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首页> 外文期刊>Environmental Science & Technology >Evaluation of Mercury Stress in Plants from the Almaden Mining District by Analysis of Phytochelatins and Their Hg Complexes
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Evaluation of Mercury Stress in Plants from the Almaden Mining District by Analysis of Phytochelatins and Their Hg Complexes

机译：通过分析植物螯合物及其汞配合物评估阿尔玛登矿区植物的汞胁迫

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摘要

To evaluate plant response to Hg stress,glutathione, phytochelatins, and their Hg complexes were analyzed using HPLC with amperometric detection in samples of Asparagus acutifolius grown in the Almaden mining district (Ciudad Real, Spain), one of the most Hg-contaminated sites in the world. Soils of the Almaden mining district, and specifically from the Almadenejos zone, are highly contaminated, with some zones having values above 4,000 μg Hg g~(-1) soil. Although soils hare an extremely high concentration of mercury, generally less than 2% is available for plants, as is shown by various soil extractions simulating bioavailability. In plants, Hg concentration increases depending on the content of Hg in soils. In addition, Hg levels in roots are higher than in aerial parts, which is a strategy of plants for protecting their more sensitive aerial parts from the deleterious effects of metal stress. The total content of phytochelatins (PCs) and their complexes are directly related with the amount of mercury in soils. These findings highlight the important role of thiol compounds and their metal complexes in capturing and fixing Hg from soils, giving plants the capacity to deal with the heavy metal toxicity of polluted soils.
机译：为了评估植物对汞胁迫的反应，使用HPLC和安培检测法分析了Almaden矿区（西班牙雷阿尔城）生长的芦笋样品中的谷胱甘肽，植物螯合素及其汞络合物，该样品是西班牙汞污染最严重的地点之一世界。 Almaden采矿区的土壤，特别是Almadenejos地区的土壤，受到高度污染，有些地区的土壤价值超过4,000μgHg g〜（-1）。尽管土壤中汞的浓度非常高，但通常可用于植物的汞含量不到2％，正如各种模拟生物利用度的土壤提取所显示的那样。在植物中，Hg的浓度根据土壤中Hg的含量而增加。此外，根中的汞含量高于地上部分，这是植物保护其较敏感的地上部分免受金属胁迫有害影响的一种策略。植物螯合蛋白（PCs）及其配合物的总含量与土壤中的汞含量直接相关。这些发现凸显了硫醇化合物及其金属配合物在从土壤中捕获和固定汞中的重要作用，使植物有能力应对污染土壤的重金属毒性。

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  • 来源
    《Environmental Science & Technology》 |2014年第11期|6256-6263|共8页
  • 作者

    Angela Dago; Inmaculada Gonzalez; Cristina Arino; Alba Martinez-Coronado; Pablo Higueras; Jose Manuel Diaz-Cruz; Miquel Esteban;

  • 作者单位

    Departament de Quimica Analitica, Facultat de Quimica, Universitat de Barcelona, Marti i Franques, 1-11, 08028 Barcelona, Barcelona, Spain;

    Departament de Quimica Analitica, Facultat de Quimica, Universitat de Barcelona, Marti i Franques, 1-11, 08028 Barcelona, Barcelona, Spain;

    Departament de Quimica Analitica, Facultat de Quimica, Universitat de Barcelona, Marti i Franques, 1-11, 08028 Barcelona, Barcelona, Spain;

    Instituto de Geologia Aplicada, Escuela de Ingenieria Minera e Industrial de Almaden, Universidad de Castilla-La Mancha, Plaza M. Meca 1, 13400 Almaden, Ciudad Real, Spain;

    Instituto de Geologia Aplicada, Escuela de Ingenieria Minera e Industrial de Almaden, Universidad de Castilla-La Mancha, Plaza M. Meca 1, 13400 Almaden, Ciudad Real, Spain;

    Departament de Quimica Analitica, Facultat de Quimica, Universitat de Barcelona, Marti i Franques, 1-11, 08028 Barcelona, Barcelona, Spain;

    Departament de Quimica Analitica, Facultat de Quimica, Universitat de Barcelona, Marti i Franques, 1-11, 08028 Barcelona, Barcelona, Spain;

  • 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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