期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 21, 期 11, 页码 1598-1606出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(08)62461-4
关键词
cadmium; lead; Chinese cabbage; antioxidative enzyme; malondialdehyde; soluble protein; proline
资金
- National Hi-Tech Research and Development Program (863) of China [2006AA06Z386]
- Liaoning Natural Science Foundation [20072018]
- Ministry of Education, People's Republic of China [707011]
- Sino-Russion Joint Research Center on Natural Resources and Eco-Environmental Sciences
- Chinese Academy of Sciences
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.
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