Bacillus Subtilis Probiotics is a kind of Bacillus, which is located in the center or slightly partial of the cell. The cell does not expand after spore formation. It grows and reproduces rapidly. The surface of the colony is rough, opaque, dirty white or yellowish. When it grows in liquid medium, it often forms wrinkles. It is an aerobic bacterium.
Protein, various sugars and starch can be used to decompose tryptophan to form indole. It is widely used in genetic research. The synthetic pathway and regulatory mechanism of purine nucleotides of this bacterium are clear. It is widely distributed in soil and rotten organic matter, and is easy to reproduce in the soaking juice of withered grass, so it is named.
Some strains are α- Important producing bacteria of amylase and neutral protease; Some strains have strong nucleotide degrading enzyme system, so they are often used as parent strains for breeding nucleoside producing strains or strains for preparing 5 '- nucleotidase.
Main Function
1. Active substances such as subtilisin, polymyxin, nystatin and Brevibacterium peptide produced during the growth of Bacillus subtilis have obvious inhibitory effect on pathogenic bacteria or conditional pathogenic bacteria of endogenous infection.
2. Bacillus subtilis rapidly consumes free oxygen in the intestine, causing intestinal hypoxia, promoting the growth of beneficial anaerobic bacteria and indirectly inhibiting the growth of other pathogenic bacteria.
3. Stimulate the growth and development of animal (human) immune organs, activate T and B lymphocytes, improve immunoglobulin and antibody levels, enhance cellular and humoral immune functions, and improve group immunity.
4. Self synthesis of Bacillus subtilis α- Amylase, protease, lipase, cellulase and other enzymes play a role in the digestive tract together with digestive enzymes in animals (human body).
5. It can synthesize vitamins B1, B2, B6, niacin and other B vitamins, and improve the activity of interferon and macrophages in animals (human body).
6. Bacillus subtilis has good stability and oxidation resistance in spore state by spore promotion and microencapsulation treatment of special bacteria; Extrusion resistance; High temperature resistance, long-term high temperature resistance of 60 ° C, and can survive for 20 minutes at 120 ° C; Resistant to acid and alkali, it can maintain activity in acidic gastric environment, and can resist the attack of saliva and bile. It is a living bacterium that can reach 100% of the intestines and intestines.
Scope of application
Aquaculture
Bacillus subtilis has a strong inhibitory effect on harmful microorganisms such as Vibrio, Escherichia coli and baculovirus in aquaculture. It can secrete a large number of chitinases, decompose toxic and harmful substances in the aquaculture pond, purify water quality, decompose residual bait, feces and organic matter in the pond, and has a strong role in cleaning small garbage particles in water. Bacillus subtilis is also widely used in feed. It has strong protease, lipase and amylase activities, can promote the degradation of nutrients in feed, and make aquatic animals absorb and utilize feed more fully.
Bacillus subtilis can reduce the occurrence of shrimp diseases and greatly increase the yield of shrimp, so as to improve economic benefits, biological environmental protection, stimulate the development of immune organs of aquatic animals and enhance body immunity; Reduce the occurrence of shrimp diseases and significantly improve the yield of shrimp, so as to improve economic benefits, purify water quality, no pollution and no residue.
Plant disease resistance
Bacillus subtilis successfully colonizes the rhizosphere, surface or body of plants, competes with pathogens for nutrition around plants, secretes antibacterial substances to inhibit the growth of pathogens, and induces plant defense system to resist the invasion of pathogens, so as to achieve the purpose of biological control. Bacillus subtilis can mainly inhibit a variety of plant diseases caused by plant pathogens such as filamentous fungi. The Bacillus subtilis strains isolated from rhizosphere soil, root surface, plant and leaf of crops have antagonistic effects on many fungal and bacterial diseases of different crops. Such as rice sheath blight, rice blast, Wheat Sheath Blight and bean root rot in food crops. Tomato leaf disease, Fusarium wilt, cucumber fusarium wilt, downy mildew, eggplant gray mold and powdery mildew, Pepper Blight, etc. Bacillus subtilis can also control a variety of diseases of postharvest fruits, such as apple mold heart disease, citrus Penicillium disease, nectarine brown rot, strawberry gray mold and powdery mildew, banana fusarium wilt, crown rot, anthrax, apple pear green mold, black spot, ulcer and Jinhua pear fruit rot. In addition, Bacillus subtilis also has a good control effect on poplar canker, rot, tree black spot and anthrax, tea ring spot, tobacco anthrax, black shank, scab, root rot, cotton bacterial wilt and Fusarium wilt.
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