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首页> 外文期刊>Environmental Science & Technology >Star Polymer Size, Charge Content and Hydrophobicity Affect their Leaf Uptake and Translocation in Plants
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Star Polymer Size, Charge Content and Hydrophobicity Affect their Leaf Uptake and Translocation in Plants

机译：星形聚合物尺寸，电荷含量和疏水性影响其叶片吸收和植物中的易位

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摘要

Determination of how the properties of nano- carriers of agrochemicals affect their uptake and translocation in plants would enable more efficient agent delivery. Here, we synthesized star polymer nanocarriers poly(acrylic acid)-block- poiy(2-(methylsulnnyl)ethyl acrylate) (PAA-b-PMSEA) and poly- (acrylic acid)-block-poly((2-(methylsulfinyl)ethyl acrylate)-co-(2- (methylthio)ethyl acrylate)) (PAA-b-P(MSEA-co-MTEA)) with well-controlled sizes (from 6 to 35 nm), negative charge content (from 17% to 83% PAA), and hydrophobicity and quantified their leaf uptake, phloem loading, and distribution in tomato (Solatium lycopersicum) plants 3 days after foliar application of 20 μl of a 1g L~(-1) star polymer solution. In spite of their property differences, ～30% of the applied star polymers translocated to other plant organs, higher than uptake of conventional foliar applied agrochemicals (＜5%). The property differences affected their distribution in the plant. The ～6 nm star polymers exhibited 3 times higher transport to younger leaves than larger ones, while the ～35 nm star polymer had over 2 times higher transport to roots than smaller ones, suggesting small star polymers favor symplastic unloading in young leaves, while larger polymers favor apoplastic unloading in roots. For the same sized star polymer, a smaller negative charge content (yielding ζ ～ -12 mV) enhanced translocation to young leaves and roots, whereas a larger negative charge (ζ ＜ -26 mV) had lower mobility. Hydrophobicity only affected leaf uptake pathways, but not translocation. This study can help design agrochemical nanocarriers for efficient foliar uptake and targeting to desired plant organs, which may decrease agrochemical use and environmental impacts of agriculture.
机译：测定农业化学物质纳米载体的性质如何影响其摄取和植物中的易位将使更有效的药剂递送。在此，我们合成星形聚合物纳米载体聚（丙烯酸） - 倍频（2-（甲基烯基）乙基丙烯酸酯）（PAA-B-PMSEA）和聚 - （丙烯酸）-BlOck-poly（（2-（甲基磺酰基））丙烯酸乙酯）-CO-（2-（甲硫基）乙基丙烯酸酯））（PAA-BP（MSEA-CO-MTEA））具有良好控制的尺寸（从6至35nm），负电荷含量（从17％到83在叶片施加20μl1g1（-1）星聚合物溶液后3天，％PAA）和疏水性和量化它们的叶片摄取，韧皮植物载荷和分布3天。尽管他们的财产差异，〜30％的施用星聚合物易用于其他植物器官，高于常规叶面应用的农业化学物质（<5％）的吸收。物业差异影响了其在工厂的分布。 〜6nm的聚合物表现出比较大的叶片更高的叶片3倍，而〜35nm的星形聚合物的运输〜35mm的含量比较小的叶片含量超过2倍，暗示小星聚合物赞成年轻的叶子中的对称卸载，而更大聚合物赞成在根中的痉挛卸载。对于相同大小的星形聚合物，较小的负电荷含量（产生ζ〜-12mV）增强易位与幼叶和根部的易位，而较大的负电荷（ζ-26mV）具有较低的迁移率。疏水性仅受影响的叶片吸收途径，但不是易位。该研究可以帮助设计农业化学纳米载体，以实现有效的叶状吸收和靶向所需的植物器官，这可能降低农业的农业化学利用和环境影响。

著录项

  • 来源
    《Environmental Science & Technology》 |2021年第15期|10758-10768|共11页
  • 作者

    Yilin Zhang; Liye Fu; Sipei Li; Jiajun Yan; Mingkang Sun; Juan Pablo Giraldo; Krzysztof Matyjaszewski; Robert D. Tilton; Gregory V. Lowry;

  • 作者单位

    Department of Civil and Environmental Engineering and Center for Environmental Implications of Nano Technology (CEINT) Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States;

    Department of Chemistry Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States;

    Department of Chemistry Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States;

    Department of Chemistry Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States;

    Department of Chemistry Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States;

    Department of Botany and Plant Sciences University of California Riverside California 92521 United States;

    Department of Chemistry Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States;

    Center for Environmental Implications of Nano Technology (CEINT) Department of Chemical Engineering and Department of Biomedical Engineering Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States;

    Department of Civil and Environmental Engineering and Center for Environmental Implications of Nano Technology (CEINT) Carnegie Mellon University Pittsburgh Pennsylvania 15213 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

    star polymer; agent delivery; phloem loading; foliar application; agrochemicals;

    机译：星聚合物;代理商交付;phloem loading;叶面申请;农用化学品;

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