The invention belongs to the field of microorganisms, and particularly relates to a
gossypol degradation strain coming from
ruminant rumens and application thereof. The
gossypol degradation strain is collected in a common
microorganism center of the
microorganism culture preservation and management committee of Chinese on August 23, 2013; and the culture preservation number is CGMCC No.8069. According to the
gossypol degradation strain coming from
ruminant rumens and the application, gossypol serves as a unique
carbon source, the new strain with higher degradation activity to the gossypol is separated, screened, purified and cultivated from the
ruminant rumens; through morphology and molecular biological identification, the strain RBS is
Bacillus subtilis; and the homology between the
Bacillus subtilis and the
Bacillus tequilensis strain KM34 is 98%. The strain comes from the ruminant rumens of a
living body, the nondeterminacy of the
microorganism toxicology coming from soil or other natural environments is avoided, and a mice
toxicity test shows that
bacteria do not have
toxicity. The
liquid state fermentative gossypol degradation rate reaches 94.74%; after the
bacteria are used for fermenting
cottonseed meal, it is determined that the degradation rate of the free gossypol in the fermented
cottonseed meal approaches to 80% through liquid
chromatography (HPLC).