3种防御酶在水稻抗稻曲病中的活性变化  

Activities of three defensive enzymes in rice resistant to the false smut

作　　者：李小娟[1] 刘二明[1] 谭小平[2] 肖启明[1] 刘年喜[2] 王金辉[2] 

机构地区：[1]湖南农业大学生物安全科学技术学院,长沙410128 [2]湖南省植保植检站,长沙410005

出　　处：《植物保护》2010年第1期91-94,共4页Plant Protection

基　　金：湖南省重点科技攻关项目(05xk1005)

摘　　要：不同水稻品种对稻曲病抗性存在明显差异。本研究选用12个不同抗、感病水稻品种，在抽穗前7～10d，用注射法接种稻曲病菌分生孢子悬浮液。结果表明，在抗病品种中苯丙氨酸解氨酶（PAL）、过氧化物酶（POD）和多酚氧化酶（PPO）3种酶活性接种后迅速提高，变化幅度较大；而感病品种的酶活性在接种后缓慢增加，变化幅度小。由此说明，这3种防御酶与水稻抗稻曲病有一定的关系。There is different resistance in rice varieties against the false smut. PAL, POD and PPO activities of 12 cultivars with different resistant levels to rice false smut were studied. The results suggested that the activities of these enzymes quickly enhanced at 1 d, 3 d, 5 d and 7 d after inoculation by injecting conidia of the false smut fungus at 7-10 d before heading in the resistant cultivars, but slower increase in the susceptible cultivars, and also showed that there was correlations between the cultivar resistance to the disease and the three enzymes.

关 键 词：水稻 稻曲病 防御酶 

分 类 号：S435.111.2[农业科学—农业昆虫与害虫防治] S435.111.46[农业科学—植物保护]