食品科学 ›› 2020, Vol. 41 ›› Issue (9): 1-6.doi: 10.7506/spkx1002-6630-20190414-181

• 基础研究 •    下一篇

丁香酚对腐败希瓦氏菌和荧光假单胞菌的抑制机理

周倩倩,方士元,梅俊,谢晶   

  1. (1.上海海洋大学食品学院,上海 201306;2.上海水产品加工及贮藏工程技术研究中心,上海 201306;3.上海冷链装备性能与节能评价专业技术服务平台,上海 201306;4.食品科学与工程国家级实验教学示范中心(上海海洋大学),上海 201306)
  • 出版日期:2020-05-15 发布日期:2020-05-15
  • 基金资助:
    国家自然科学基金面上项目(31972142;31571914);现代农业产业技术体系建设专项(CARS-47); 上海市科委平台能力建设项目(19DZ2284000);上海市科委公共服务平台建设项目(17DZ2293400)

Inhibitory Mechanism of Eugenol on Shewanella putrefaciens and Pseudomonas fluorescens

ZHOU Qianqian, FANG Shiyuan, MEI Jun, XIE Jing   

  1. (1. College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; 2. Shanghai Engineering Research Center of Aquatic Product Processing & Preservation, Shanghai 201306, China; 3. Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China; 4. National Experimental Teaching Demonstration Center for Food Science and Engineering (Shanghai Ocean University), Shanghai 201306, China)
  • Online:2020-05-15 Published:2020-05-15

摘要: 为探讨丁香酚对海产品冷藏过程中优势腐败菌(腐败希瓦氏菌和荧光假单胞菌)的抑制作用及其机制,本实验先测定丁香酚对腐败希瓦氏菌和荧光假单胞菌的最小抑菌浓度(minimal inhibitory concentration,MIC),然后分别研究了0.5 MIC、1 MIC、2 MIC对腐败希瓦氏菌和荧光假单胞菌生长曲线的影响,通过对比分析丁香酚处理前后细胞的破坏情况,发现细胞外OD260 nm和OD280 nm、钾离子和碱性磷酸酶的水平均上升,细胞内三磷酸腺苷酶活力下降;从丁香酚处理后的扫描电子显微镜图像可看出,完整光滑的菌体出现裂解、粘黏现象,结合傅里叶变换红外光谱所呈现的代表脂质、蛋白质等分子成分官能团的改变,可以得出丁香酚能够破坏细胞壁,并使细胞膜通透性增大、细胞内容物流出,最终导致细胞死亡。

关键词: 丁香酚, 腐败希瓦氏菌, 荧光假单胞菌, 抑制作用, 细胞膜

Abstract: In order to investigate the inhibitory effect and underlying mechanism of eugenol on the dominant spoilage bacteria of Shewanella putrefaciens and Pseudomonas fluorescens during seafood cold storage, the minimal inhibitory concentrations (MICs) of eugenol against S. putrefaciens and P. fluorescens were determined, and then the inhibitory effects of eugenol atdoses of 0.5 MIC, 1 MIC and 2 MIC on the growth of S. putrefaciens and P. fluorescens were studied.?The damage caused by eugenol to the cell membrane was measured.?The results showed that the optical density (OD) at 260 and 280 nm wavelengths of extracellular substances, the content of potassium ions (K+) and the activity of alkaline phosphatase (AKP) increased on average, and the activity of intracellular ATPase decreased.?Scanning electron microscopic (SEM) images and Fourier transform infrared spectra showed that eugenol destroyed the cell wall, and increased the permeability of the cell membrane, leading to leakage of cell contents and finally cell death.

Key words: eugenol, Shewanella putrefaciens, Pseudomonas fluorescens, inhibition, cell membrane

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