Isolation and functional analysis of acid-producing bacteria from bovine rumen

文献类型： 外文期刊

第一作者： Yu, Jinming

作者： Yu, Jinming;Li, Cunyuan;Li, Xiaoyue;Liu, Kaiping;Liu, Zhuang;Ni, Wei;Hu, Shengwei;Ni, Wei;Zhou, Ping;Wang, Limin;Hu, Shengwei

作者机构：

关键词： Bovine rumen; Sheep; Microbes; SCFAs; 16S rRNA

期刊名称：PEERJ （ 影响因子：2.7； 五年影响因子：3.1 ）

ISSN： 2167-8359

年卷期： 2023 年 11 卷

页码：

收录情况： SCI

摘要： Ruminants such as cattle rely mainly on microbes in the rumen to digest cellulose and hemicellulose from forage, and the digestion products are mainly absorbed and utilized by the host in the form of short chain fatty acids (SCFAs). This study aimed to isolate acid-producing strains from the cattle rumen and investigate their functions. A total of 980 strains of acid-producing bacteria were isolated from cattle rumen contents using a medium supplemented with bromocresol green. Combined with the test of acid production ability and 16S rRNA amplicon sequencing technology, five strains were selected based on their ability to produce relatively high levels of acid, including Bacillus pumillus, Enterococcus hirae, Enterococcus faecium, and Bacillus subtilis. Sheep were treated by gavage with a mixed bacterial suspension. The results showed that mixed bacteria significantly increased the body weight gain and feed conversion rate of sheep. To investigate the function of acid-producing bacteria in sheep, we used 16S rDNA sequencing technology to analyze the rumen microbes of sheep. We found that mixed bacteria changed the composition and abundance of sheep rumen bacteria. Among them, the abundance of Bacteroidota, Actinobacteriota, Acidobacteriota, and Proteobacteria was significantly increased, and the abundance of Firmicutes was significantly decreased, indicating that the changes in gut microbiota changed the function of the sheep rumen. The acid-producing bacteria isolated in this study can effectively promote the growth of ruminants, such as cattle and sheep, and can be used as additives to improve breeding efficiency, which lays a foundation for subsequent research on probiotics.

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[1]Isolation and functional analysis of acid-producing bacteria from bovine rumen. Yu, Jinming,Li, Cunyuan,Li, Xiaoyue,Liu, Kaiping,Liu, Zhuang,Ni, Wei,Hu, Shengwei,Ni, Wei,Zhou, Ping,Wang, Limin,Hu, Shengwei. 2023

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