Environmental factor driven microbial interactions regulate flavor metabolisms in polymicrobial fermented alcoholic...

Area of Science:

• Food Science and Microbiology
• Biotechnology
• Sensory Science

Background:

• Fermented alcoholic beverages possess diverse sensory profiles due to complex microbial metabolism.
• Environmental factors significantly influence microbial interactions and flavor metabolite synthesis, but the precise mechanisms remain unclear.
• Understanding these links is crucial for optimizing fermented beverage production.

Purpose of the Study:

• To systematically discuss regulatory mechanisms of microbial interactions governing flavor formation in environment-driven polymicrobial fermentation.
• To elucidate a dynamic coupling framework: Environmental factors-Microbial interactions-Flavor regulation.
• To integrate global fermented alcoholic beverages (e.g., Baijiu, Pulque, grape wine) to understand this framework.

Main Methods:

• Integration of diverse fermented alcoholic beverage data.
• Elucidation of the Environmental factors-Microbial interactions-Flavor regulation framework.
• Application of cross-scale methodologies including multi-omics, computational modeling, and IoT sensing.

Main Results:

• Environmental gradients (temperature, oxygen, pH) shape microbial interactions by modulating equilibria.
• Microbial interactions directly orchestrate flavor metabolome assembly: synergy enhances esters, competition balances diversity, and antagonism suppresses off-flavors.
• Flavor metabolites provide feedback, reshaping the microenvironment (acidification, anaerobiosis).

Conclusions:

• The established framework reveals a closed-loop system where environment, microbes, and flavor are dynamically coupled.
• This framework provides a foundation for designing synthetic microbial consortia and robust starter cultures for stable flavor production.
• It guides targeted flavor optimization in fermented alcoholic beverages.