Application of pentagalloylglucose in preparation of reagent for culturing enterococcus faecalis

The invention provides application of pentagalloylglucose in preparation of a reagent for culturing enterococcus faecalis, and belongs to the technical field of probiotic culture. The pentagalloylglucose provided by the invention can be used for effectively increasing the abundance of Enterococcus in excrement of mice with colitis induced by DSS and the DNA (Deoxyribonucleic Acid) content of a main strain E.faecalis in the bacteria. Meanwhile, an in-vitro fermentation experiment also shows that the biomass of the strain can be remarkably improved by supplementing the PGG, and the growth of the probiotics E. faecalis can be remarkably promoted by intervening the PGG in an in-vivo and in-vitro experiment. Besides, a supernatant obtained after co-fermentation of the PGG and the E. faecalis not only can effectively reduce the occurrence of intestinal leakage of the nematodes and the generation of ROS, but also can protect the normal form of mitochondria and promote the expression of outer membrane protein, so tha