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Fatty acid ethyl esters (FAEE) are key target for wine industry to diversify its production towards fruity flavor. The microbial community and functional enzymes governing FAEE formation during Chinese rice wine (Huangjiu) brewing were investigated in current study. Physicochemical characteristics and FAEE displayed distinct phased changes, which fluctuated sharply in initial fermentation and then leveling off gently. Except for reducing sugar, other factors and FAEE showed strong positive correlations with the dominant microorganisms. Based on metagenomic analysis, Saccharomyces cerevisiae and lactic acid bacteria (LAB) were dominant in production of oxidoreductase, transferase, and isomerase, which significantly contributing to FAEE synthesis. Besides, phosphoglycerate mutase, pyruvate decarboxylase, fatty-acyl-CoA synthase, and trans-2-enoyl-CoA were crucial enzymes for the synthesis of FAEE precursors, with S. cerevisiae making substantial contributions. Microbe-mediated metabolic pathways elucidated that FAEE was mainly synthesized via ethanol and fatty acylCoA (C <= 16) under lipase and alcohol acyltransferase through S. cerevisiae during Huangjiu brewing. The most abundant LAB mainly influenced FAEE via pyruvate metabolism and esterase synthesis. Co-occurrence analysis highlighted the importance of amino acids for FAEE formation, especially lysine. The findings provide insights into optimizing FAEE production for enhanced flavor quality of alcoholic beverages.
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LWT-FOOD SCIENCE AND TECHNOLOGY
ISSN: 0023-6438
Year: 2024
Volume: 198
6 . 0 0 0
JCR@2023
Cited Count:
WoS CC Cited Count: 2
SCOPUS Cited Count: 2
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 3
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