Cadmium-Induced Ozidative Stress in Radish Seedlings

摘要：

While seedlings of Radish raised in increasing contents of Cd2+ in hydroponic system, increment in ratio of superoxide dismutase (SOD)/catalase (CAT) and levels of superoxide anion (O2 .-) and lipid peroxides was observed; 125 μmol·L-1 Cd2+ treatment resulted in a gradual elevation in SOD activity; while at Cd2+ level of 250 and 500 μmol·L-1 SOD activity considerably increased at first, then declined to even lower than that of the control. CAT activity showed enhancement in leaves whereas decrease in roots. Cd2+ induced an obvious elevation in GR activity in both roots and leaves. A marked elevation in GR activity suggests that ascorbate-glutathione (AsA–GsH) cycle may be activated to scavenge AOS and the synthesis of reduced glutathione (GSH) may be stimulated for subsequent synthesis of phytochelatins (PCs) to chelate Cd2+ directly.

关键词： cadmium hydroponic culture ozidative stress radish

作者: TANG Chunfang ZHANG Riqing WEN Shizhi LI Kelin

作者单位: College of Resources and Environment,Central South University of Forestry and Technology,Changsha 410004,Hunan,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)

会议地点: 上海

会议语种:英文

页码: 443-446

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）