土壤中 Cs 和 Sr 向萝卜（Raphanus sativus L.）的吸收 - 用于植物提取和受污染土壤修复的潜力。
The uptake of Cs and Sr from soil to radish (Raphanus sativus L.)- potential for phytoextraction and remediation of contaminated soils.
机构信息
College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, China.
出版信息
J Environ Radioact. 2012 Aug;110:78-83. doi: 10.1016/j.jenvrad.2012.01.028. Epub 2012 Mar 6.
The (133)Cs and (88)Sr uptake by plant Raphanus sativus L. was studied during cultivation in outdoor potted-soil. The distribution, accumulation of (133)Cs, (88)Sr 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 (88)Sr was far higher than that for (133)Cs when the concentration of (88)Sr was as the same as that of (133)Cs in the soil (The concentration of (88)Sr or (133)Cs in the soil was from 2.5 mg kg(-1) to 40 mg kg(-1)). The highest (88)Sr accumulation was 239.18 μg g(-1) dw, otherwise, the highest (133)Cs accumulation was 151.74 μg g(-1) dw (The concentration of (88)Sr in the soil was 40 mg kg(-1)), and the lowest (88)Sr accumulation was 131.03 μg g(-1) dw, otherwise, the lowest (133)Cs accumulation was 12.85 μg g(-1) dw (The concentration of (88)Sr in the soil is 5 mg kg(-1)). The (88)Sr and (133)Cs TF values were 1.16-1.72 and 0.24-0.60, respectively. There was little influence of high concentration of (88)Sr 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 (88)Sr stress were that the MDA content was higher under the (88)Sr stress than that under the (133)Cs stress, and the activities of POD and CAT were lower under the (88)Sr stress than that under (133)Cs stress.
在户外盆栽土壤中培养期间，研究了植物萝卜（Raphanus sativus L.）对（133）Cs 和（88）Sr 的吸收。在培养 30 和 60 天后，测量了（133）Cs、（88）Sr 在植物中的分布、积累以及抗氧化反应。结果表明，当土壤中（88）Sr 的浓度与（133）Cs 相同时，萝卜对（88）Sr 的吸收能力远高于（133）Cs（土壤中（88）Sr 或（133）Cs 的浓度为 2.5-40mgkg(-1)）。最高的（88）Sr 积累量为 239.18μg g(-1) dw，相反，最高的（133）Cs 积累量为 151.74μg g(-1) dw（土壤中（88）Sr 的浓度为 40mgkg(-1)），最低的（88）Sr 积累量为 131.03μg g(-1) dw，相反，最低的（133）Cs 积累量为 12.85μg g(-1) dw（土壤中（88）Sr 的浓度为 5mgkg(-1)）。（88）Sr 和（133）Cs 的 TF 值分别为 1.16-1.72 和 0.24-0.60。高浓度（88）Sr 对植物的总生物量几乎没有影响，因此萝卜是 Sr 污染土壤的理想植物修复植物之一。萝卜对（88）Sr 胁迫具有良好耐受性的重要生理原因是，在（88）Sr 胁迫下 MDA 含量高于（133）Cs 胁迫，而在（88）Sr 胁迫下 POD 和 CAT 的活性低于（133）Cs 胁迫。
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