Response of soil microbial communities to engineered nanomaterials in presence of maize (Zea mays L.) plants

文献类型： 外文期刊

第一作者： Zhang, Wenhui

作者： Zhang, Wenhui;Jia, Xiaorong;Chen, Si;Ji, Rong;Zhao, Lijuan;Wang, Jing;Wang, Jing

作者机构：

关键词： Nanomaterials; Rhizosphere; Bacterial community; Soil metabolites; Plant

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）

ISSN： 0269-7491

年卷期： 2020 年 267 卷

页码：

收录情况： SCI

摘要： With the intended application of engineered nanomaterials (ENMs) in agriculture, accurate assessment the effect of these ENMs on soil microbial communities is especially necessary. Here, maize plants were cultivated in soil amended by SiO2, TiO2, and Fe3O4 ENMs (100 mg kg (-1) soil) for four weeks. The impact of ENMs on bacterial community structure of the rhizosphere soil was investigated by using high throughput sequencing. In addition, metabolites of maize rhizosphere soil were quantified by gas chromatography-mass spectrometry (GC-MS) based metabolomics. We found that the disturbance of ENMs on soil microbes are in the follow of Fe3O4>TiO2>SiO2. Exposure of Fe3O4 ENMs significantly reduced the abundance of nitrogen -fixation related bacteria Bradyrhizobiaceae (from 2.94% to 2.40%) and iron-redox bacteria Sediminibacterium (from 2.15% to 2.07%). Additionally, Fe3O4 ENMs significantly increased populations of Nocardioides (from 1.63% to 1.77%), Chitinophaga sancti (from 1.12% to 2.08%), Pantoea (from 1.31% to 2.22%), Rhizobiumand (from 1.41% to 1.74%) and Burkholderia-Paraburkholderia (from 1.50% to 2.09%), which are associated with carbon cycling and plant growth promoting. This study provides a perspective on the response of rhizosphere microbial community and low molecular weight metabolites to ENMs exposure, providing a comprehensive understanding of the environmental risk of ENMs. (c) 2020 Elsevier Ltd. All rights reserved.

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