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Stable isotope fractionation during uptake and translocation of cadmium by tolerant Ricinus communis and hyperaccumulator Solarium nigrum as influenced by EDTA

机译:EDTA对宽容的蓖麻和高积累性日光浴室吸收和转运镉过程中的同位素稳定分级分离

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摘要

The isotopic fractionation could contribute to understanding the Cd accumulation mechanisms in plant species. However, there are few of systematical investigations with regards to the Cd isotope fractionation in hyperaccumulator plants. The Cd tolerant Ricinus communis and hyperaccumulator Solanum nigrum were cultivated in nutrient solutions with varying Cd and EDTA concentrations. Cd isotope ratios were determined in the solution, root, stem and leaf. The two investigated plants were systematically enriched in light isotopes relative to their solutions (Delta Cd-114/110(plant-solution)= -0.64 parts per thousand to -0.29 parts per thousand for R. communis and -0.84 parts per thousand to -031 parts per thousand for S. nigrum). Cd isotopes were markedly fractionated among the plant tissues. For both plant species, an enrichment in light Cd isotopes from solution to root was noted, followed by a slight depletion in light Cd isotopes from root to shoot. Noticeably, the chelation process has caused lighter Cd isotope enrichment in the root of R. communis and S. nigrum. Further, the good fits between Delta Cd-114/110(root-plant) and In F-root (or between Delta Cd-114/110(shoot-plant) and In F-shoot) indicate that Cd isotopic signatures can be used to study Cd transportation during the metabolic process of plants. This study suggests that knowledge of the Cd isotope ratios could also provide new tool for identifying the Cd-avoiding crop cultivars. (C) 2018 Elsevier Ltd. All rights reserved.
机译:同位素分馏可有助于了解植物中Cd的积累机制。然而,关于高蓄积植物中镉同位素分级的系统研究很少。在具有不同Cd和EDTA浓度的营养液中培养耐Cd的蓖麻(Ricinus communis)和高积累性茄(Solanum nigrum)。测定溶液,根,茎和叶中的镉同位素比。相对于其溶液,两种被调查植物均富含系统中的轻同位素(Cd-114 / 110(植物溶液)= -0.64千份至-0.29千份,雷公根,-0.84千份至-黑色链球菌为031千分之1)。镉同位素在植物组织中明显分离。对于这两种植物,都注意到从溶液到根的轻Cd同位素富集,然后从根到芽的轻Cd同位素略有枯竭。值得注意的是,螯合过程已导致雷公沙门氏菌和黑曲霉根中的Cd同位素富集度降低。此外,在Delta Cd-114 / 110(根植物)和In F根之间(或在Delta Cd-114 / 110(枝形植物)和In F-根之间)的良好拟合表明可以使用Cd同位素签名研究植物代谢过程中的镉运输。这项研究表明,对Cd同位素比率的了解也可以为鉴定避免Cd作物品种提供新的工具。 (C)2018 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Environmental Pollution》 |2018年第5期|634-644|共11页
  • 作者单位

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China;

    Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, Peoples R China;

    Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, Peoples R China;

    Chinese Acad Sci, Inst Geochem, Guiyang, Guizhou, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cd; Isotope fractionation; Ricinus communis; Solanum nigrum; EDTA;

    机译:镉;同位素分馏;蓖麻;黑茄;EDTA;
  • 入库时间 2022-08-17 13:25:46

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