The invention discloses a multi-purpose method of
serratia marcescens strains, and belongs to the technical field of
fermentation engineering. The components of a
fermentation culture medium are adjusted, and
metabolism products of a
serratia marcescens SDSPY136 strain are respectively 2-Keto-D-
gluconic acid and prodigiosins, so that multiple purposes of the
serratia marcescens SDSPY136 strain arerealized. In the step (2), the content of the 2-Keto-D-
gluconic acid in
fermentation liquid is very high, and byproducts are very few, so that in a 2KGA fermentation culture medium, the specificity of the 2-Keto-D-
gluconic acid produced by
metabolism of the serratia marcescens SDSPY136 strain is very high, and the purification is convenient. In the step (3), the content of
prodigiosin in the fermentation liquid is very high, and byproducts are very few, so that in the
prodigiosin fermentation culture medium, the specificity of the
prodigiosin produced by
metabolism of the serratia marcescensSDSPY136 strain is very high, and the purification is convenient.