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首页> 外文期刊>Environmental toxicology and chemistry >SCREENING OF A NEW CADMIUM HYPERACCUMULATOR, GALINSOGA PARVIFLORA, FROM WINTER FARMLAND WEEDS USING THE ARTIFICIALLY HIGH SOIL CADMIUM CONCENTRATION METHOD
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SCREENING OF A NEW CADMIUM HYPERACCUMULATOR, GALINSOGA PARVIFLORA, FROM WINTER FARMLAND WEEDS USING THE ARTIFICIALLY HIGH SOIL CADMIUM CONCENTRATION METHOD

机译：使用人工高土壤镉浓度法从冬季农田杂草中筛选新型镉超富集剂GALINSOGA PARVIFLORA

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摘要

A new method, the artificially high soil cadmium (Cd) concentration method, was used to screen for Cd hyperaccumulators among winter farmland weeds. Galinsoga parviflora was the most promising remedial plant among 5 Cd accumulators or hyperaccumulators. In Cd concentration gradient experiments, as soil Cd concentration increased, root and shoot biomass decreased, and their Cd contents increased. In additional concentration gradient experiments, superoxide dismutase and peroxidase activities increased with soil Cd concentrations up to 75 mg kg~(-1), while expression of their isoenzymes strengthened. Catalase (CAT) activity declined and CAT isoenzyme expression weakened at soil Cd concentrations less than 50 mg kg~(-1). The maxima of Cd contents in shoots and roots were 137.63 mg kg~(-1) and 105.70 mg kg~(-1), respectively, at 100 mg kg~(-1) Cd in soil. The root and shoot bioconcentration factors exceeded 1.0, as did the translocation factor. In a field experiment, total extraction of Cd by shoots was 1.35 mg m~(-2) to 1.43 mg m~(-2) at soil Cd levels of 2.04 mg kg~(-1) to 2.89 mg kg~(-1). Therefore, the artificially high soil Cd concentration method was effective for screening Cd hyperaccumulators. Galinsoga parviflora is a Cd hyperaccumulator that could be used to efficiently remediate Cd-contaminated farmland soil.
机译：人工高土壤镉（Cd）富集的新方法被用来筛选冬季农田杂草中的镉超富集剂。 Galinsoga parviflora是5种Cd累积器或超累积器中最有希望的修复植物。在Cd浓度梯度实验中，随着土壤Cd浓度的增加，根和茎生物量减少，Cd含量增加。在另外的浓度梯度实验中，当土壤镉浓度达到75 mg kg〜（-1）时，超氧化物歧化酶和过氧化物酶的活性增加，同工酶的表达增强。土壤镉浓度低于50 mg kg〜（-1）时，过氧化氢酶（CAT）活性下降，CAT同工酶表达减弱。土壤中Cd为100 mg·kg·（-1）时，枝条和根部的Cd最大含量分别为137.63 mg·kg·（-1）和105.70 mg·kg·（-1）。根和茎生物浓度因子和转运因子均超过1.0。在田间试验中，当土壤Cd含量为2.04 mg kg〜（-1）至2.89 mg kg〜（-1）时，枝条中Cd的总提取量为1.35 mg m〜（-2）至1.43 mg m〜（-2）。 ）。因此，人为地增加土壤中Cd的浓度对筛选Cd超富集剂是有效的。 Galinsoga parviflora是一种Cd超富集剂，可用于有效修复受Cd污染的农田土壤。

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  • 来源
    《Environmental toxicology and chemistry》 |2014年第11期|2422-2428|共7页
  • 作者

    Lijin Lin; Qian Jin; Yingjie Liu; Bo Ning; Mingan Liao; Li Luo;

  • 作者单位

    College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan, China;

    College of Resource and Environment, Sichuan Agricultural University, Chengdu, Sichuan, China;

    College of Resource and Environment, Sichuan Agricultural University, Chengdu, Sichuan, China;

    College of Resource and Environment, Sichuan Agricultural University, Chengdu, Sichuan, China;

    College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan, China;

    College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan, 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

    Galinsoga parviflora; Screening method; Cadmium; Remediation; Hyperaccumulator;

    机译：Galinsoga parviflora;筛选方法;镉;补救措施;超蓄能器;

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