Preparation method and application of 2-deoxyguanosine, guanosine and composition thereof

The invention discloses a preparation method and application of 2-deoxyguanosine, guanosine and a composition thereof, belongs to the technical field of prevention and treatment of pathogenic microorganisms, and particularly relates to application of 2-deoxyguanosine and guanosine to inhibition of vibrio parahaemolyticus in marine fish culture, application of 2-deoxyguanosine and guanosine to plant virus resistance, and application of 2-deoxyguanosine and guanosine to preparation of a composition of 2-deoxyguanosine and guanosine. The invention also discloses application of 2-deoxyguanosine and guanosine in increasing the content of 2 '-deoxyguanosine, guanosine and salicylic acid in plants. The invention provides a composition containing 2 '-deoxyguanosine and guanosine, and provides a method for extracting the 2'-deoxyguanosine and the guanosine from a paecilomyces variotii SJ1 thallus, and also provides a method for extracting the 2 '-deoxyguanosine and the guanosine from the paecilomyces variotii SJ1 thal