西瓜枯萎病菌致病力与镰刀菌酸和β-1,4葡萄糖苷酶活性的关系研究  

Study on the Relationship between the Fusaric Acid, β Glucoseidase Activity and the Pathogenicity of Fusarium oxysporum f.sp. niveum on Watermelon

作　　者：王纯利[1] 王冬梅[1] 黄炜[1] 黄常福[1] 

机构地区：[1]新疆农业大学环境系,乌鲁木齐830052

出　　处：《新疆农业大学学报》2000年第1期1-6,共6页Journal of Xinjiang Agricultural University

基　　金：国家自然科学基金资助项目! (3930 0 0 85)

摘　　要：镰刀菌酸是枯萎病菌产生的一种非寄主特异性致病毒素。β 葡萄糖苷酶在枯萎病病程中起着降解细胞壁纤维素破坏植物细胞组织的作用。为了探索西瓜枯萎病菌的镰刀菌酸产量和β 1,4 葡萄糖苷酶活性与致病力的关系 ,本试验测定了 2 8个采自新疆的菌株 ,发现其镰刀菌酸的产量极不稳定 ,且与致病力强弱无关 ,而 β 1。The production of fusaric acid (5 n butyl picolinic acid) and glucosidase activity in 28 isolates of Fusarium oxysporum f.sp. niveum collected in Xinjiang and their pathogenicity against watermelon were tested. A positive correlation(r=0.836) was found between the β glucosidase activity of F. oxysporum f.sp. niveum cultured in Armstrong's medium and the pathogenicity as expressed in the wilt rate of watermelon seedlings. There was no clear relationship between the production of fusaric acid and the physiological races and the virulence of this fungus. It was suggested that pathogenesis of fusarium wilt depended not only on the pathotoxins it produced but also on its cellulolytic enzyme activities.

关 键 词：西瓜 枯萎病菌 致病力 镰刀菌酸 Β-葡萄糖苷酶 

分 类 号：S436.5[农业科学—农业昆虫与害虫防治]