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首页> 外文期刊>Environmental Science & Technology >Silver Nanoparticles Alter Soil Microbial Community Compositions and Metabolite Profiles in Unplanted and Cucumber-Planted Soils
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Silver Nanoparticles Alter Soil Microbial Community Compositions and Metabolite Profiles in Unplanted and Cucumber-Planted Soils

机译：银纳米颗粒改变未种植和黄瓜种植土壤中的微生物群落组成和代谢物谱

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The rapid development of nanotechnology makes the environmental impact assessment a necessity to ensure the sustainable use of engineered nanomaterials. Here, silver nanoparticles (AgNPs) at 100 mg/kg were added to soils in the absence or presence of cucumber (Cucumis sativa) plants for 60 days. The response of the soil microbial community and associated soil metabolites was investigated by 16S rRNA gene sequencing and gas chromatography-mass spectrometry (GC-MS)-based metabolomics, respectively. The results show that AgNP exposure significantly increased the soil pH in both unplanted and cucumber-planted soils. The soil bacterial community structure was altered upon Ag exposure in both soils. Several functionally significant bacterial groups, which are associated with carbon, nitrogen, and phosphorus cycling, were compromised by AgNPs in both unplanted and cucumber-planted soils. Generally, plants played a limited role in mediating the impact of AgNPs on the bacterial community. Soil metabolomic analysis showed that AgNPs altered the metabolite profile in both unplanted and cucumber-planted soils. The significantly changed metabolites are involved in sugar and amino acid-related metabolic pathways, indicating the perturbation of C and N metabolism, which is consistent with the bacterial community structure results. In addition, several fatty acids were significantly decreased upon exposure to AgNPs in both unplanted and cucumber-planted soils, suggesting the possible oxidative stress imposed on microbial cell membranes. These results provide valuable information for understanding the biological and biochemical impact of AgNP exposure on both plant species and on soil microbial communities; such understanding is needed to understand the risk posed by these materials in the environment.
机译：纳米技术的飞速发展使得环境影响评估成为确保可持续利用工程纳米材料的必要条件。在这里，在不存在或存在黄瓜（Cucumis sativa）植物的情况下，将100 mg / kg的银纳米颗粒（AgNPs）添加到土壤中60天。分别通过16S rRNA基因测序和基于气相色谱-质谱（GC-MS）的代谢组学研究了土壤微生物群落和相关的土壤代谢产物的响应。结果表明，AgNP暴露显着提高了未种植和黄瓜种植土壤的pH值。在两种土壤中暴露于银后，土壤细菌群落结构发生了变化。 AgNP在未种植和黄瓜种植的土壤中都破坏了几个与碳，氮和磷循环相关的重要功能细菌群。通常，植物在调解AgNP对细菌群落的影响方面起着有限的作用。土壤代谢组学分析表明，AgNPs改变了未种植和黄瓜种植土壤中的代谢产物谱。显着变化的代谢物参与糖和氨基酸相关的代谢途径，表明C和N代谢的扰动，这与细菌群落结构的结果一致。此外，在未种植和黄瓜种植的土壤中，暴露于AgNPs后，几种脂肪酸均显着降低，表明可能对微生物细胞膜施加了氧化应激。这些结果为理解AgNP暴露对植物物种和土壤微生物群落的生物学和生化影响提供了有价值的信息;需要进行此类了解才能了解这些材料在环境中带来的风险。

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  • 来源
    《Environmental Science & Technology》 |2020年第6期|3334-3342|共9页
  • 作者

    Huiling Zhang; Min Huang; Wenhui Zhang; Jorge L. Gardea-Torresdey; Jason C. White; Rong Ji; Lijuan Zhao;

  • 作者单位

    State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing 210023 China;

    Department of Chemistry and Biochemistry The University of Texas at El Paso El Paso Texas 79968 United States;

    Analytical Chemistry The Connecticut Agricultural Experiment Station (CAES) New Haven Connecticut 06S04 United States;

    Slflte Key laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing 210023 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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