (M-CLO) was detected in vegetable shoots than in roots and the soil. (C) 2018 Elsevier Ltd. All rights reserved.

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