Influence mechanism of Saccharomyces cerevisiae on microbial community succession during Nongxiangxing Baijiu fermentation

Abstract

Abstract: Abstract: The changes of microbial niche and community assembly of fermented grains during Nongxiangxing Baijiu fermentation by Saccharomyces cerevisiae were analyzed to explore its influence mechanism on microbial succession of fermented grains. In this study, a strain of Saccharomyces cerevisiae screened from Nongxiangxing Baijiu was inoculated into fermented grains for fermentation experiment, and the microbial community structure of fermented grains in control group and experimental group was studied by high-throughput sequencing technology, and the niche changes of control group and experimental group were studied by statistical analysis method, and the assembly mechanism of microbial community was analyzed by zero model. The results showed that compared with the control group, the diversity and species composition of microbial communities in the experimental group decreased, the niche width of microbial communities in the experimental group decreased, and the relative content of specialized species groups increased. In the co-occurrence network, the relative abundance of specialized species in the main modules of the experimental group network increases, and the network complexity increases. The assembly of microbial communities in the control group and the experimental group is mainly dominated by random processes, but the importance of ecological drift and homogeneous diffusion in the experimental group is reduced, which makes the microbial community succession more certain. This study will further reveal the ecological function of Saccharomyces cerevisiae in the process of Nongxiangxing Baijiu fermentation, which has an important impact on Baijiu fermentation.

Key words: Keywords: Nongxiangxing Baijiu, Saccharomyces cerevisiae, Niche, Succession of community

CLC Number:

TS261

Huibo Luo Chuan SONG Dan Huang Hui-Bo LUO. Influence mechanism of Saccharomyces cerevisiae on microbial community succession during Nongxiangxing Baijiu fermentation[J]. FOOD SCIENCE.

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