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首页> 外文期刊>Environmental Science & Technology >Uptake Kinetics, Accumulation, and Long-Distance Transport of Organophosphate Esters in Plants: Impacts of Chemical and Plant Properties
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Uptake Kinetics, Accumulation, and Long-Distance Transport of Organophosphate Esters in Plants: Impacts of Chemical and Plant Properties

机译：植物中有机磷酸酯的吸收动力学，积累和远距离迁移：化学和植物特性的影响

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摘要

The uptake, accumulation, and long-distance transport of organophosphate esters (OPEs) in four kinds of plants were investigated by hydroponic experiments. The uptake kinetics (k(1,root)) of OPEs in plant roots were determined by the binding of OPEs with the proteins in plant roots and apoplastic sap for the hydrophobic compounds, which correlated well with the transpiration capacity of the plants for the hydrophilic compounds. However, the accumulation capacity of OPEs in plant root was controlled by the partition of OPEs to plant lipids. As a consequence, OPEs were taken up the fastest in wheat root as a result of its highest protein content but least accumulated as a result of its lowest lipid content. The translocation factor of the OPEs decreased quickly with the hydrophobicity (log K-ow) increasing, suggesting that the hydrophobic OPEs were hard to translocate from roots to shoots. The hydrophilic OPEs, such as tris(2-chloroisopropyl) phosphate and tris(2-butoxyethyl) phosphate, were ambimobile in the plant xylem and phloem, suggesting that they could move to the edible parts of plants and enhanced risk to human health.
机译：通过水培试验研究了四种植物中有机磷酸酯（OPE）的吸收，积累和远距离迁移。通过植物油中的OPE与植物根中蛋白质的结合以及疏水性树液的疏​​水性化合物的结合来确定植物根中的OPE的吸收动力学（k（1，root）），这与植物对亲水性的蒸腾能力密切相关化合物。然而，OPEs在植物根部的积累能力是由OPEs与植物脂质的分配控制的。因此，由于其蛋白质含量最高，因此在小麦根部吸收的OPE最快，而由于其脂质含量最低，因此OPE积累最少。随着疏水性（log K-ow）的增加，这些OPEs的易位因子迅速下降，这表明疏水性OPEs很难从根部转移到芽。亲水性OPE（例如磷酸三（2-氯异丙基）酯和磷酸三（2-丁氧基乙基）酯）在植物木质部和韧皮部中可移动，这表明它们可以移动到植物的可食用部分，并增加对人类健康的风险。

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  • 来源
    《Environmental Science & Technology》 |2019年第9期|4940-4947|共8页
  • 作者

    Liu Qing; Wang Xiaolei; Yang Rongyan; Yang Liping; Sun Binbin; Zhu Lingyan;

  • 作者单位

    Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Tianjin Key Lab Environm Remediat & Pollut Contro, Minist Educ,Coll Environm Sci & Engn, Tianjin 300350, Peoples R China;

    Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Tianjin Key Lab Environm Remediat & Pollut Contro, Minist Educ,Coll Environm Sci & Engn, Tianjin 300350, Peoples R China;

    Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Tianjin Key Lab Environm Remediat & Pollut Contro, Minist Educ,Coll Environm Sci & Engn, Tianjin 300350, Peoples R China;

    Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Tianjin Key Lab Environm Remediat & Pollut Contro, Minist Educ,Coll Environm Sci & Engn, Tianjin 300350, Peoples R China;

    Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Tianjin Key Lab Environm Remediat & Pollut Contro, Minist Educ,Coll Environm Sci & Engn, Tianjin 300350, Peoples R China;

    Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Tianjin Key Lab Environm Remediat & Pollut Contro, Minist Educ,Coll Environm Sci & Engn, Tianjin 300350, Peoples R China;

  • 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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