The variational rules of the activity of SOD and CAT of Egeria najas is coincident for all durations of exposure, at first the activity of SOD and CAT were increased, subsequently the activity of SOD and CAT were declined.

• 在Hg~(2+)处理的96h内，细叶蜈蚣草SOD和CAT活性变化规律基本是一致的，只是酶活性的相对大小有所变化，即细叶蜈蚣草SOD和CAT活性随Hg~(2+)增加先上升后下降。