Research on Quorum Sensing Signal Molecules of Pseudomonas spp.Isolated from Food
- VernacularTitle:食源假单胞菌群体感应信号分子的研究
- Author:
Guo-Hong QI
;
Ming-Sheng DONG
;
- Publication Type:Journal Article
- Keywords:
Pseudomonas;
N-acyl-homoserine lactones;
Quorum sensing
- From:
Microbiology
1992;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Three Gram-negative bacteria from commercial fresh fish were identified as Pseudomonas sp.,an important food spoilage bacteria, on the basis of 16S rDNA sequences.N-aeyl-homoserine lactones (AHLs) were the important quorum sensing molecules and regulated the expression of many characteristics in a cell-density-dependent manner in Gram-negative bacteria.The AHL biosensor detection revealed that three isolates produced AHLs molecules and strains FML05-1 and FML05-2 produced two types of AHLs at least and the main signal mole- cules were N-3-oxo-octanoyl-homoserine lactone(N-3-oxo-C_8-AHL).ALso the amount of AHL in FML05-2 reached to the maximum at 12h throughout growth.This was first study of quorum sensing signal molecule AHLs produced by the pseudomonas from food and layed the foun- dation for new strategies of food preservation based on interfering in quorum sensing of spoilage bacteria.
