The effect of NaCl stress on antioxidant enzymes activity in transgenic sweetpotato expressing CuZn superoxide dismutase and ascorbate peroxidase genes

摘要：

Antioxidant enzyme activities in transgenic sweetpotato (Ipomoea batatas L. cv. Yulmi) plants expressing both CuZn superoxide dismutase (CuZnSOD) and ascorbate peroxidase (APX) genes were evaluated under different concentrations of NaCl treatment. The result indicated that the levels of superoxide dismutase (SOD),ascorbate peroxidease (APX),peroxidase (POD) and catalase (CAT) activity in leaves of transgenic sweetpotato (TS) were always higher than non- transformed sweetpotato (NS) under NaCl stress. We observed that the antioxidant enzyme activities in TS leaves increased quickly below 100 mmol/L NaCl and reached the peak value at 100 mmol/L NaCl,then decreased slightly at 150 mmol/LNaCl;however those in NS showed slight or no increase below 100 mmol/L NaCl,and decreased sharply at 150 mmol/L NaCl,and the APX activity was decreased even at 100 mmol/L NaCl. These results indicate that sweetpotato over-expressing CuZnSOD-APX gene might efficiently tolerate the salt stress.

关键词： NaCl stress transgenic sweetpotato antioxidant enzyme

作者: Wang Xin Guo Xiaoming Li Qiang Ma Daifu Tang Zhonghou

作者单位: Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences,XuZhou,221121,China Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences,XuZhou,221121,China Xuzhou

会议类型: 国际会议

会议名称: China Xuzhou 4th International Sweetpotato Symposium & 4th China-Japan-Korea Workshop(中国徐州第四届国际甘薯学术研讨会暨第四届中日韩甘薯学术讨论会)

会议地点: 徐州

会议语种:英文

页码: 193-198

在线出版日期: 2010-11-27（万方平台首次上网日期，不代表论文的发表时间）