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Popular fermented golden pomfret (Trachinotus ovatus) is prepared via spontaneous fermentation; however, the mechanisms underlying the regulation of its flavor development remain unclear. This study shows the roles of the complex microbiota and the dynamic changes in microbial community and flavor compounds during fish fermentation. Single-molecule real-time sequencing and molecular networking analysis revealed the correlations among different microbial genera and the relationships between microbial taxa and volatile compounds. Mechanisms underlying flavor development were also elucidated via KEGG based functional annotations. Clostridium, Shewanella, and Staphylococcus were the dominant microbial genera. Forty-nine volatile compounds were detected in the fermented fish samples, with thirteen identified as characteristic volatile compounds (ROAV > 1). Volatile profiles resulted from the interactions among the microorganisms and derived enzymes, with the main metabolic pathways being amino acid biosynthesis/metabolism, carbon metabolism, and glycolysis/gluconeogenesis. This study demonstrated the approaches for distinguishing key microbiota associated with volatile compounds and monitoring the industrial production of high-quality fermented fish products.


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Insights into microbiota community dynamics and flavor development mechanism during golden pomfret (Trachinotus ovatus) fermentation based on single-molecule real-time sequencing and molecular networking analysis

Show Author's information Yueqi Wanga,b,dQian ChenaHuan Xianga,b,dDongxiao Sun-Waterhousea,cShengjun Chena,b,dYongqiang Zhaoa,b,dLaihao Lia,b,dYanyan Wua,b,d,( )
Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs of The People’s Republic of China, National R&D Center for Aquatic Product Processing, South China Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
School of Chemical Sciences, The University of Auckland, Auckland 92019, New Zealand
Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China

Peer review under responsibility of Tsinghua University Press.

Highlights

• Fermentation in golden pomfret shows varied microbiota and flavor changes over time.

• Clostridium, Shewanella, and Staphylococcus were the dominant genera detected.

• Thirteen compounds were identified as key flavor components in fermented golden pomfret.

• Amino acid metabolism, lipid metabolism and carbohydrate metabolism were the main metabolic pathway.

• The mechanisms associated with the flavor formation were illuminated.

Abstract

Popular fermented golden pomfret (Trachinotus ovatus) is prepared via spontaneous fermentation; however, the mechanisms underlying the regulation of its flavor development remain unclear. This study shows the roles of the complex microbiota and the dynamic changes in microbial community and flavor compounds during fish fermentation. Single-molecule real-time sequencing and molecular networking analysis revealed the correlations among different microbial genera and the relationships between microbial taxa and volatile compounds. Mechanisms underlying flavor development were also elucidated via KEGG based functional annotations. Clostridium, Shewanella, and Staphylococcus were the dominant microbial genera. Forty-nine volatile compounds were detected in the fermented fish samples, with thirteen identified as characteristic volatile compounds (ROAV > 1). Volatile profiles resulted from the interactions among the microorganisms and derived enzymes, with the main metabolic pathways being amino acid biosynthesis/metabolism, carbon metabolism, and glycolysis/gluconeogenesis. This study demonstrated the approaches for distinguishing key microbiota associated with volatile compounds and monitoring the industrial production of high-quality fermented fish products.

Keywords: Co-occurrence network, Fermented golden pomfret, Microbiota community, Volatile compound, Metabolic pathway

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Publication history

Received: 14 April 2022
Revised: 26 May 2022
Accepted: 22 June 2022
Published: 01 June 2023
Issue date: January 2024

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© 2024 Beijing Academy of Food Sciences. Publishing services by Tsinghua University Press.

Acknowledgements

This work was supported by the National Natural Science Foundation of China (32001733), the Earmarked fund for CARS (CARS-47), Guangxi Natural Science Foundation Program (2021GXNSFAA196023), Guangdong Basic and Applied Basic Research Foundation (2021A1515010833), Young Talent Support Project of Guangzhou Association for Science and Technology (QT20220101142) and the Special Scientific Research Funds for Central Non-profit Institutes, Chinese Academy of Fishery Sciences (2020TD69).

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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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