植物乳杆菌对脂环酸芽孢杆菌的抑菌机理研究Study on the Bacteriostatic Mechanism of Lactobacillus plantarum Against Alicyclobacillus
李国旻,谢英曼,董华煜,仇梦真,王然然,樊明涛,魏新元
摘要(Abstract):
脂环酸芽孢杆菌是当前许多水果饮品中的致腐菌,其中酸土脂环酸芽孢杆菌最为常见。许多被公认安全的乳酸菌对脂环酸芽孢杆菌具有抑菌活性。为了研究乳酸菌抑制脂环酸芽孢杆菌的机理,该研究从分离自中国传统泡菜的乳酸菌中,筛选出对酸土脂环酸芽孢杆菌DSM 3922~T具有较强抑菌活性的植物乳杆菌509,采用非靶向代谢组学分析了酸土脂环酸芽孢杆菌DSM 3922~T受植物乳杆菌509抑制时的代谢产物变化,受抑制后的酸土脂环酸芽孢杆菌DSM 3922~T中上调的代谢物有308个,下调的代谢物有666个,它们主要位于氨基酸代谢、核酸代谢、糖代谢、TCA循环、细胞壁合成和跨膜运输等通路中,其中大部分氨基酸及其氨基酰类、核苷及其磷酸盐类等物质均受到下调。研究结果表明,酸土脂环酸芽孢杆菌DSM 3922~T中许多参与重要生物途径的中间代谢物受到植物乳杆菌509的抑制,而这些代谢物的下调反过来又促使酸土脂环酸芽孢杆菌自身凋亡,从而达到抑菌效果。
关键词(KeyWords): 酸土脂环酸芽孢杆菌;植物乳杆菌;代谢产物;非靶向代谢组学
基金项目(Foundation): 国家自然科学基金(31871769)
作者(Author): 李国旻,谢英曼,董华煜,仇梦真,王然然,樊明涛,魏新元
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