生态与农村环境学报2012，Vol.28Issue(1)：72-76,5.
麻疯树对铅胁迫的生理耐性研究
Physiological Tolerance of Jatropha curcas to Lead Stress
摘要
Abstract
To study effect of lead stress on growth, lead absorption and related physiological indexes of Jatropha curcas, a pot experiment was conducted with soils treated with the Pb concentration of 0, 200, 400, 800, 1 600, and 3 200 mg ? Kg-1 , separately. Results show that growth of J. Curcas was significantly inhibited when soil w ( Pb) was≥800 mg ? Kg-1. With increasing Pb concentration in the soil, the Pb contents in various parts of the plant increased, showing a decreasing order of root, leaf, and stem. And when soil w(Pb) was ≥ 800 mg ? Kg , the activities of antioxidant enzymes, I. E. Superoxide dismutase (SOD) , peroxidase (POD) and catalase (CAT) , and the contents of proline, soluble sugar, and acid thiol (SH) in the plant leaves were all increased significantly, however, the content of glutathione ( GSH) would show a sharp rise only when soil w ( Pb) reached up to 3 200 mg ? Kg-1 . With increasing Pb concentration in the soil, the content of soluble protein rose first and then declined, and peaked when soil w ( Pb) was at 400 rng ? Kg -1. The above-described changes in physiology of J. Curcas reduced Pb toxicity to the plant to a certain extent. Principal component analysis ( PCA) revealed that the result of clustering of the treatments of Pb stress accorded with the law of the changes in biomass and physiological indices of/, curcas. Among the physiological indices of J. Curcas, POD activity and soluble sugar content were major contributors to alleviating Pb toxicity to the plant. The findings of the research suggest that J. Curcas has great potential for phytoremedying lead polluted soils.关键词
麻疯树/铅胁迫/生理耐性/土壤修复/植物修复/主成分分析Key words
Jatropha curcas/ lead stress/ physiological tolerance/ soil remediation/ plant rehabilitation/ principle component analysis分类
资源环境引用本文复制引用
李清飞..麻疯树对铅胁迫的生理耐性研究[J].生态与农村环境学报,2012,28(1):72-76,5.基金项目
国家高技术研究发展计划重点项目(2007AA061001) （2007AA061001）
NFSC-广东联合基金(U0833004) （U0833004）
河南省科技厅项目(112102310431) （112102310431）
信阳师范学院博士科研启动基金 （）
