摘要
从连云港海域潮间带所采的土样中分离到一株产高活性抗细菌物质的链霉菌LY-1。抗菌谱测定结果表明菌株LY-1发酵产物对枯草芽孢杆菌等5株革兰氏阳性菌,大肠杆菌等6株革兰氏阴性菌有显著拮抗作用。稳定性研究表明该菌所产抗细菌物质在121℃,pH1和pH12条件下抑菌活性均不变;紫外线照射也不影响其抑细菌活性。该抗菌产物对蜡样芽孢杆菌和大肠杆菌生长的抑制作用研究表明,该抗菌产物能够较好的抑制蜡样芽孢杆菌和大肠杆菌的生长繁殖。菌株LY-1所产抗菌物质在海产品及食品保鲜、生防及医药方面具有潜在的应用价值。
Marine Streptomyces sp.LY-1 solated from marine samples collected in the intel tidal zone of Lianyungang, was found to produce antibacterial substance which exhibited significant inhibitory effects on 5 Gram-positive bacteria and 6 Gram-negative bacteria. The results of stability studies of the antibacterial substance showed that it had very good stability at pH1 and pH12 under 121 ℃ or under ultraviolet treatment. Sensibility and inhibition effect of antibacterial substance produced by strain LY-1 to Bacillus cereus and Escherichia coli were studied. The results showed that Bacillus cereus and Escherichia coli were very sensitive to antibacterial substance. Antibacterial substance could strongly inhibit their growth-breeding. The potential use of substance produced by strain LY-1 in bio-control, marine products, food and medical application was predicted.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第23期314-317,共4页
Food Science
基金
江苏省淮海工学院自然科学研究项目(Z2007032)
江苏省淮海工学院科研启动项目(KQ07101)
关键词
海洋链霉菌LY-1
发酵产物
抗细菌活性
Marine Streptomyces sp. LY-1
fermentation product
antibacterial activity
