Bacillus subtilis G8 strain showed a strong activity to inhibit the growth of some plant pathogenic fungi. The inhibition mechanism is producing antifungal protein. In this paper, fermentation medium and culture conditions of the strain were optimized. Subsequently, partial character and purification of antifungal protein were studied. All this lay a foundation for further study of characteristics and structure of antifungal protein, antifungal mechanism and genetic modification of strain.
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