硒对堇叶碎米荠SOD活性等生理特性的影响

Effect of Selenium on SOD Activity and Some Physiological Characteristics of Cardamine violifolia

研究结果表明，在20℃条件下，硒浓度≤24．0mg/L时，SOD、CAT、POD活性变化不大；晒浓度〉24．0mg/L时，POD活性有所寸高；硒浓度为30．0mg/L时，SOD活性有较大幅度的下降。4℃条件下，SOD、CAT活性较20℃时大幅下降；POD活性随硒浓度的增加而增加，在18．0mg/L浓度时达到最大值。常温下适量的硒可提高SOD、POD及CAT的活性，最适处理浓度为18.0～24．0mg/L。

The relation change between SOD, POD and CAT activities in leave of Cardamine violifolia was not obvious when the selenium content of 24.0 mg/L at 20 ℃condition, The POD activity raised when the selenium content of 〉 24.0 mg/L, but the SOD activity dropped at the content = 30.0 mg/L. At 4 ℃ condition, the SOD and CAT activity was degressive compared with 20℃. The POD activity increased with the increment of selenium content, reaching the most at selenium content = 18.0 mg/L. Appropriate selenium can enhance activity of SOD,POD and CAT at normal temperature and the best chroma was 18.0 - 24.0 mg/L.