若干种化合物钝化交链孢酸的研究  

THE STUDY ON SOME COMPOUNDS INACTIVATING ALTERNARIC ACID

作　　者：李树正[1] 岳东霞[1] 曾强[1] 张素华[1] 杨昭[1] 张志铭[2] 

机构地区：[1]南开大学元素有机化学研究所,天津300071 [2]河北农业大学

出　　处：《植物保护学报》1997年第3期273-277,共5页Journal of Plant Protection

基　　金：天津市自然科学基金

摘　　要：作者分离并提纯了马铃薯和番茄早疫病菌(Alternaria solani)的致病因子交链孢酸。在查明对番茄具有致病性的基础上,研究了多种化合物对交链孢酸的钝化作用。结果表明,供试的氨基酸对交链孢酸的植物毒性没有影响,而K_2HPO_4、KH_2PO_4、KMnO_4、FeSO_4、MnSO_4和柠檬酸铁等化合物均能减轻其植物毒性。这些化合物对A.solani的孢子萌发及菌丝生长没有影响,却能特异性地钝化交链孢酸。这种钝化作用与浓度有关,浓度愈高,钝化作用愈强烈。各种钝化物对番茄早疫病在离体叶片及植株上的防治效果分别为55.7％～75.1％和55.3％～65.8％。Alternaric acid, a pathogenic factor of early blight disease of potato and tomato, has been isolated and purified. After proved its phytotoxicity to tomato, we studied some compounds inactivating it. The results showed that the tested amino acids had no effect on phytotoxicity of alternaric acid, otherwise, K2HPO4,KH2PO4,KMnO4, FeSO4,FeCl3,MnSO4 and ferric citrate can reduce its phytotoxicity. These compounds have no effect on spores germination and hyphae growth of Alternaria solani ,but they can specifically inactivate alteraric acid,and the inactivation has relation to its concentration, the higher its concentration, the stronger its inactivation. The control effects of the compounds on early blight disease of tomato were 55. 7% - 75. 1% and 55. 3% -65. 8% on detached leaves and plants,respectively.

关 键 词：交链孢酸 番茄 早疫病 钝化毒素 解毒剂 

分 类 号：S482.2[农业科学—农药学] S436.412.1[农业科学—植物保护]