Construction of synthetic microbiota for reproducible flavor metabolism in Chinese light aroma type liquor produced by solid-state fermentation

发酵 风味 食品科学 芳香 肠道菌群 乳酸菌 酵母 乳酸 生物 化学 细菌 微生物代谢 食品加工中的发酵 生物化学 遗传学
作者
Qun Wu,Shilei Wang,Yao Nie,Yan Xu
出处
期刊:bioRxiv 被引量:2
标识
DOI:10.1101/510610
摘要

ABSTRACT Natural microbiota plays an essential role in flavor compounds producing for traditional food fermentation. Whereas, the fluctuation of natural microbiota results in the inconstancy of food quality. Thus, it is critical to reveal the core microbiota for flavor compounds producing and construct a synthetic core microbiota for constant food fermentation. Here, we revealed the core microbiota based on their flavor-producing and co-occurrence performance, using Chinese light aroma type liquor as a model system. Five genera were identified to be the core microbiota, including Lactobacillus, Saccharomyces, Pichia, Geotrichum , and Candida . The synthetic core microbiota of these five genera presented a reproducible dynamic profile with that in the natural microbiota. Monte Carlo test showed that the interpretation of five environmental factors (lactic acid, ethanol and acetic acid contents, moisture and pH) on the synthetic microbiota distribution were highly significant ( P < 0.01), which was similar with that in the natural fermentation system. In addition, 77.27% of the flavor compounds produced by the synthetic core microbiota showed a similar dynamic profile ( ρ > 0) with that in the natural liquor fermentation process, and the flavor profile presented a similar composition. It indicated that the synthetic core microbiota is efficient for reproducible flavor metabolism. This work established a method for identifying core microbiota and constructing a synthetic microbiota for reproducible flavor compounds. It is of great significance for the tractable and constant production of various fermented foods. IMPORTANCE The transformation from natural fermentation to synthetic fermentation is essential to construct a constant food fermentation process, which is the premise for stably making high-quality food. According to the functions of flavor-producing and co-occurring in dominant microbes, we provided a system-level approach to identify the core microbiota in Chinese light aroma type liquor fermentation. In addition, we successfully constructed a synthetic core microbiota to simulate the microbial community succession and flavor compounds production in the in vitro system. The constructed synthetic core microbiota could not only facilitate a mechanistic understanding of the structure and function of the microbiota, but also be beneficial for constructing a tractable and reproducible food fermentation process.
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