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首页> 外文期刊>Journal of Hazardous Materials >Root uptake and phytotoxicity of nanosized molybdenum octahedral clusters
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Root uptake and phytotoxicity of nanosized molybdenum octahedral clusters

机译：纳米钼八面体簇的根吸收和植物毒性

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摘要

Here are examined the root uptake and phytotoxicity of octahedral hexamolybdenum clusters on rape-seed plants using the solid state compound Cs_2Mo_6Br_(14) as cluster precursor. [Mo_6Br_(14)]~(2-) cluster units are nanosized entities offering a strong and stable emission in the near-infrared region with numerous applications in biotechnology. To investigate cluster toxicity on rapeseed plants, two different culture systems have been set up, using either a water-sorbing suspension of cluster aggregates or an ethanol-sorbing solution of dispersed nanosized clusters. Size, shape, surface area and state of clusters in both medium were analyzed by FE-SEM, BET and XPS. The potential contribution of cluster dissolution to phytotoxicity was evaluated by ICP-OES and toxicity analysis of Mo, Br and Cs. We showed that the clusters did not affect seed germination but greatly inhibited plant growth. This inhibition was much more important when plants were treated with nanosized entities than with microsized cluster aggregates. In addition, nanosized clusters affected the root morphology in a different manner than microsized cluster aggregates, as shown by FE-SEM observations. The root penetration of the clusters was followed by secondary ion mass spectroscopy with high spatial resolution (NanoSIMS) and was also found to be much more important for treatments with nanosized clusters.
机译：这里研究了使用固态化合物Cs_2Mo_6Br_（14）作为簇前体的油菜种子植物八面体六钼簇的根吸收和植物毒性。 [Mo_6Br_（14）]〜（2-）簇单元是纳米尺寸的实体，可在近红外区域提供强而稳定的发射，并在生物技术中有许多应用。为了研究对菜籽植物的簇毒性，已经建立了两种不同的培养系统，使用簇聚集体的吸水悬浮液或分散的纳米大小簇的乙醇吸附溶液。通过FE-SEM，BET和XPS分析了两种培养基中簇的大小，形状，表面积和状态。通过ICP-OES以及Mo，Br和Cs的毒性分析评估了簇溶解对植物毒性的潜在贡献。我们表明，簇不影响种子发芽，但大大抑制了植物的生长。当用纳米尺寸的实体处理植物时，这种抑制作用要比使用微米尺寸的簇聚集体处理更为重要。此外，如FE-SEM观察结果所示，纳米团簇以与微米团簇不同的方式影响根系形态。簇的根部渗透之后是具有高空间分辨率的二次离子质谱法（NanoSIMS），并且发现其对于纳米簇的处理更为重要。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第15期|p.111-118|共8页
  • 作者

    Tangi Aubert; Agnes Burel; Marie-Andree Esnault; Stephane Cordier; Fabien Grasset; Francisco Cabello-Hurtado;

  • 作者单位

    Solid State Chemistry and Materials Croup, UMR CNRS 6226 Sciences Chimiques de Rennes, University of Rennes I,263 av. du General Leclerc. Campus de Beaulieu.35042 Rennes, France;

    Electronic Microscopy Department, University ofRennes 1,2av. du Professeur Leon-Bernard, Campus de Villejean, 35043 Rennes, France;

    Mechanisms at the Origin of Biodiversity Team, UMR CNRS 6553 Ecobio. University ofRennes 1,263 av. du General Leclerc. Campus de Beaulieu. 35042 Rennes, France;

    Solid State Chemistry and Materials Croup, UMR CNRS 6226 Sciences Chimiques de Rennes, University of Rennes I,263 av. du General Leclerc. Campus de Beaulieu.35042 Rennes, France;

    Solid State Chemistry and Materials Croup, UMR CNRS 6226 Sciences Chimiques de Rennes, University of Rennes I,263 av. du General Leclerc. Campus de Beaulieu.35042 Rennes, France;

    Mechanisms at the Origin of Biodiversity Team, UMR CNRS 6553 Ecobio. University ofRennes 1,263 av. du General Leclerc. Campus de Beaulieu. 35042 Rennes, France;

  • 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

    nanomaterials; nanotoxicity; metal atom clusters; rapeseed; nanosims;

    机译：纳米材料纳米毒性金属原子团簇;菜子;纳米模拟;

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