薇甘菊提取物对稻瘟病菌的抑菌活性  

Antifungal activity of Mikania micrantha extract against Magnaporthe oxyzae

作　　者：杨态娇 张威 罗建梅 李青 聂闪闪 廖仕梅 符滔 闫晓慧 YANG Taijiao;ZHANG Wei;LUO Jianmei;LI Qing;NIE Shanshan;LIAO Shimei;FU Tao;YAN Xiaohui(Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province/College of Forestry,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]云南省高校森林灾害预警控制重点实验室/西南林业大学林学院,云南昆明650224

出　　处：《华南农业大学学报》2025年第1期81-88,共8页Journal of South China Agricultural University

基　　金：云南省教育厅科学研究基金(2023Y0726);国家自然科学基金(32160378);云南省高层次人才项目(YN-WR-QNBJ-2018-300);西南林业大学博士科研启动经费(111712)。

摘　　要：【目的】以入侵物种薇甘菊Mikania micrantha为材料,探究其不同提取物及组分对稻瘟病菌Magnaporthe oxyzae的抑菌活性。【方法】以稻瘟病菌为供试病原菌,采用生长速率法对采自云南德宏的薇甘菊提取物进行室内抑菌活性测定,并通过柱层析对提取物的抑菌活性组分进行追踪。【结果】在初筛质量浓度为1 mg/mL时,薇甘菊乙酸乙酯萃取物对稻瘟病菌有较好的抑菌活性,抑菌率为49.84%。对薇甘菊乙酸乙酯萃取物的14个柱层析组分进行抑菌活性追踪,组分Fr_(5)、Fr_(6)、Fr_(12)、Fr_(13)抑菌效果显著,在接种后第9天的EC_(50)分别为1.691、2.134、0.865、0.818 mg/mL;4个组分均使菌丝质量减轻,MDA含量升高,菌丝形态畸变。【结论】本研究发现薇甘菊提取物对稻瘟病菌有较好的抑菌效果,为综合开发利用薇甘菊提供了新思路,也为稻瘟病菌的绿色防控提供了科学依据。Objective Mikania micrantha,an invasive species,was used as a material to investigate the antifungal activity of different extracts and components against Magnaporthe oxyzae.Method The antifungal activity of M.micrantha extract from Dehong of Yunnan Province was determined by growth rate method with M.oxyzae as the test pathogen,and the antifungal active components of the extract were traced by column chromatography.Result At the initial screening mass concentration of 1 mg/mL,M.micrantha ethyl acetate extract showed potent antifungal activity against M.oxyzae,with the inhibition ratio of 49.84%.The antifungal activity tracking of 14 column chromatography components of the ethyl acetate extract showed that the antifungal activities of Fr_(5),Fr_(6),Fr_(12) and Fr_(13) were significant,EC50 values on day 9 after inoculation were 1.691,2.134,0.865 and 0.818 mg/mL,respectively.All the four active components resulted in the reduction of mycelial mass,elevation of MDA content,aberration of mycelial morphology.Conclusion This study finds that M.micrantha can significantly inhibit M.oxyzae,which provides a new idea for comprehensive development and utilization of M.micrantha,and also provides a scientific basis for green control of M.oxyzae.

关 键 词：植物提取物 稻瘟病菌 薇甘菊 生长速率法 抑菌活性 

分 类 号：S435.11[农业科学—农业昆虫与害虫防治]