Microbial function in food fermentations: Current research and future directions

Area of Science:

• Microbiology
• Food Science
• Biotechnology

Background:

• Microorganisms drive fermentation, impacting food yield and quality.
• Current research often focuses on microbial composition, neglecting crucial functional roles.
• Understanding microbial function is vital for optimizing food flavor, texture, nutrition, and quality.

Purpose of the Study:

• To review methods for investigating microbial function in food fermentations.
• To critically assess the advantages and limitations of conventional and emerging techniques.
• To guide future research on microbial function in complex fermentation systems.

Main Methods:

• Overview of conventional methods like amplicon sequencing and omics.
• Discussion of emerging technologies such as stable-isotope probing and single-cell sequencing.
• Critical assessment of population-averaged data versus single-cell resolution.

Main Results:

• Conventional methods provide population-averaged data, masking functional heterogeneity and rare taxa.
• Emerging techniques offer deeper insights into the functional roles of individual microorganisms.
• Recent research highlights the importance of specific microbial functions in fermented foods.

Conclusions:

• A shift towards functional analysis, particularly with advanced techniques, is necessary.
• Emerging methods like stable-isotope probing and single-cell sequencing are key to uncovering hidden microbial functions.
• Targeted research on microbial function will enhance the quality and yield of fermented foods.