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Acyl-homoserine-lactones receptor LuxR of involved in the development of microbiota and spoilage of refrigerated shrimp.

J Food Sci Technol; 55(7): 2795-2800, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30042596
Numerous bacterial species utilize quorum sensing molecules acyl-homoserine-lactones (AHLs) to communicate, however, crosstalk often complicates the dynamics and behaviors of mixed populations. In this study, we developed a mutant of wild type SA03 (WT SA03), and aimed to investigate the role of LuxR (AHLs receptor) involved in the spoilage of refrigerated shrimp ( ) by inoculating WT SA03 and mutant of SA03 ( SA03), respectively. The results indicated the maximum growth rate of total viable bacteria in shrimp inoculated with SA03 was 73.34% lower than that of WT SA03. The lag time of total bacteria in shrimp treated with SA03 were 87.6 h, significantly longer than that of WT SA03. Meanwhile, the total volatile basic nitrogen concentrations of shrimp treated with WT SA03 were significantly higher than that of SA03 after 2 days of storage, which were in agreement with the decrease of the content of AHLs of the shrimp. The results indicated might utilize AHLs produced by other bacteria and accelerate the shrimp spoilage process through LuxR receptor system.