Lactobacillus plantarum strain and application thereof

Abstract

The invention relates to a lactobacillus plantarum strain of which the preservation number is CGMCC No.3166, which can be enriched in a modified MRS liquid culture medium. The lactobacillus plantarum strain is a white colony on an MRS solid culture medium, is straight, short-chained, Gram-positive and atrichous, has homofermentation, does not generate gas when fermenting glucose, generates acetic acid and lactic acid when fermenting ribose, and does not reduce nitrite. In application, the strain is activated and propagated and thalli are collected to form a fermenting agent which can inhibit the growth of amine producing bacteria in the fermenting production of meat products and generate biogenic amine oxidase which oxidizes and degrades tyramine, phenylethylamine, tryptamine and histamine. The invention has the advantages that the lactobacillus plantarum has strong growing ability, the fermenting agent has simple preparation technology and can effectively inhibit the growth and propagation of enterobacteria in the fermenting production of meat products and control the generation of biogenic amine, the generated biogenic amine oxidase can oxidize and degrade the contents of tyramine, phenylethylamine, tryptamine and histamine, and the lactobacillus plantarum strain as the fermenting agent for producing the fermented meat products can effectively reduce the accumulation of the biogenic amine.

Description

technical field

[0001] The invention discloses an excellent lactic acid bacterium and its application, belonging to the field of biotechnology. Background technique

[0002] Biogenic amines are a class of nitrogen-containing aliphatic, aromatic or heterocyclic organic compounds. There are mainly tyramine, histamine, putrescine, cadaverine, phenethylamine, tryptamine, spermine and spermidine. When it accumulates in a relatively high amount in the human body, it will produce toxicity, such as: the expansion of external blood vessels leads to high blood pressure and headache, and the contraction of intestinal smooth muscle causes abdominal cramps, diarrhea and vomiting, etc., and even life-threatening.

[0003] Among the 8 common biogenic amines in food, spermine and spermidine are brought from the raw materials. Other biogenic amines are produced by the decarboxylation of amino acids catalyzed by amino acid decarboxylase produced by microorganisms, and mainly exist in ferment...

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