寄主诱导剂对大白菜幼苗抗软腐病的诱导效应研究

Inductive Effect Study of Host Inducers on Soft Rot Disease Resistance in Chinese Cabbage

利用寄主诱导剂处理大白菜幼苗,测定幼苗体内多酚氧化酶(PPO)与苯丙氨酸解氨酶(PAL)的活性,同时测定幼苗体内木质素和总酚含量。结果表明:大白菜幼苗体内PPO与PAL的活性均比对照明显提高(P<0.05),幼苗体内木质素和总酚含量也出现不同程度的累积。诱导剂处理能显著增强大白菜对软腐病的抗性,而且主要是通过提高幼苗体内与抗病性相关的酶的活性以及幼苗体内木质素和总酚含量来实现的。

Activity of PPO and PAL,content of lignin and total phenol were all measured in seedling of Chinese cabbage,which was treated by host inducers.The results showed that activity of PPO and PAL obviously raised（P0.05）;at the same time content of lignin and total phenol were accumulated in different extent.Resistance of Chinese cabbage treated by inducers on soft rot disease was enhanced,and the enhanced resistance was achieved by increasing activity of relative enzyme,content of lignin and total phenol in seedling of Chinese cabbage.