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作 者 ：闻方平;王丹;*;徐长合;徐凤亭;张志伟;张晓雪

期 刊 ：植物研究 2009年 29卷 5期 页码：592-596

关键词：133Cs；88Sr；Helianthus annuus L.；uptake；distribution；phytoremediation；

Keywords:133Cs, 88Sr, Helianthus annuus L., uptake, distribution, phytoremediation,

摘 要 ：通过盆栽试验研究了向日葵(Helianthus annuus L.)对土壤中不同处理浓度¹³³Cs和⁸⁸Sr的吸收，以及¹³³Cs和⁸⁸Sr在向日葵不同部位的分布。结果表明：随着处理浓度的增加，植物中¹³³Cs或⁸⁸Sr的含量增加。同一处理浓度下，⁸⁸Sr含量约比¹³³Cs含量高一个数量级。¹³³Cs和⁸⁸Sr在植物不同部位分布不同。根部中¹³³Cs含量高于植物的其他部位（茎、叶、花）。不同于¹³³Cs在植物中的分布，⁸⁸Sr除在根中的分布外，主要转运到了叶片。¹³³Cs和⁸⁸Sr在向日葵体内的分布与目前对放射性¹³⁷Cs和⁹⁰Sr的研究结果相似，所以¹³³Cs和⁸⁸Sr可分别预测¹³⁷Cs和⁹⁰Sr的运转。向日葵是治理大面积低放核素污染土壤的较佳植物种类。

Abstract:The uptake and distribution of stable ¹³³Cs and ⁸⁸Sr in sunflower (Helianthus annuus L.) were studied by pot experiments. The results showed that the content of ¹³³Cs or ⁸⁸Sr in leaf increased with the increasing soil concentration of each element. The ⁸⁸Sr content in sunflower leaf was generally one order of magnitude higher than that of ¹³³Cs in each same treatment level. The ¹³³Cs and ⁸⁸Sr were unevenly distributed in the different organs. The ¹³³Cs concentration was higher in roots than in other plant organs (stems, leaves, flowers). Contrary to the distribution of ¹³³Cs in plant, ⁸⁸Sr, except for roots, were mainly translocated to leaves. The distribution of cesium and strontium are agreed with the results of present research on radioactive ¹³⁷Cs and ⁹⁰Sr, ¹³³Cs and ⁸⁸Sr could be useful to understand and predict the long-term movements of ¹³⁷Cs and ⁹⁰Sr, respectively. Sunflower is the acceptable plants for phytoremediation to the low-level radioactive soil.

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