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砷-硒交互作用对水稻吸收转运砷和硒的影响

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胡莹, 黄益宗, 刘云霞. 砷-硒交互作用对水稻吸收转运砷和硒的影响[J]. 环境化学, 2013, 32(6): 952-958. doi: 10.7524/j.issn.0254-6108.2013.06.005
引用本文: 胡莹, 黄益宗, 刘云霞. 砷-硒交互作用对水稻吸收转运砷和硒的影响[J]. 环境化学, 2013, 32(6): 952-958. doi: 10.7524/j.issn.0254-6108.2013.06.005
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HU Ying, HUANG Yizong, LIU Yunxia. Interactions between arsenic and selenium uptake and translocation in rice (Oryza sativa L.) seedlings[J]. Environmental Chemistry, 2013, 32(6): 952-958. doi: 10.7524/j.issn.0254-6108.2013.06.005
Citation: HU Ying, HUANG Yizong, LIU Yunxia. Interactions between arsenic and selenium uptake and translocation in rice (Oryza sativa L.) seedlings[J]. Environmental Chemistry, 2013, 32(6): 952-958. doi: 10.7524/j.issn.0254-6108.2013.06.005
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砷-硒交互作用对水稻吸收转运砷和硒的影响

  • 1.

    中国科学院生态环境研究中心, 北京, 100085

  • 基金项目:

    国家重金属污染治理专项"广西环江县大环江流域土壤重金属污染治理工程项目"

    国家水体污染控制与治理科技重大专项(2009ZX07212-001-05)资助.

Interactions between arsenic and selenium uptake and translocation in rice (Oryza sativa L.) seedlings

  • 1.

    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China

  • Fund Project:

  • 摘要: 采用溶液培养法,研究了两种形态无机As与四价Se交互作用对水稻吸收转运As和Se的影响.结果表明,不同形态As与Se交互作用对水稻吸收转运As和Se影响较大,Se(Ⅳ)显著地提高水稻根系而降低水稻茎叶对As的吸收积累.与对照处理相比,在1.0 μmol·L-1 As(Ⅲ)和As(Ⅴ)处理下添加1.0 μmol·L-1 Se(Ⅳ)分别导致水稻根系As含量提高59.5%和21.3%,而水稻茎叶As浓度减少10.4%和21.9%.As(Ⅲ)或As(Ⅴ)处理显著降低水稻茎叶对Se的吸收积累,但As(Ⅴ)处理对水稻根系积累Se没有影响.在1.0 μmol·L-1 Se(Ⅳ)处理下,添加1.0 μmol·L-1 As(Ⅲ)和1.0μmol·L-1 As(Ⅴ)导致水稻茎叶Se浓度分别比对照处理降低41.9%和30.3%.Se(Ⅳ)与As(Ⅲ)或As(Ⅴ)对水稻转运As、Se的能力具有交互拮抗作用.研究结果表明,在As污染农田中,可通过施用Se肥来提高植物的Se营养,降低植物对As的吸收积累,从而降低As对人体健康的危害.
    Abstract: Interactive effects between arsenic(As) and selenite(Se) on uptake and translocation of As and Se in rice seedlings were investigated in hydroponic culture. The results showed that the interaction between different As species and Se significantly influenced As and Se uptake and translocation in rice. Se(Ⅳ) significantly increased As concentration in roots but decreased it in shoots. Under 1.0 μmol·L-1 As(Ⅲ) or As(Ⅴ) treatment, supply of 1.0 μmol·L-1 Se(Ⅳ) increased As concentration in roots by 59.5% and 21.3%, respectively, compared with the As(Ⅲ) or As(Ⅴ) treatment alone, but the As concentration in shoots decreased by 10.4% and 21.9% respectively. Similarly, As(Ⅲ) or As(Ⅴ) significantly decreased Se concentration in shoots, but did not affect Se accumulation in roots. Under 1.0 μmol·L-1 Se(Ⅳ) treatment, Se concentration in shoots was declined by 41.9% and 30.3%, respectively, with supply of 1.0 μmol·L-1 As(Ⅲ) or As(Ⅴ). There was an antagonistic interaction between Se(Ⅳ) and As(Ⅲ) or As(Ⅴ) in rice plant. These results imply that supply of Se can inhibit As uptake and accumulation in plants, and therefore, reduce As hazards to human health.
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  • 收稿日期:  2012-09-27

砷-硒交互作用对水稻吸收转运砷和硒的影响

  • 1. 中国科学院生态环境研究中心, 北京, 100085
  • 收稿日期:  2012-09-27
基金项目:

国家重金属污染治理专项"广西环江县大环江流域土壤重金属污染治理工程项目"

国家水体污染控制与治理科技重大专项(2009ZX07212-001-05)资助.

摘要: 采用溶液培养法,研究了两种形态无机As与四价Se交互作用对水稻吸收转运As和Se的影响.结果表明,不同形态As与Se交互作用对水稻吸收转运As和Se影响较大,Se(Ⅳ)显著地提高水稻根系而降低水稻茎叶对As的吸收积累.与对照处理相比,在1.0 μmol·L-1 As(Ⅲ)和As(Ⅴ)处理下添加1.0 μmol·L-1 Se(Ⅳ)分别导致水稻根系As含量提高59.5%和21.3%,而水稻茎叶As浓度减少10.4%和21.9%.As(Ⅲ)或As(Ⅴ)处理显著降低水稻茎叶对Se的吸收积累,但As(Ⅴ)处理对水稻根系积累Se没有影响.在1.0 μmol·L-1 Se(Ⅳ)处理下,添加1.0 μmol·L-1 As(Ⅲ)和1.0μmol·L-1 As(Ⅴ)导致水稻茎叶Se浓度分别比对照处理降低41.9%和30.3%.Se(Ⅳ)与As(Ⅲ)或As(Ⅴ)对水稻转运As、Se的能力具有交互拮抗作用.研究结果表明,在As污染农田中,可通过施用Se肥来提高植物的Se营养,降低植物对As的吸收积累,从而降低As对人体健康的危害.

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