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首页> 外文期刊>Environmental Science & Technology >Charge, Size, and Cellular Selectivity for Multiwall Carbon Nanotubes by Maize and Soybean
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Charge, Size, and Cellular Selectivity for Multiwall Carbon Nanotubes by Maize and Soybean

机译：玉米和大豆对多壁碳纳米管的电荷，大小和细胞选择性

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摘要

Maize (Zea mays) and soybean (Glycine max) were used as model food-chain plants to explore vegetative uptake of differently charged multiwall carbon nanotubes (MWCNTs). Three types of MWCNTs, including neutral pristine MWCNT (p-MWCNT), positively charged MWCNT-NH_2, and negatively charged MWCNT-COOH, were directly taken-up and translocated from hydroponic solution to roots, stems, and leaves of maize and soybean plants at the MWCNT concentrations ranging from 10.0 to 50.0 mg/L during 18-day exposures. MWCNTs accumulated in the xylem and phloem cells and within specific intracellular sites like the cytoplasm, cell wall, cell membrane, chloroplast, and mitochondria, which was observed by transmission electron microscopy. MWCNTs stimulated the growth, of maize and inhibited the growth of soybean at the exposed doses. The cumulative transpiration of water in maize exposed to 50 mg/L of MWCNT-COOHs was almost twice as much as that in the maize control. Dry biomass of maize exposed to MWCNTs was greater than that of maize control. In addition, the uptake and translocarion of these MWCNTs clearly exhibited cellular, charge, and size selectivity in maize and soybean, which could be important properties for nanotransporters. This is the first report of cellular, charge, and size selectivity on the uptake by whole food plants for three differently charged MWCNTs.
机译：玉米（Zea mays）和大豆（Glycine max）被用作模型食物链植物，以探索不同电荷的多壁碳纳米管（MWCNT）的营养吸收。直接吸收中性原始碳纳米管（p-MWCNT），带正电的MWCNT-NH_2和带负电的MWCNT-COOH三种类型的MWCNT，并将其从水培溶液转移至玉米和大豆植物的根，茎和叶。在暴露18天期间，MWCNT的浓度范围为10.0至50.0 mg / L。 MWCNTs积累在木质部和韧皮部细胞中以及特定的胞内位点内，如细胞质，细胞壁，细胞膜，叶绿体和线粒体，这是通过透射电子显微镜观察到的。在暴露剂量下，MWCNTs刺激了玉米的生长，并抑制了大豆的生长。暴露于50 mg / L MWCNT-COOHs的玉米中水分的累积蒸腾量几乎是玉米对照中的两倍。暴露于多壁碳纳米管的玉米干生物量大于玉米对照。此外，这些多壁碳纳米管的吸收和转运明显表现出在玉米和大豆中的细胞，电荷和尺寸选择性，这对于纳米转运蛋白可能是重要的特性。这是关于整个食物工厂对三种带不同电荷的MWCNT摄取的细胞，电荷和大小选择性的首次报道。

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  • 来源
    《Environmental Science & Technology》 |2015年第12期|7380-7390|共11页
  • 作者

    Guangshu Zhai; Sarah M. Gutowski; Katherine S. Walters; Bing Yan; Jerald L. Schnoor;

  • 作者单位

    Department of Civil and Environmental Engineering and IIHR Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa 52242, United States;

    Department of Civil and Environmental Engineering and IIHR Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa 52242, United States;

    Central Microscopy Research Facility, The University of Iowa, Iowa City, Iowa 52242, United States;

    School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;

    Department of Civil and Environmental Engineering and IIHR Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa 52242, 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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