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Effects of rare earth oxide nanoparticles on root elongation of plants

机译：稀土氧化物纳米粒子对植物根系伸长的影响

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摘要

The phytotoxicity of four rare earth oxide nanoparticles, nano-CeO_2, nano-La_2O_3, nano-Gd_2O_3 and nano-Yb_2O_3 on seven higher plant species (radish, rape, tomato, lettuce, wheat, cabbage, and cucumber) were investigated in the present study by means of root elongation experiments. Their effects on root growth varied greatly between different nanoparticles and plant species. A suspension of 2000 mg L~(-1) nano-CeO_2 had no effect on the root elongation of six plants, except lettuce. On the contrary, 2000 mg L~(-1) suspensions of nano-La_2O_3, nano-Gd_2O_3 and nano-Yb_2O_3 severely inhibited the root elongation of all the seven species. Inhibitory effects of nano-La_2O_3, nano-Gd_2O_3, and nano-Yb_2O_3 also differed in the different growth process of plants. For wheat, the inhibition mainly took place during the seed incubation process, while lettuce and rape were inhibited on both seed soaking and incubation process. The fifty percent inhibitory concentrations (IC_(50)) for rape were about 40 mg L~(-1) of nano-La_2O_3, 20 mg L~(-1) of nano-Gd_2O_3, and 70 mg L~(-1) of nano-Yb_2O_3, respectively. In the concentration ranges used in this study, the RE~(3+) ion released from the nanoparticles had negligible effects on the root elongation. These results are helpful in understanding phytotoxicity of rare earth oxide nanoparticles.
机译：目前研究了四种稀土氧化物纳米颗粒，即纳米CeO_2，纳米La_2O_3，纳米Gd_2O_3和纳米Yb_2O_3对七个高等植物物种（萝卜，油菜，番茄，生菜，小麦，白菜和黄瓜）的植物毒性。通过根伸长实验进行研究。它们对根系生长的影响在不同的纳米颗粒和植物物种之间差异很大。除生菜外，2000 mg L〜（-1）纳米CeO_2悬浮液对6种植物的根伸长没有影响。相反，纳米La_2O_3，纳米Gd_2O_3和纳米Yb_2O_3的2000 mg L〜（-1）悬浮液严重抑制了这七个物种的根伸长。纳米La_2O_3，纳米Gd_2O_3和纳米Yb_2O_3的抑制作用在植物的不同生长过程中也有所不同。对于小麦而言，抑制作用主要发生在种子培养过程中，而生菜和油菜在种子浸种和培养过程中均受到抑制。油菜的50％抑制浓度（IC_（50））约为40 mg L〜（-1）纳米La_2O_3、20 mg L〜（-1）纳米Gd_2O_3和70 mg L〜（-1）分别为纳米Yb_2O_3。在本研究使用的浓度范围内，从纳米粒子释放的RE〜（3+）离子对根伸长的影响可忽略不计。这些结果有助于理解稀土氧化物纳米颗粒的植物毒性。

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  • 来源
    《Chemosphere》 |2010年第3期|273-279|共7页
  • 作者

    Yuhui Ma; Linglin Kuang; Xiao He; Wei Bai; Yayun Ding; Zhiyong Zhang; Yuliang Zhao; Zhifang Chai;

  • 作者单位

    Key Laboratory for Bio-Environmental Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences. P.O. Box 918, Beijing 100049, China;

    Key Laboratory for Bio-Environmental Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences. P.O. Box 918, Beijing 100049, China;

    Key Laboratory for Bio-Environmental Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences. P.O. Box 918, Beijing 100049, China;

    Key Laboratory for Bio-Environmental Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences. P.O. Box 918, Beijing 100049, China;

    Key Laboratory for Bio-Environmental Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences. P.O. Box 918, Beijing 100049, China;

    Key Laboratory for Bio-Environmental Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences. P.O. Box 918, Beijing 100049, China;

    Key Laboratory for Bio-Environmental Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences. P.O. Box 918, Beijing 100049, China;

    Key Laboratory for Bio-Environmental Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences. P.O. Box 918, Beijing 100049, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    rare earth oxide; nanoparticles; phytotoxicity; root elongation; toxicity effects;

    机译：稀土氧化物纳米粒子植物毒性根伸长毒性作用;

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