^(133)Cs和^(88)Sr在蚕豆苗中的蓄积及其辐射损伤效应  

Studies on accumulation of ^(133)Cs and ^(88)Sr in Vicia faba Linn and irradiation damage effect

作　　者：张晓雪[1] 王丹[1,2] 李卫锋[1] 徐长合[1] 钟钼芝[1] 

机构地区：[1]西南科技大学生命科学与工程学院,绵阳621010 [2]核废物与环境安全国防重点学科实验室,绵阳621010

出　　处：《辐射研究与辐射工艺学报》2010年第1期48-52,共5页Journal of Radiation Research and Radiation Processing

基　　金：西南科技大学重点项目核辐射环境下的生物稳定性与变异及其机理研究(No.07XJGZB05);西南科技大学青年基金科研项目(No.08zx315208zx3152)资助

摘　　要：通过水培试验研究了蚕豆苗对不同浓度133Cs和88Sr的蓄积及其辐射损伤效应。本实验利用原子吸收方法测定蚕豆苗对133Cs和88Sr的蓄积量,研究了133Cs和88Sr在蚕豆苗各部位的分布及对其生理影响。结果表明:在133Cs和88Sr所设不同浓度下,蚕豆苗地上部和根部的133Cs和88Sr蓄积量均随浓度梯度升高而增加,表现出根部含量>地上部含量,133Cs含量>88Sr含量。随着时间的推移,蚕豆苗对溶液中133Cs和88Sr蓄积量表现出先骤升后趋于平稳的趋势;随核素浓度的上升,根系活力均表现为先增强后减弱的趋势;蚕豆苗叶片中的丙二醛含量增加,叶片中丙二醛含量变化均较根系的大。88Sr处理组中的可溶性糖含量高于133Cs处理组。The different concentrations of 133Cs and 88Sr accumulated by Vicia faba Linn and its irradiation damage effect were studied during cultivation in hydroponic condition. The accumulation of 133Cs and 88Sr was determined by FAAS, the distribution in different organs of Vicia faba Linn and physiological effect of 133Cs and 88Sr were investigated. The results show that at low concentration level the 133Cs and S8Sr taken by above-ground and root of Viciafaba Linn increase with the increment of their initial concentration and the accumulation relationship of contents is roots〉above-grounds and 133Cs 〉88Sr. When the plantlets exposed to 133Cs or 88Sr, the acculnulated amounts increase rapidly at begin then increase slowly along with the cultured time. With the increment of initial concentration the root activities tend to increase at first and then decrease. It has been found that the MDA contents in leaves increase with the experimental time and are higher than that in root while the contents of soluble sugar of SSSr treated group are higher than that of 133Cs treated group.

关 键 词：蚕豆苗 铯 锶 蓄积 损伤效应 

分 类 号：X591[环境科学与工程—环境工程] Q948.116[生物学—植物学]