Control Efficacy and Antifungal Mechanism of Bacillus Cereus Strain JK14 against Wheat Take-all Disease  

蜡样芽孢杆菌JK14对小麦全蚀病的防治及其抑病机理（英文）

作　　者：韩艳霞[1] 胡斌杰[1] 王宫南[1] 

机构地区：[1]开封大学化学工程学院

出　　处：《Agricultural Science & Technology》2008年第1期70-74,共5页农业科学与技术（英文版）

摘　　要：[Objective] Study on control efficacy and inhibitory effect of Bacillus cereus strain JK14^·against wheat take-all disease, investigating its antifungal mechanism. [Method] B. cereus JK14^· was isolated from soil in the rhizosphere of wheat, inhibitory effects of whose nutrient solution form against Gaeumannomyces graminis var tritici strains 9862 and 9812 were measured in laboratory and then for its antifungal mechanism. The strain JK14^· with rifampicin and wheat take-all disease resistance was screened by increasing concentration of the two substrates, and colonization of JK14^·was studied. [Result] In pot experiment, the control effects of JK14^·, against 9862 and 9812 are 63% and 59%, respectively, which are higher than that of chemical fungicides, with 55% and 51% , respectively. JK14^· could deform mycelium and causes degradation of cell wall. And there are also dynamic change of JK14^· in root system. JK14^· on seed could extend to root along with seed germination and rooting, but per unit tissue mycelium number decreased gradually. [Conclusion] The results indicate some control efficacy of B. cereus strain JK14^· against wheat take-all disease.目前国内外研究较多的小麦全蚀病菌拮抗微生物是荧光假单胞菌（Pseudomonas fluorescens）。枯草芽孢杆菌用于防治植物病害国内外已有较多研究，但是对于小麦全蚀病的防治还鲜见报道。该研究利用从小麦根际土壤中分离到的1株蜡样芽孢菌，研究该菌株对小麦全蚀病菌的抑制作用及防治效果，并对其作用机制进行了初步探讨。

关 键 词：Bacillus cereus Antagonistic effect Control efficacy Wheat take-all disease 

分 类 号：S435.121[农业科学—农业昆虫与害虫防治]