水杨酸诱导马铃薯疮痂病抗性的生理机制研究  

Physiological Mechanism of Salicylic Acid Induced Resistance to Common Scab of Potato

作　　者：汤晓莉[1] 薛红芬[1] 邓国宾[1] 杨明挚[1] 王燕云 陈小兰[1] 

机构地区：[1]云南大学生命科学学院植物科学研究所,云南昆明650091 [2]昆明益薯科技开发有限公司,云南昆明650091

出　　处：《西南农业学报》2010年第6期1851-1854,共4页Southwest China Journal of Agricultural Sciences

基　　金：云南省自然科学基金(2007C001M);国家自然科学基金(30960036)

摘　　要：以感病品种夏波蒂为材料,研究外源水杨酸(SA)在温室马铃薯种薯生产中,对种薯疮痂病的感病指数和植株生长的影响。通过分析植株叶片过氧化物酶、PAL活性、叶绿素含量、可溶性蛋白含量等多种生理指标的变化,探索诱导抗性的生理基础。结果表明,外源SA能显著降低种薯感病率;同时矮化植株,抑制地上部分生长,增强叶片叶绿素和类胡萝卜素合成。通过诱导抗氧化酶系活力的提高,SA能有效降低叶片中超氧自由基和MDA的含量,增强植株对疮痂病的系统抗性。Effect of salicylic acid（SA） on the resistance of sensitive potato variety shepody to common scab was studied in this paper.To elucidate the physiological mechanism of resistance induced by SA,the contents of soluble protein and chlorophyll and the activities of anti-oxygen enzymes were analyzed.The results showed that SA could effectively inhibit the infection rate of seedlings,increase the contents of soluble protein for 25×10-6 SA,superoxide radical and MDA of leaves,and promote the activities of anti-oxygen enzymes.SA could induce the system resistance of potato and increase its ability of resistance to common scab.

关 键 词：马铃薯 疮痂病 水杨酸 诱导抗病性 

分 类 号：S435.31[农业科学—农业昆虫与害虫防治]