香蕉组培苗POD、PPO及SOD活性对银胁迫的反应

用0.1mg/mL硝酸银溶液处理香蕉组培苗,分别测定了多酚氧化酶(PPO)、过氧化物酶(POD)及超氧化物岐化酶(SOD)的活性。结果表明:在银胁迫下,香蕉组培苗的PPO、POD、SOD的活性明显增加(P<0 05或P<0 01),但随着胁迫时间的延长呈下降趋势且趋于稳定,这说明PPO、POD和SOD活性的提高与维持是植物耐受银胁迫的物质基础之一。

Reaction of activity of peroxidase, polyphenol oxidase and superoxide dismutase in tissue seedlings of banana to the stress of Ag

The activity of PPO,POD and SOD was examined after tissue seedlings of banana were treated with 0.1 mg/mL AgNO3. The results showed that the activity of PPO,POD and SOD obviously increased(P<0.05 or P<0.01)under Ag stress,but the activity submitted the tendency of drop and tended to steady with the stress time's prolonging. This indicated the raising and keeping of the activity of PPO,POD and SOD was one of the foundation of the tolerance to Ag stress.