The uptake of Cs and Sr from soil to radish (Raphanus sativus L.)- potential for phytoextraction and remediation of contaminated soils
The uptake of Cs and Sr from soil to radish (Raphanus sativus L.)- potential for phytoextraction and remediation of contaminated soils
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DOI：
10.1016/j.jenvrad.2012.01.028
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发表时间：
2012-08-01
影响因子：
2.3
通讯作者：
Luo, Xuegang
中科院分区：
文献类型：
--
作者：
Wang, Dan;Wen, Fangping;Luo, Xuegang
研究了油菜在室外盆栽土壤栽培过程中对Cs-133和Sr-88的吸收。培养30 d和60 d后，测定植株体内Cs-133、Sr-88的分布、积累及抗氧化反应。结果表明，当土壤中Sr-88或Cs-133的浓度在2.5 ~ 40 mg kg（-1）之间时，土壤中Sr-88和Cs-133的浓度相同时，萝卜对Sr-88的吸收能力远高于对Cs-133的吸收能力。Sr-88累积量最高为239.18 mu g g(-1) dw，其余Cs-133累积量最高为151.74 mu g g(-1) dw（土壤中Sr-88浓度为40 mg kg(-1)）， Sr-88累积量最低为131.03 mu g g(-1) dw，其余Cs-133累积量最低为12.85 mu g g(-1) dw（土壤中Sr-88浓度为5 mg kg(-1)）。Sr-88和Cs-133的TF值分别为1.16 ~ 1.72和0.24 ~ 0.60。高浓度Sr-88对植物总生物量影响不大，因此萝卜是锶污染土壤理想的植物修复植物之一。Sr-88胁迫下的MDA含量高于Cs-133胁迫，POD和CAT活性低于Cs-133胁迫，是萝卜耐Sr-88胁迫的重要生理原因。(C) 2012 Elsevier Ltd.版权所有。
The Cs-133 and Sr-88 uptake by plant Raphanus sativus L was studied during cultivation in outdoor potted-soil. The distribution, accumulation of Cs-133, Sr-88 and the antioxidant responses in plants were measured after 30 and 60 days of cultivation. The results showed that the uptake capacity of radish for Sr-88 was far higher than that for Cs-133 when the concentration of Sr-88 was as the same as that of Cs-133 in the soil (The concentration of Sr-88 or Cs-133 in the soil was from 2.5 mg kg(-1) to 40 mg kg(-1)). The highest Sr-88 accumulation was 239.18 mu g g(-1) dw, otherwise, the highest Cs-133 accumulation was 151.74 mu g g(-1) dw (The concentration of Sr-88 in the soil was 40 mg kg(-1)), and the lowest Sr-88 accumulation was 131.03 mu g g(-1) dw, otherwise, the lowest Cs-133 accumulation was 12.85 mu g g(-1) dw (The concentration of Sr-88 in the soil is 5 mg kg(-1)). The Sr-88 and Cs-133 TF values were 1.16-1.72 and 0.24-0.60, respectively. There was little influence of high concentration of Sr-88 on the total biomass of plants, so the radish is one of the ideal phytoremediation plant for Sr polluted soils. The important physiological reasons that radish had good tolerance to Sr-88 stress were that the MDA content was higher under the Sr-88 stress than that under the Cs-133 stress, and the activities of POD and CAT were lower under the Sr-88 stress than that under Cs-133 stress. (C) 2012 Elsevier Ltd. All rights reserved.