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首页> 外文期刊>Chemosphere >Effect of DTPA on Cd solubility in soil - Accumulation and subsequent toxicity to lettuce
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Effect of DTPA on Cd solubility in soil - Accumulation and subsequent toxicity to lettuce

机译：DTPA对Cd在土壤中的溶解度的影响-生菜的积累及其后续毒性

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摘要

In a controlled environment experiment, using Cd spiked soil, lettuce plants were grown under a range of DTPA levels and were subsequently harvested to determine levels of phytoaccumulation. Cadmium phy-toaccumulation significantly increased with increasing soil Cd level (P<0.05) but unexpectedly decreased with increasing DTPA levels, despite the fact that solubility of Cd was increased in the soil. Cadmium translocation (from root to shoot) increased after DTPA application. Lettuce growth was inhibited by both Cd and DTPA (at and above 10 and 500 mg kg~(-1) respectively), as a result of higher Cd mobility and subsequent toxicity which was caused by DTPA higher dosages. Metal solubility in the soil (ranged between 2.8 and 26.5 mg kg~(-1)) was found to be significantly higher (P<0.01) as compared to control with increasing DTPA levels even after 3 months of DTPA application. Cadmium tissue concentration in all DTPA treatments was less than in the corresponding control treatment, indicating a negative effect of DTPA application on Cd uptake. In conclusion, lettuce was an unsuitable plant species for Cd accumulation, at least when associated with a DTPA chelator.
机译：在受控环境实验中，使用掺Cd的土壤，将莴苣植物在一定的DTPA水平下生长，然后收获以确定植物的累积水平。尽管土壤中Cd的溶解度增加，但镉的累积量随土壤Cd含量的增加而显着增加（P <0.05），但随着DTPA含量的增加而出乎意料地降低。施用DTPA后，镉的转运（从根到芽）增加。 Cd和DTPA（分别在10和500 mg kg〜（-1）以及以上时）都抑制了莴苣的生长，这是由于更高的DTPA剂量导致Cd迁移率更高和随后的毒性所致。发现即使在施用DTPA 3个月后，土壤中的金属溶解度（介于2.8和26.5 mg kg〜（-1）之间）与对照相比也显着更高（P <0.01）。所有DTPA处理中的镉组织浓度均低于相应的对照处理，表明DTPA施用对Cd吸收具有负面影响。总之，至少当与DTPA螯合剂结合使用时，生菜才是不适合Cd积累的植物。

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  • 来源
    《Chemosphere》 |2013年第6期|1805-1810|共6页
  • 作者

    Faisal Mehmood; Audil Rashid; Tariq Mahmood; Lorna Dawson;

  • 作者单位

    Department of Environmental Sciences, PMAS Arid Agriculture University, Rawalpindi, Pakistan;

    Department of Environmental Sciences, PMAS Arid Agriculture University, Rawalpindi, Pakistan;

    Department of Environmental Sciences, PMAS Arid Agriculture University, Rawalpindi, Pakistan;

    Environmental and Biochemical Sciences Group, The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cadmium; DTPA; lettuce; phytoaccumulation; chelators;

    机译：镉;DTPA;生菜;植物积累螯合剂;

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