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Written Paper

Preliminary studies on antifungal activity of Xanthium sibiricum and the endophytic fungi  [2008]

Qi Liyan Liu Lili Yu Pingru Chen Fengmei

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Objective]The study was aimed to provide theoretical foundation for 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 organism of Xanthium sibiricum, the fermentation liquid of endophyic fungi MC4-23, 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 organism of Xanthium sibiricum, the fermentation liquid of endophyic fungi MC4-23, and the extract of mycelium all had antifungal activities. The acetone extracts of Xanthium sibiricum had stronger antifungal activities than the ethanol extracts of Xanthium sibiricum. The extracts of leaf have the strongest antifungal activities against fungi and bacteria. The inhibition rates of the six pathogenic fungi were all above 47.8%, and the inhibition diameter of the three pathogenic bacteria were all above 0.5 centimeter. The fermentation liquid of endophytic fungi also had strong activities against the fungi and bacteria. The inhibition rate of the six pathogenic fungi were all above 68.1%.The extracts of root of Xanthium sibiricum and the mycelium of endophyic fungi were all had antifungal activities. [Conclusion]Xanthium sibiricum and endophyic fungi MC4-23 had great value of development and utilization.

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Agricultural Science and Technology

ISSN : 1009-4229

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