Changes in Microbial Community Structure of Chilled Chicken during A Partially Frozen Storage
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Abstract:
In order to reveal the changing trend of the microbial communities in chilled chicken during a partially frozen storage, and to provide a theoretical basis for partially frozen preservation, 16S RNA high-throughput sequencing technology was used to analyze the changes of microbial community structure of the chilled chicken during a partially frozen storage at -3 ℃. The results showed that Shannon index decreased, Simpson index increased, and microbial diversity decreased; The Ace index and Chao1 index first decreased, then increased with the storage time, and reached the peak value at the 4th day of storage then gradually decreased. At the phylum level, the dominant microorganisms of the chilled chicken during the storage were Proteobacteria, Firmicutes, Bacteroidetes, Actinobacteriota and Chloroflexi. The relative abundance of Proteobacteria increased with the extension of storage time, whilst the other Phyla decreased. At the genus level, the dominant taxa of chilled chickens were Pseudomonas, Acinetobacter, Shewanella and Psychrobactera. With the extension of storage time, the relative abundance of Pseudomonas increased, and the relative abundance of Acinetobacter, Shewanella or Psychrophilic decreased. At the 28 th day of the storage, Pseudomonas was the most abundant, with The relative abundance of other bacteria accounting for less than 1%, respectively. Accordingly, Pseudomonas is the dominant spoilage bacteria of chilled chickens during the partially frozen storage.
