Enhancement of microbial safety and shelf life of salmon fillets by Lactiplantibacillus plantarum 299 V fermented in pomelo (Citrus maxima) peel extract
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Abstract
This study demonstrated the selective support of pomelo (Citrus maxima) peel extract (PPE) on Lactiplantibacillus plantarum 299 V growth, of which the resultant enhanced microbial safety and shelf life of salmon fillets. Incorporating PPE fermented with L. plantarum 299 V for 48 h (FPPE-48h) into alginate coating inhibited both the spiked Listeria monocytogenes and the spoilage - causing bacteria (psychotrophic bacteria, Enterobacteriaceae, Pseudomonas spp.) on salmon fillets during the 4-day chilled storage, resulting in 1–1.5 log CFU/g lower bacterial counts (P < 0.05). FPPE-48h effectively suppressed biogenic amine-producing bacteria, and remarkably retarded the accumulation of putrescine, cadaverine, histamine, and tyramine (P < 0.05). Last, the key antimicrobial substances generated during the late stage of PPE fermentation were profiled using non-target ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS) analysis. This study exemplifies a successful approach of fermenting probiotic utilizing food by-products/food waste to enhance the safety and shelf life of ready-to-eat foods.
期刊介绍：
Food packaging is crucial for preserving food integrity throughout the distribution chain. It safeguards against contamination by physical, chemical, and biological agents, ensuring the safety and quality of processed foods. The evolution of novel food packaging, including modified atmosphere and active packaging, has extended shelf life, enhancing convenience for consumers. Shelf life, the duration a perishable item remains suitable for sale, use, or consumption, is intricately linked with food packaging, emphasizing its role in maintaining product quality and safety.
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