摘要
通过盆栽试验研究了向日葵(Helianthus annuusL.)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1。33Cs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1。33Cs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。
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, SSSr, except for roots, were mainly transloeated 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.
出处
《植物研究》
CAS
CSCD
北大核心
2009年第5期592-596,共5页
Bulletin of Botanical Research
基金
Supported by the Key Research of Southwest University of Science and Technology-"Biologic Stability and Mutation under the Radiate Environment and the Mechanism"(07XJGZB05)
Research Foundation of Southwest University of Science and Technology for youth(O8zx315208zx3152)
