甘蓝幼苗感染黑腐病后SOD、POD活性的变化

Change of Activity of SOD and POD in Cabbage Seedlings Inoculated with Black Rot

本试验选取高抗、抗病、耐病和感病4种不同抗病性级别的甘蓝材料各1份,进行黑腐病病原菌的接种,并测定幼苗的SOD、POD指标的变化,分析这些变化与其抗病性的关系。结果表明:幼苗体内SOD和POD活性变化均随时间的延长呈上升趋势,014号组合接种的与未接种的植株体内SOD、POD活性变化幅度大于其它3种材料,而对照品种接种的与未接种的植株体内SOD、POD活性变化幅度最小。说明受病原菌感染后,植株体内酶活性的变化程度可反映其抗病性强弱,而且抗病品种比感病品种保持了较高的酶活性。

Four materials of cabbage that belonged to high-resistant, resistant, tolerant and susceptible were inoculated with black rot in this study. Such physiological and biochemical indexes as the activity of SOD and POD were tested. The relation between changes of SOD and POD and resistance to black rot was studied. The results showed that for resistant materials and susceptible materials, the activity of SOD and POD in seedlings showed an increasing trend with the prolonging of time. The activity change range of SOD and POD in ＇NO. 014＇between inoculated materials and non-inoculated materials was higher than that of three other materials. The change range of＇ Qingfeng＇between inoculated materials and non-inoculated materials was the lowest. The change degree of enzyme in plants could reflect the resistance ability. Furthermore the ＇resistant＇ materials had higher enzyme activity than the ＇Susceptible＇ materials.