禾顶囊壳对小麦初生根和次生根的侵染性研究  

Infectivity of Gaeumannomyces graminis var. tritici on the Seminal and Secondary Roots of Wheat

作　　者：左广胜 郑彦周 李雪梅 刘常宏[3] 

机构地区：[1]北京中龙创科技有限公司,北京100071 [2]河南省新野县农业技术推广中心,河南新野473500 [3]南京大学生命科学学院,南京210093

出　　处：《中国农学通报》2009年第19期209-212,共4页Chinese Agricultural Science Bulletin

基　　金：北京市丰台区科技型中小企业创新基金项目"克服重茬栽培障碍生物有机肥的开发与应用"(2007CXJJ20)

摘　　要：禾顶囊壳小麦变种是侵染小麦根部引起全蚀病害的致病菌,采用室内盆栽接种方法,研究了全蚀病菌——禾顶囊壳小麦变种对小麦初生根与次生根侵染性的差异。结果表明,小麦初生根易感全蚀病菌,是禾顶囊壳小麦变种的主要侵染部位,而次生根相对抗病,其发病轻重与次生根的生理年龄和小麦品种的抗病性有关,小麦8793-8较76120抗禾顶囊壳小麦变种的侵染。研究结果对认识禾顶囊壳小麦变种的致病机理以及利用抗病品种控制该病的危害具有重要意义。The infectivity of the take-all causing pathogen Gaeumannomyces graminis var. tritici （Ggt） on the seminal and secondary roots of wheat was determined with pot assay in glass house. The results showed that the seminal roots of wheat were highly susceptible to the infection of Ggt. However, the secondary roots were relatively resistant, and the degree of severity was associated with the age of roots and the resistance of wheat cuhivars to the take-all disease. In comparison to 76120, 8793-8 was a cuhivar resistant to the infection of Ggt, which indicated that application of wheat disease-resistant varieties might be a successful way for controlling ＂take-all＂ disease.

关 键 词：小麦 初生根 次生根 禾顶囊壳 全蚀病 

分 类 号：S432.1[农业科学—植物病理学]