泡桐丛枝病诱导抗性机制的研究  

Study on Induced Resistance of Paulownia to Witches'Broom

作　　者：任国兰[1] 刘廷志[1] 时向阳[1] 田光合 张松山[1] 魏立栋 董西良 

机构地区：[1]河南农业大学,河南省林技站,郑州市林技站,荥阳县林科所

出　　处：《河南农业大学学报》1995年第4期378-381,共4页Journal of Henan Agricultural University

基　　金：河南省科委"八五"攻关项目

摘　　要：测定了根接和皮接诱导处理后泡桐苗木及５ａ生幼树过氧化物酶（ＰＯＤ）、多酚氧化酶（ＰＰＯ）和苯丙氨醚解氨酶（ＰＡＬ）总活性。结果表明，根接和皮接诱导处理的泡桐苗木和５ａ生幼树３种酶总活性都显著高于对照。泡桐幼树丛枝病发病率诱导处理后３种酶活性的变化与泡桐幼树的抗病能力有相关性，根接诱导后的３种酶总活性最高，幼树发病率和感病指数都为零；皮接诱导后３种酶活性次之，幼树发病率为４．７％，感病指数为１．４７；对照的３种酶活性最低，幼树发病率达５９．２％，感病指数为３３．５４。Paulownia seedlings were induced by inserting scion on stems ( stem insertscion)and splice graft on roots (root graft)with the diseased stem and root. The activityof Peroxidase (POD),Polypheneolo xidase (PPO) and Phynelalanine ammonia lyase(PAL)were determined respectively. The results showed that the enzyme activity of theinoculated seedlings and the fifth generation of it was increased more significantly thanthat of the ck's. The results of the inverstigation on the incidence of disease of young treesalso domonstrated that there was a relationship between the changes of the three kinds ofenzyme activity and the induced resistance of inoculated seedlings : the ezymes acfivity ofroot graft seedlings was the highest of all(the incidence of disease and the index of diseaseare both zero ) , that of the stem inserts scion seedlings follovved the second (the rate is4.7%and the index of disease is 1. 47),that of the ck's was the lowest (the rate is 59.2%and the index of disease is 33.5)。

关 键 词：泡桐 丛枝病 诱导 酶活性 抗病性 

分 类 号：S763.724.3[农业科学—森林保护学] S792.430.4[农业科学—林学]