食品科学 ›› 2011, Vol. 32 ›› Issue (15): 88-93.doi: 10.7506/spkx1002-6630-201115021

• 基础研究 • 上一篇    下一篇

乌梅提取液对李斯特菌抑菌机理

耿 飞,王 伟,周 涛*   

  1. 南京师范大学金陵女子学院食品科学与工程系
  • 出版日期:2011-08-15 发布日期:2011-07-26
  • 基金资助:
    江苏省农业科技自主创新基金项目(CX(09)627

Antibacterial Mechanisms of Fructus mume Extract against Listeria innocua

GENG Fei,WANG Wei,ZHOU Tao*   

  1. (Department of Food Science and Engineering, Ginling College, Nanjing Normal University, Nanjing 210097, China)
  • Online:2011-08-15 Published:2011-07-26

摘要: 运用流式细胞仪研究乌梅提取液对李斯特菌的抑菌机理。首先通过抑菌实验确定乌梅提取液对李斯特菌的最小抑菌浓度(MIC)为0.625mg/mL,然后用1、2、4倍MIC的乌梅提取液对李斯特菌进行处理,通过流式细胞仪对其前向散射光(FSC)变化、DNA含量变化、细胞膜电位变化、细胞周期变化和Annexin V-FITC/PI双标记法、细胞内Ca2+含量变化指标进行检测,探索抑菌机理。结果表明,乌梅提取液通过破坏李斯特菌的细胞膜系统和阻滞DNA的合成抑制其生长繁殖。

关键词: 流式细胞仪, 乌梅, 李斯特菌, 抑菌机理

Abstract: The antibacterial mechanisms of ethanol extract from Fructus mume (prepared by reflux extraction with 95% ethanol and subsequent rotary evaporation until a concentration of 1 g/mL, namely raw material weight/condensed extract volume ratio = 1:1) against Listeria innocua were assayed by flow cytometry. The minimum inhibitory concentration (MIC) of the extract against L. innocua was 0.625 mg/mL. In the presence of the extract at different concentrations such as 1, 2 and 4 MICs, the changes of forward scatter (FSC) light, DNA content, membrane potential, cell cycle, Ca2+ and Annexin V-FITC/PI double staining of L. innocua were analyzed by flow cytometry. The results showed that the extract could inhibit L. innocua by destroying cell membrane system and blocking DNA synthesis.

Key words: flow cytometry, Fructus mume, L. innocua, antibacterial mechanism

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