数字农科院2.0

Detection Of Viable And Total Bacterial Community In The Pit Mud Of Chinese Strong-Flavor Liquor Using Propidium Monoazide Combined With Quantitative Pcr And 16S Rrna Gene Sequencing

文献类型： 外文期刊

作者： Tan, GX; Zhou, R; Zhang, WQ; Hu, YL; Ruan, ZY; Li, J; Zhang, CY; Shen, DJ; Peng, N; Liang, YX; Zhao, SM

作者机构：

关键词： 16S Rrna Gene Sequencing; Chinese Strong-Flavor Liquor; Pit Mud; Propidium Monoazide (Pma); Viable Microbe Detection

期刊名称： FRONTIERS IN MICROBIOLOGY

ISSN： 1664-302X

年卷期： 2020 年 11 卷

页码：

收录情况： JCR（2021版）

摘要： Microbiota in the pit mud (PM) plays a crucial role in the production of Chinese strong-flavor liquor (CSFL), the most popular distilled liquor in China. However, previous studies used total microbes, instead of viable ones, for the characterization of the microbial community in this environment. In this study, we used propidium monoazide (PMA) combined with quantitative polymerase chain reaction (qPCR) and 16S rRNA gene sequencing to verify the effect of non-viablee bacteria on the characterization of PM bacteria. After PMA concentration optimization, 50 mu M PMA was chosen to pretreat 5 and 20 years PMs. The qPCR results showed that there were 50.78 and 71.84% of non-viable bacteria in the 5-year PM and 20-year PM, respectively. Both copy numbers of total bacteria and viable bacteria were significantly higher in 20-year PM than those in 5-year PM. Nevertheless, in terms of bacterial diversity and composition analyses at the operational taxonomic unit (OTU), phylum, class, and genus levels, 16S rRNA gene sequencing results displayed no significant differences between total bacteria and viable bacteria in both PM types. In conclusion, it is necessary for non-viable bacteria to be considered in determining absolute biomass of bacteria in PM, but not necessary in the analysis of diversity and composition of PM bacteria. To the best of our knowledge, our study is the first attempt to analyze viable bacteria in the PM of CSFL and provides useful information on how to accurately characterize a microbial community in a PM environment.

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