链格孢菌毒素对紫茎泽兰的致病机理  

The pathogenic mechanism of toxin of Alternaria alternata (Fr.) Keissler to Eupatorium adenophorum Spreng.

作　　者：万佐玺[1] 朱晶晶[1] 强胜[1] 

机构地区：[1]南京农业大学杂草研究室,江苏南京210095

出　　处：《植物资源与环境学报》2001年第3期47-50,共4页Journal of Plant Resources and Environment

基　　金：高等学校博士点专项科研基金 (96 0 2 0 5 ) ;农业部九五高技术及基础研究项目 (0 2 0 3 0 3 1)资助

摘　　要：以叶圆片法分析链格孢菌〔Alternariaalternata (Fr.)Keissler〕毒素对紫茎泽兰 (EupatoriumadenophorumSpreng .)叶组织细胞膜透性、过氧化物酶 (POD)、抗坏血酸过氧化物酶 (APX)和过氧化氢酶 (CAT)活性以及丙二醛 (MDA)含量的影响 ,结果表明 ,链格孢菌毒素使紫茎泽兰叶组织细胞膜透性上升 ,Na+和K+渗漏量增加 ,膜脂过氧化加强 ,MDA含量上升 ;链格孢菌毒素处理的紫茎泽兰叶片中POD、APX和CAT的活性均较对照降低。Effects of toxin in Alternaria alternata (Fr.) Keissler on cell membrane permeability, MDA content and activities of POD, APX and CAT enzymes of Eupatorium adenophorum Spreng. were conducted by the method of excised leaf test. The results showed that toxin increased permeability of cell membrance, leakage of K\+\{+\}and Na\+\{+\}, over\|oxidation of cell membrane and content of MDA in E. adenophorum leaf tissue, but activities of POD, APX and CAT in treated leaves were lower than those in control leaves.

关 键 词：链格孢菌 毒素 紫茎泽兰 致病机理 杂草 生物防治 

分 类 号：S451.1[农业科学—植物保护]