Loss of soil microbial diversity may increase insecticide uptake by crop

文献类型： 外文期刊

第一作者： Zhang, Min

作者： Zhang, Min;Son, Alin;Yu, Bing;Zhang, Xiaoxia;Fan, Fenliang;Liang, Yongchao;Zeng, Xibai;Sun, Baoli;Chen, Ming-Shun;Chen, Ming-Shun;Yin, Huaqun

作者机构：

关键词： Soil biodiversity;Insecticide;Food safety;High-throughput sequencing;Functional redundancy;Disproportionally complementary growth

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：5.567； 五年影响因子：6.064 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Belowground biodiversity is essential for soil functioning, but the effect of belowground biodiversity loss on food safety is unknown. We investigated the loss of soil microbial diversity on insecticides accumulation in Brassica. We manipulated soil biodiversity using the dilution-to-extinction approach in a Brassica-soil-insecticide system, monitored microbial communities via high-throughput sequencing, and identified potential functional microbes. Compared with unsterilized soil, the richness of functional bacteria was reduced by 14.1%, 36.2%, 51.6% and 73.2%, respectively, in the corresponding sterilized soil inoculated with 1-, 10(-2)-, 10(-4)- and 10(-6)-fold diluted soil suspension. The acetamiprid and imidacloprid concentrations increased significantly in Brassica tissues grown in sterilized soil inoculated with 10(-6) fold diluted suspension. A bacterial group predominated in functional microbes of soils inoculated with 1-,10(-2)- or 10(-4)-fold diluted suspension, but the relative abundance declined in soil inoculated with a 10(-6)-fold diluted suspension. Our findings revealed that undesirable impacts by the loss of soil biodiversity at an intermediate level on the accumulation of soil contaminant in plants could be alleviated by microbial functional redundancy through disproportionally complementary growth of specific functional microbial taxa, but severe loss of soil biodiversity would threaten food safety. (C) 2017 Elsevier B.V. All rights reserved.

分类号： S

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