【作者】 曾会才； 邬国良； 余凤玉； 李振华；

【Author】 ZENG Hui-Cai? WU Guo-liang YU Feng-Yu LI Zheng-Hua Supervisor: Vice Prof. Zeng Huicai (Department of Plant Protection, SCUTA, 571737, Danzhou, Hainan, China)

【机构】 中国热带农业科学院环境与植物保护研究所；

【摘要】 对放线菌LA5 菌株的抑菌谱进行了初步测定,结果表明:放线菌LA5 菌株对辣椒疫霉菌Phytophthoracapsici、稻瘟菌Pyricularia grisea、香蕉炭疽菌Colletotrichum musae、香蕉枯萎镰刀菌Fusarium oxysporumsp.cubense、香蕉黑星病菌Phyllosticta musarum 和芒果炭疽菌Colletotrichum gloeosporiodies 等6 种植物病原菌表现很强的抗菌活性,对茄子腐皮镰刀菌Fusarium solani 具有明显的抑效果;通过阳离子交换层析法对LA5 菌株产生的抗生素进行了分离纯化,获得了抗生素LA5 的结晶,理化性质测定结果表明,这种抗生素属水溶性、弱碱性抗生素,对光、热稳定,符合农药贮藏稳定性要求。更多还原

【Abstract】 The experiment of testing on antifungal spectrum of Actinomycetales strain LA5 was conducted. The results showed that actinomycetales strain LA5 had strong antagonistic action against Phytophthora capsici, Pyricularia grisea, Colletotrichum gloeosporioides, Fusarium oxysporum f. sp. Cubense, Colletotrichum musae and Phyllosticta musarum in carrot agar. The crystal of antibiotic LA5 was gained by the methods of Ion exchange chromatography combined with crystallization. The antibiotic LA5 can maintain antifungal activity in the conditions of neutral, weak alkaline, light and 54℃ for 15 days , respectively, that indicated antibiotic LA5 accord with stability requirement of pesticide.更多还原