Joint effects of cadmium and lead on seedlings of four Chinese cabbage cultivars in northeastern China  

作　　者：XU Zhiqiang 

机构地区：[1]Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China [2]Graduate University of the Chinese Academy of Sciences, Beijing 100049, China [3]Key Laboratory of Pollution Processes and Environmental Criteria at Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China

出　　处：《Journal of Environmental Sciences》2009年第11期1598-1606,共9页环境科学学报（英文版）

基　　金：supported by the National Hi-Tech Research and Development Program (863) of China(No. 2006AA06Z386);the Liaoning Natural Science Foundation (No. 20072018);the Ministry of Education, People’s Republic of China for financial support as a grand fostering project (No.707011);the Sino-Russion Joint Research Center on Natural Resources and Eco-Environmental Sciences,Chinese Academy of Sciences for its partial financialsupport

摘　　要：In northeastern China, large area of vegetable land has been simultaneously polluted by cadmium （Cd） and lead （Pb）. Joint effects of Cd and Pb on Chinese cabbage （Brassica pekinensis L.） were investigated using the seed germination and sand culture method. Four Chinese cabbage cultivars including Kangbingjinchun （KB）, Dongyangchunxia （DY）, Qinglvwang （QL） and Qiangshi （QS） from Shenyang in northeastern China were adopted in this study. The results showed that there were positive linear relationships between the inhibitory rate of biomass, root and shoot elongation and the concentrations of Cd and Pb. In particular, root elongation was more sensitive to joint stress of Cd and Pb. The activity of superoxide dismutase and the content of malondialdehyde （MDA）, soluble protein （SP） and proline （PRO） changed significantly with increasing exposure concentration of Cd and Pb. The decrement in the activity of antioxidative enzymes, the content of SP and accumulation of MDA were relatively low in KB and QS. PRO played an important role in resisting Cd and Pb stress.In northeastern China, large area of vegetable land has been simultaneously polluted by cadmium （Cd） and lead （Pb）. Joint effects of Cd and Pb on Chinese cabbage （Brassica pekinensis L.） were investigated using the seed germination and sand culture method. Four Chinese cabbage cultivars including Kangbingjinchun （KB）, Dongyangchunxia （DY）, Qinglvwang （QL） and Qiangshi （QS） from Shenyang in northeastern China were adopted in this study. The results showed that there were positive linear relationships between the inhibitory rate of biomass, root and shoot elongation and the concentrations of Cd and Pb. In particular, root elongation was more sensitive to joint stress of Cd and Pb. The activity of superoxide dismutase and the content of malondialdehyde （MDA）, soluble protein （SP） and proline （PRO） changed significantly with increasing exposure concentration of Cd and Pb. The decrement in the activity of antioxidative enzymes, the content of SP and accumulation of MDA were relatively low in KB and QS. PRO played an important role in resisting Cd and Pb stress.

关 键 词：CADMIUM LEAD Chinese cabbage antioxidative enzyme MALONDIALDEHYDE soluble protein  proline 

分 类 号：S634.1[农业科学—蔬菜学] X171[农业科学—园艺学]