Affiliation:
1. South China University of Technology
2. Yangjiang Polytechnic
3. Yangtze Delta Region Institute of Tsinghua University
Abstract
Abstract
Low-frequency electric field (LFEF) is a potential adjuvant technology for low-temperature preservation that can stabilize the supercooling state while delaying corruption and extending the shelf life. Changes in microbial community composition was investigated in Penaeus vannamei treated with LFEF in combination with ice temperature for 11 days. LFEF treatment increased the abundance and diversity of microbial communities in Penaeus vannamei and better maintained the relative content of original bacteria (Ralstonia), which indicates that LFEF contributes to the improvement in the species diversity. The spoilage microorganisms of shripm samples stored at ice temperature for 11 days included Aliivibrio, Pseudoalteromonas, Photobacterium, Moritella and Psychrobacter, which were also positively correlated with TVB-N and pH. However, Pseudoalteromonas and Psychrobacter were dominant in LFEF-treated samples. According to the difference analysis, LFEF treatment leaded to smaller changes in microbial structure, and the results showed that LFEF can effectively inhibit Vibrionaceae. A Spearman correlation analysis showed that Ralstonia and Faecalibacterium were positively correlated with spoilage bacteria, which may provide a reference for the improvement of LFEF assisted preservation. In conclusion, LFEF as an auxiliary technology for low temperature preservation is a reliable and potential method for preserving the quality of aquatic products.
Publisher
Research Square Platform LLC
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