Bacillus subtilis-Derived Postbiotics as a Multifunctional Bio-Catalyst for Enhancing Lactic Acid Bacteria Viability and Yogurt Quality
文献类型： 外文期刊
作者： Wu, Jing 1 ; Wang, Zhilin 2 ; Hu, Jingyi 2 ; Liu, Jing 2 ; Han, Xueying 2 ; Chen, Hongping 2 ; Zhu, Siming 1 ; Deng, Junjin 2 ;
作者机构： 1.Kashi Univ, Coll Life & Geog Sci, Xinjiang Key Lab Biol Resources & Ecol Pamirs Plat, Kashi 844008, Peoples R China
2.Guangdong Acad Agr Sci, Agrobiol Gene Res Ctr, State Key Lab Swine & Poultry Breeding Ind, Guangzhou 510640, Peoples R China
3.South China Univ Technol, Sch Food Sci & Engn, Guangzhou 510640, Peoples R China
4.Guangdong Lab Lingnan Modern Agr Heyuan Subctr, Heyuan 517500, Peoples R China
关键词：
lactic acid bacteria;
期刊名称：FOODS （ 影响因子：5.1； 五年影响因子：5.6 ）
ISSN：
年卷期： 2025 年 14 卷 10 期
页码：
收录情况： SCI
摘要： This study demonstrates that Bacillus subtilis GDAAS-A32-derived postbiotics (BSP) enhance yogurt production by optimizing lactic acid bacteria (LAB) viability and functionality. BSP enhanced the growth kinetics and biomass accumulation of Streptococcus thermophilus and Lactobacillus bulgaricus in both an anaerobic and aerobic pure system. The addition of BSP significantly increased the viable cell counts of S. thermophilus and L. bulgaricus, milk-clotting activity, sensory properties, and extracellular polysaccharide content and improved the rheological properties. Moreover, BSP elevated viable counts of S. thermophilus and L. bulgaricus to 6.18 x 108 CFU/g and 1.03 x 108 CFU/g, respectively, by day 7-representing 11.3-fold and 9.3-fold increases versus controls at 20% supplementation. Metabolomic signatures confirmed peptidoglycan reinforcement and flavor enhancement. Mechanistically, BSP supplementation might reduce urate and H2O2 toxicity through NH3-mediated proton neutralization and oxygen scavenging, while establishing a pyrimidine salvage network and redirecting one-carbon metabolism, resulting in enhanced stress tolerance and significant improvements in bacterial viability.
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