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Soybean Plants Modify Metal Oxide Nanoparticle Effects on Soil Bacterial Communities

机译:大豆植物修饰金属氧化物纳米颗粒对土壤细菌群落的影响

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摘要

Engineered nanoparticles (ENPs) are entering agricultural soils through land application of nanocontaining biosolids and agrochemicals. The potential adverse effects of ENPs have been studied on food crops and soil bacterial communities separately; however, how ENPs will affect the interacting plant-soil system remains unknown. To address this, we assessed ENP effects on soil microbial communities in soybean-planted, versus implanted, mesocosms exposed to different doses of nano-CeO_2 (0-1.0 g kg~(-1)) or nano-ZnO (0-0.5 g kg~(-1)). Nano-CeO_2 did not affect soil bacterial communities in unplanted soils, but 0.1 g kg~(-1) nano-CeO_2 altered soil bacterial communities in planted soils, indicating that plants interactively promote nano-CeO_2 effects in soil, possibly due to belowground C shifts since plant growth was impacted. Nano-ZnO at 0.5 g kg~(-1) significantly altered soil bacterial communities, increasing some (e.g., Rhizobium and Sphingomonas) but decreasing other (e.g., Ensifer, Rhodospirillaceae, Clostridium, and Azotobacter) operational taxonomic units (OTUs). Fewer OTUs decreased from nano-ZnO exposure in planted (41) versus unplanted (85) soils, suggesting that plants ameliorate nano-ZnO effects. Taken together, plants-potentially through their effects on belowground biogeochemistry-could either promote (i-e., for the 0.1 g kg~(-1) nano-CeO_2 treatment) or limit (ie., for the 0.5 g kg~(-1) nano-ZnO treatment) ENP effects on soil bacterial communities.
机译:工程纳米颗粒(ENPs)通过在土地上施用纳米生物固体和农用化学品进入农业土壤。已分别研究了ENPs对粮食作物和土壤细菌群落的潜在不利影响;然而,ENPs如何影响相互作用的植物-土壤系统仍是未知的。为了解决这个问题,我们评估了ENP对暴露于不同剂量的纳米CeO_2(0-1.0 g kg〜(-1))或纳米ZnO(0-0.5 g千克〜(-1))。纳米CeO_2不会影响未种植土壤中的土壤细菌群落,但是0.1 g kg〜(-1)纳米CeO_2改变了种植土壤中的土壤细菌群落,表明植物可能是由于地下C相互作用促进了土壤中纳米CeO_2的作用。由于植物生长受到影响而发生变化。 0.5 g kg〜(-1)的纳米ZnO显着改变了土壤细菌群落,增加了一些(例如根瘤菌和鞘氨醇单胞菌),但减少了其他(例如Ensifer,Rhodospirillaceae,梭状芽孢杆菌和Azotobacter)操作分类单位(OTU)。在种植土壤(41)和未种植土壤(85)中,纳米氧化锌暴露的OTU减少了,这表明植物改善了纳米氧化锌的作用。两者合计,植物可能通过其对地下生物地球化学的作用而促进(即,对于0.1 g kg〜(-1)纳米CeO_2处理)或极限(即对于0.5 g kg〜(-1) )纳米氧化锌处理)ENP对土壤细菌群落的影响。

著录项

  • 来源
    《Environmental Science & Technology》 |2014年第22期|13489-13496|共8页
  • 作者单位

    Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, United States,Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States;

    Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, United States,Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States;

    Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, United States,Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States;

    University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States,Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States;

    Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States,Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, California 93106, United States;

    Department of Environmental Science, Konkuk University, Seoul 143-701, Korea;

    Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States,Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, California 93106, United States;

    University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States,Department of Chemistry, University of Texas at El Paso, El Paso, Texas 79968, United States;

    Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, United States,Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States;

  • 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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  • 正文语种 eng
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