Screening and Safety Study of Antimicrobial Substance Producing Strains in Traditional Soybean Paste in Northeast China
The objective of this study was to isolate and identify microorganisms capable of producing antimicrobial com-pounds from Northeast China soybean paste and to analyse their antimicrobial capacity.The results showed that a total of 44 strains with antibacterial activity were isolated,mainly Bacillus spp.Of these,Bacillus velezensis R2 was identified as capable of inhibiting the growth of six foodborne pathogenic bacteria,with a broad spectrum of bacterial inhibition.Additionally,non-ribosomal lipopeptides encoding bacillomycin D,fengycin,flagellin,iturin A,bacilysin,surfactin,and the protein class TasA were amplified from B.velezensis R2.The functional,phenotypic and safety-related characteriza-tion of B.velezensis R2 revealed that it was non-hemolytic,sensitive to 10 antibiotics,and possessed protease,amy-lase,cellulase,and pectinase activities.This study aims to provide a reference for the high-value utilization of low-salt fermentation microbial resources of sauces.
NETL
NSTL
万方数据
