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首页> 外文期刊>Journal of Hazardous Materials >Effect of surface coating and organic matter on the uptake of CeO_2 NPs by corn plants grown in soil: Insight into the uptake mechanism
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Effect of surface coating and organic matter on the uptake of CeO_2 NPs by corn plants grown in soil: Insight into the uptake mechanism

机译：表面涂层和有机质对土壤中玉米生长对CeO_2 NPs吸收的影响：吸收机理的认识

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摘要

Little is known about the fate, transport, and bioavailability of CeO_2 nanoparticles (NPs) in soil. Moreover, there are no reports on the effect of surface coating upon NPs uptake by plants. In this study, lea mays plants were grown for one month in unenriched and organic soils treated with coated and uncoated CeO_2 NPs. In addition, plants were exposed to fluorescein isothiocyanate (FITC)-stained CeO_2 NPs and analyzed in a confocal microscope. In organic soil, roots from uncoated and coated NPs at 100,200,400, and 800 mg kg~(-1) had 40, 80, 130, and 260% and 10, 70, 90, and 40% more Ce, respectively, compared to roots from unenriched soil. Conversely, shoots of plants from unenriched soil had significantly more Ce compared with shoots from organic soil. Confocal fluorescence images showed FITC-stained CeO_2 NP aggregates in cell walls of epidermis and cortex, suggesting apoplastic pathway. The μXRF results revealed the presence of CeO_2 NP aggregates within vascular tissues. To the authors knowledge this is the first report on the effects of surface coating and organic matter on Ce uptake from CeO_2 NPs and upon the mechanisms of CeO_2 NPs uptake by higher plants.
机译：关于土壤中CeO_2纳米颗粒（NPs）的命运，运输和生物利用度知之甚少。而且，没有关于表面涂层对植物吸收NPs的影响的报道。在这项研究中，在经过涂覆和未涂覆的CeO_2 NP处理的未富集和有机土壤中，阔叶植物生长了一个月。另外，将植物暴露于异硫氰酸荧光素（FITC）染色的CeO_2 NP并在共聚焦显微镜下进行分析。在有机土壤中，未包被和包被的NP分别以100,200,400和800 mg kg〜（-1）的根比根分别多40、80、130和260％以及10、70、90和40％的Ce。来自未富集的土壤。相反，与有机土壤相比，未富集土壤的植物芽具有更高的铈。共聚焦荧光图像显示FITC染色的CeO_2 NP聚集在表皮和皮质的细胞壁中，暗示了质外途径。 μXRF结果表明在血管组织中存在CeO_2 NP聚集体。据作者所知，这是有关表面涂层和有机物对CeO_2 NPs吸收Ce的影响以及高等植物对CeO_2 NPs吸收机理的首次报道。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.131-138|共8页
  • 作者

    Lijuan Zhao; Jose R. Peralta-Videa; Armando Varela-Ramirez; Hiram Castillo-Michel; Chunqiang Li; Jianying Zhang; Renato J. Aguilera; Arturo A. Keller; Jorge L. Gardea-Torresdey;

  • 作者单位

    Chemistry Department. The University of Texas at El Paso, 500 West Univ. Av., El Paso, TX 79968, United States;

    Chemistry Department. The University of Texas at El Paso, 500 West Univ. Av., El Paso, TX 79968, United States;

    Department of Biological Sciences, Border Biomedical Research Center, The University of Texas at El Paso, 500 West Univ. Av., El Paso, TX 79968, United States;

    European Synchrotron Radiation Facility, B.P.220 - 38043 Grenoble Cedex, France;

    Physics Department, The University of Texas at El Paso, 500 West Univ. Av., El Paso, TX 79968, United States;

    Department of Biological Sciences, Border Biomedical Research Center, The University of Texas at El Paso, 500 West Univ. Av., El Paso, TX 79968, United States;

    Department of Biological Sciences, Border Biomedical Research Center, The University of Texas at El Paso, 500 West Univ. Av., El Paso, TX 79968, United States;

    Bren School of Environmental Science & Management, UC Center for the Environmental Implications of Nanotechnology, 3420 Bren Hall, University of California, Santa Barbara, CA 93106, United States;

    Chemistry Department. The University of Texas at El Paso, 500 West Univ. Av., El Paso, TX 79968, United States,Environmental Science and Engineering PhD program, The University of Texas at El Paso, 500 West Univ. Av., El Paso, TX 79968, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CeO_2 NPs; root uptake; translocation; fluorescence; zea mays;

    机译：CeO_2 NPs;根吸收易位荧光玉米;

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