文献类型： 外文期刊
作者： Li, Yong 1 ; Long, Ling 1 ; Ge, Jing 1 ; Li, Haocong 1 ; Zhang, Meng 1 ; Wan, Qun 1 ; Yu, Xiangyang 1 ;
作者机构： 1.Minist Sci & Technol, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base, 50 Zhongling St, Nanjing 210014, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Food Safety & Nutr, 50 Zhongling St, Nanjing 210014, Jiangsu, Peoples R China
3.Jiangsu Univ, Sch Environm & Safety Engn, 301 Zhenjiang City Univ Rd, Zhenjiang 212001, Jiangsu, Peoples R China
关键词： nontargeted metabolomics; imidacloprid; vegetable growth; plant uptake; pesticide metabolite
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）
ISSN： 0021-8561
年卷期： 2019 年 67 卷 26 期
页码：
收录情况： SCI
摘要： In the present study, the effect of imidacloprid uptake from contaminated soils on the growth of leaf vegetable Shanghaiqing was investigated. The result showed that during 35-day exposure, the concentration of imidacloprid (IMI) was in the order of vegetable shoots > vegetable roots > soil, indicating that IMI was more readily concentrated in vegetable shoots than in roots. Moreover, the biomass of IMI-treated vegetable shoots was comparable to that of the controls with early exposure, but was higher than that of the controls after 7-day exposure, showing that the test concentration of IMI could stimulate vegetable growth. The plant metabolic analysis of vegetable shoots using LC-QTOF/MS revealed that IMI may cause oxidative stress to the plant shoots with early exposure; however, the stressful situation of IMI seems to be relieved with the increase of some substances (such as spermidine and phenylalanine) with late exposure. Moreover, the upregulation of N-rich amino acids (glutamine, aspartate, and arginine) suggested that the process of fixing inorganic nitrogen in the plant should be enhanced, possibly contributing to enhanced growth rates. Additionally, four IMI's metabolites were identified by using MS-FINDER software, and the distribution of three metabolites in vegetable tissues was compared.
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