Unraveling the Physicochemical Properties and Bacterial Communities in Rabbit Meat during Chilled Storage

The freshness and bacterial communities of fresh and salted rabbit meat during 8 days of refrigerated storage at 4 °C were evaluated. The results showed that the addition of 2% salt significantly changed the color of meat, of which the lightness (L*), redness (a*), and yellowness (b*) were lower tha...

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Bibliographic Details
Main Authors: Zhoulin Wu, Maoqin Xu, Wei He, Xiaoyu Li, Chaoqing Qiu, Jiamin Zhang
Format: Article
Language:English
Published: MDPI AG 2024-02-01
Series:Foods
Subjects:
Online Access:https://www.mdpi.com/2304-8158/13/4/623
Description
Summary:The freshness and bacterial communities of fresh and salted rabbit meat during 8 days of refrigerated storage at 4 °C were evaluated. The results showed that the addition of 2% salt significantly changed the color of meat, of which the lightness (L*), redness (a*), and yellowness (b*) were lower than that of fresh meat over time. The pH of all samples increased during storage, and meat with salt addition had lower values in comparison to fresh samples over time. The total volatile base nitrogen (TVB-N) concentration increased rapidly in salt-treated meat but was significantly (<i>p</i> < 0.05) lower than that in meat without salt added before 6 days. Over time, the content of thiobarbituric acid reactive substances (TBARS) showed a progressive trend, but a rapid increase occurred in salted meat. High-throughput sequencing showed that the microflora of each sample had a positive trend in alpha diversity and a negative trend in beta diversity. Bacterial taxonomic analysis indicated that the initial microbial flora for chilled rabbit meat was dominated by <i>Shigaella</i>, <i>Bacteroides</i>, and <i>Lactococcus</i>, and the population of <i>Brochothrix</i> and <i>Psychrobacter</i> increased over time and became the dominant spoilage bacterium. In particular, the addition of salt significantly reduced the abundance of <i>Psychrobacter</i> and <i>Brochothrix</i>. These findings might provide valuable information regarding the quality monitoring of rabbit meat during chilled storage.
ISSN:2304-8158