陕北沙漠土壤颉抗放线菌的生物活性及理化特性研究  

Studies on the Antimicrobial Activity of Actinomyces from Shanbei and the Physiological-biochemical Characteristics

作　　者：沈玲[1] 郭正彦[1] 魏少鹏[1] 龙建友[1] 刘伟[2] 吴文君[1] 

机构地区：[1]西北农林科技大学农药研究所,陕西杨凌712100 [2]农业部农药质量监督检验测试中心,西安710003

出　　处：《西北农业学报》2007年第1期59-63,共5页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家863高技术计划项目(2002AA245121)

摘　　要：笔者从采自陕北沙漠的沙土中分离出一株链霉菌A1。通过对其进行的包括形态、生理生化特性等方面的研究,初步确定其为链霉菌属(Streptomyces)。室内活性测定结果表明该菌株具有广谱、较强的抗真菌和细菌活性。盆栽试验中,A1菌株的发酵液对小麦白粉病的保护作用达到87.85%,治疗效果也达到81.19%。田间试验结果表明A1菌株的发酵液对黄瓜霜霉病的相对防治效果为78.97%,是一株具有广谱抗菌活性的潜力菌株。Strain A1 was isolated from sand in desert area of Shanbei, China. Based on the test results of morphology, physiology and biochemistry characteristics, we proposed it primarily as a Streptomycete. The results of fungicidal activity of fermentation products showed that Strain A1 had broad-spectrum and strong activity against pathogenic fungi and bacteria. The results of pot tests showed that the fermentation broths exhibited a protective efficacy of 87.85 % and a therapeutic efficacy of 81. 19 against Erusiphe graminis. The field tests results showed that the fermentation broth of strain A1 exhibited a relative efficacy of 78.97 % against Pseudoperonospora cubensis.

关 键 词：放线菌 颉抗 理化特性 

分 类 号：S476[农业科学—农业昆虫与害虫防治]