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Bioconversion of soybean meal into gut microbiota-targeting polysaccharides via fermentation by Bacillus subtilis

文献类型： 外文期刊

作者： Wang, Cheng 1 ; Zhang, Yu 2 ; Wei, Siyu 2 ; Fu, Lele 1 ; Wang, Yizhen 2 ; Jin, Mingliang 2 ;

作者机构： 1.Xianghu Lab, Hangzhou 311231, Peoples R China

2.Zhejiang Univ, Inst Feed Sci, Key Lab Anim Feed & Nutr Zhejiang Prov, Key Lab Anim Nutr & Feed Sci Eastern China,Natl En, Hangzhou 310058, Peoples R China

3.Zhejiang Acad Agr Sci, Hangzhou 310021, Peoples R China

关键词： Gut microbiota; Polysaccharides; Solid-state fermentation; Soybean meal; Transcriptome

期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：9.7； 五年影响因子：10.2 ）

ISSN： 0959-6526

年卷期： 2024 年 464 卷

页码：

收录情况： SCI

摘要： Understanding the internal laws of probiotic solid-state fermentation is important for improving the nutritional composition and utilization of soybean meal (SBM). The present study aims to investigate the mechanism of SBM solid-state fermented by Bacillus subtilis over a 24 h period. The microstructure of the SBM was decomposed during fermentation. Post fermentation, the cellulose and hemicellulose content were significantly reduced by 38.83% and 22.24%, and the concentrations of small peptides and amino acids remarkably increased to 12.11% and 41.90%, respectively (P < 0.05). Notably, the results of transcriptome and enzyme activity highlighted that endo-1,4-beta-xylanase, endoglucanase and beta-1,4-mannan endonuclease were significantly synthesized and played critical roles in fiber degradation during fermentation. Additionally, the polysaccharides of SBM and fermented soybean meal (FSBM) were extracted and characterized, and it was found that the polysaccharide structures of FSBM were significantly different compared to pre -fermentation. The in vitro fermentation results of polysaccharides further indicated that fermented soybean meal polysaccharides (FSPS) dramatically promoted the abundance of porcine gut commensal Bifidobacterium and Lactobacillus, and enhance the microbial functions of fructose and mannose metabolism. These findings elucidate the microbial genomic mechanism during fermentation to reveal the potential regulatory effects of FSPS on gut microbiota and expand the utilization of SBM.

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