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《Journal of Anhui Agricultural Sciences》 2008-29
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Preliminary Studies on Antifungal Activity of Xanthium sibiricum and the Endophytic Fungi

QI Li-yan et al(Forest Station of Wuxi Agroforestry Bureau,Wuxi,Jiangsu 221000)  
[Objective]The study aimed to provide theoretical foundation of developing a new fungicide with high activity,low toxicity and low residual.[Method] Based on the plant growth rate and inhibition zone methods,the antifungal activity of extracts of every organ of Xanthium sibiricum,the fermentation liquid of endophytic fungi MG4-23,and the extract of mycelium were tested with six kinds of pathogenic fungi and three kinds of pathogenic bacteria respectively.[Result]The extract of every organ of X.sibiricum,the fermentation liquid of endophyic fungi MG4-23,and the extract of mycelium all had antifungal activities.The acetone extracts of X.sibiricum had stronger antifungal activities than the ethanol extracts of X.sibiricum.The extracts of leaf have the strongest antifungal activities against the fungi and bacteria.The inhibition rates of the six pathogenic fungi were all above 47.8%,and the inhibition diameters of the three pathogenic bacteria were all above 0.5 cm.The fermentation liquid of endophytic fungi also had strong activities against the fungi and bacteria.The inhibition rates of the six pathogenic fungi were all above 68.1%.The extracts of the root of X.sibiricum and the mycelium of endophyic fungi all had antifungal activities.[Conclusion]X.sibiricum and endophyic fungi MG4-23 had great value of development and utilization.
【Fund】: 科技部微生物资源平台项目(2005DKA2120721)
【CateGory Index】: S482.292
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