玉米苗期受镰刀菌侵染后几种防御酶活性的变化  

Study on the Change of Bioactivity of Several Defense Enzymes of Corn after Infected with Root Rot Fungi at Seedling Stage

作　　者：刘玉瑛[1] 石洁[1] 魏利民[2] 

机构地区：[1]河北省农科院植物保护研究所,保定071000 [2]保定职业技术学院,保定071005

出　　处：《河北农业科学》2002年第3期1-4,共4页Journal of Hebei Agricultural Sciences

摘　　要：玉米苗期人工接种镰刀菌后,对抗性不同的玉米品系多酚氧化酶(PPO)、过氧化物酶(PO)、苯丙氨酸解氨酶(PAL)酶活性的测定,初步明确了不同抗性玉米品系的PPO、PO、PAL酶活性在发病过程中的变化。感病品系在接种12h PP0酶活性均降低,抗性品系的PPO酶在24h内均增强:抗病品系在接种24h PO酶活性有一个增强过程,感病品系的酶活性减弱:接种后,抗、感玉米品系的PAL酶活性变化没有明显规律。Activities of the three defense enzymes, PPO,PO and PAL,in plant were determined after inoculated with seedling root rot. The change of activities of PPO, PO and PAL in Corn with different resistance were clarified. The activities of the PPO of the susceptible varieties were lower than that of the CK at 12 hours after inoculation. The activities of the PPO of the high resistant verieties were increased within 24 hours. The activities of the PO of the high resistance varieties experience an elevated process within 24 hours after infection. On the other hand, the activities of the PO of the susceptible varieties were declined. However, there was no obvious change for the activities of PAL of both the resistant varieties and the susceptible varieties.

关 键 词：玉米 苗期 镰刀菌侵染 防御酶活性 

分 类 号：S435.13[农业科学—农业昆虫与害虫防治]