High-activity lactobacillus plantarum N3117 as well as screening method and application thereof

Abstract

The invention discloses lactobacillus plantarum N3117. The lactobacillus plantarum N3117 is acid-resistant and bile-salt-resistant probiotic separated from a fermented dairy product in Inner Mongolia; the strain of the lactobacillus plantarum N3117 is preserved in China General Microbiological Culture Collection Center, and the preservation number is CGMCC NO.10133; the screened lactobacillus plantarum N3117 is sequentially subjected to tests including sample enrichment, separation, purification and the like, and the lactobacillus plantarum N3117 is screened out finally. The screened lactobacillus plantarum N3117 can be used for preparing yoghurt, sour milk beverages and probiotic powder preparations containing the lactobacillus plantarum N3117. The method is applicable to screening of the lactobacillus plantarum N3117 and the lactobacillus plantarum N3117 is applicable to preparation of functional dairy products and probiotic powder containing the lactobacillus plantarum N3117.

Description

technical field

[0001] The invention belongs to the field of microbial engineering, and relates to a plant lactobacillus, specifically a highly active plant lactobacillus (Lactobacillus plantarum) N3117, a screening method and application thereof. Background technique

[0002] Lactobacillus is one of the main beneficial bacteria in the normal intestinal flora of animals. It is an important health-promoting factor for animals. It can regulate the balance of intestinal flora, improve immunity, relieve lactose intolerance and inhibit the formation of tumor cells. , Promote digestion and absorption of nutrients, lower cholesterol levels, etc. However, the premise of its physiological function is to be able to tolerate the acidic and high bile salt environment of the upper digestive tract, and to have good adhesion properties.

[0003] Lactobacillus plantarum is a probiotic group in the human gastrointestinal tract. Its metabolism can produce organic acids, bacteriocins, hydroge...