摘要
在确定4种防腐剂壳聚糖、山梨酸钾、脱氢乙酸钠和ε-聚赖氨酸对副溶血弧菌(Vibro parahaemolyticus)的最小抑菌浓度(minimum inhibitory concentration,MIC)的基础上,研究其对副溶血弧菌生物膜的抑制作用。采用结晶紫染色法测生物膜形成量,XTT法测生物膜代谢活性,硫酸-苯酚法测定生物膜中胞外多糖的分泌量。结果表明,壳聚糖的MIC最小,为1.25 mg/m L。4种防腐剂在MIC以及亚抑菌浓度条件下对副溶血弧菌生物膜均有明显的抑制作用,不仅抑制生物膜的形成,而且能显著降低细菌的代谢活性,减少胞外多糖的分泌,其中壳聚糖对副溶血弧菌生物膜的抑制作用最强。
In this study,we analyzed the minimum inhibitory concentrations(MICs)of four kinds of food preservatives(chitosan,potassium sorbate,sodium dehydroacetate andε-polylysine)for Vibro parahaemolyticus,and we then investigated their inhibitory effects on biofilm formation by V.parahaemolyticus.The crystal violet straining method was conducted to determine the amount of biofilm,and XTT reduction assay and phenol-sufuric acid method were used to detect the changes of metabolic activities and extracellular polysaccharide of biofilm,respectively.The results showed that the MIC of chitosan was the lowest,which was1.25mg/mL.At both MIC and sub-MIC,these four food preservatives could not only demonstrate a remarkable inhibitory effect on biofilm formation by V.parahaemolyticus,but also reduce the metabolic activity and the secretion of extracellular polysaccharides of cells in biofilms.Among these preservatives,the inhibitory effect of chitosan was the strongest.
作者
雷欢
谢婷
魏宇清
刘欢
钟青萍
LEI Huan;XIE Ting;WEI Yuqing;LIU Huan;ZHONG Qingping(College of Food Science, South China Agricultural University, Guangzhou 510642, China;The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2017年第7期6-10,共5页
Food Science
基金
国家自然科学基金面上项目(31271956)
关键词
副溶血弧菌
生物膜
防腐剂
抑制
Vibrio parahaemolyticus
biofilm
food preservatives
inhibition
