摘要
研究冷却肉中假单胞菌的黏附能力及金银花提取物的降黏附效果。结果表明:从15份市售冷却肉中分离得到46株假单胞菌,经16S rDNA结合VITEK 2系统鉴定为恶臭假单胞菌22株,占47.8%;荧光假单胞菌10株,占21.7%;铜绿假单胞菌6株,占13.0%;浅黄假单胞菌8株,占17.4%;33株(71.7%)假单胞菌具有黏附能力,具有强黏附能力的菌株占17.4%,其中恶臭假单胞菌数量最多;金银花提取物能够降低4种假单胞菌的黏附能力,且对恶臭假单胞菌5-3和铜绿假单胞菌5-1作用效果更强,作用效果与金银花提取物质量浓度有关;金银花提取物质量浓度高于最小抑菌质量浓度(minimum inhibitory concentration,MIC)时,主要通过抑制菌体生长、减少胞外多糖产生而降低假单胞菌的黏附能力;金银花提取物质量浓度低于MIC时,主要通过溶解菌体胞外多糖、增强通透性、降低均匀度而降低假单胞菌的黏附能力。
The adhesion ability of Pseudomonas strains from chilled pork and the inhibitory effect of Flos Lonicerae Japonicae extract on it was analyzed in this study.A total of 46 strains of Pseudomonas strains were isolated from 15 commercial chilled pork samples,including 22 strains of Pseudomonas putida(47.8%),10 strains of Pseudomonas fluorescens(21.7%),6 strains of Pseudomonas aeruginosa(13.0%),and 8 strains of Pseudomonas luteola(17.4%),as identified by 16S rDNA sequence analysis and VITEK 2 system.In total 33(71.7%)of them were found to have adhesion ability,17.4%of which had strong adhesion ability,mostly Pseudomonas putida.Flos Lonicerae Japonicae extract could reduce the adhesion ability of the four Pseudomonas species,and had stronger effect on P.putida 5-3 and P.aeruginosa 5-1 in a concentration-dependent manner.At concentrations higher than the minimum inhibitory concentration(MIC),it excerted its effect mainly by inhibiting the growth of bacteria and reducing the production of extracellular polysaccharides.At concentrations lower than the MIC,its excerted its effect mainly by dissolving extracellular polysaccharides,consequently increasing the membrane permeability and reducing uniformity.
作者
王琳
李宇轩
范维
李贺楠
高晓月
陈淑敏
WANG Lin;LI Yuxuan;FAN Wei;LI Henan;GAO Xiaoyue;CHEN Shumin(China Meat Research Center,Beijing Academy of Food Science,Beijing 100068,China)
出处
《肉类研究》
北大核心
2020年第2期20-26,共7页
Meat Research
关键词
冷却肉
假单胞菌
黏附能力
金银花提取物
chilled pork
Pseudomonas
adhesion ability
Flos Lonicerae Japonicae extract
