食品科学 ›› 2022, Vol. 43 ›› Issue (22): 151-158.doi: 10.7506/spkx1002-6630-20211208-094

• 生物工程 • 上一篇    

真空包装冷鲜牛肉中生物保护菌的分离鉴定与生物学特性

杨慧轩,罗欣,朱立贤,杨啸吟,韩广星,李和,董鹏程,张一敏   

  1. (1.山东农业大学食品科学与工程学院,山东 泰安 271018;2.国家肉牛牦牛产业技术体系临沂站,山东 临沂 276000;3.国家肉牛牦牛产业技术体系通辽站,内蒙古 通辽 028000)
  • 发布日期:2022-12-12
  • 基金资助:
    现代农业(肉牛)产业技术体系建设专项(CARS-37);国家重点研发政府间国际科技创新合作专项(2019YFE0103800); 山东省现代农业产业技术体系创新团队建设专项(SDAIT-09-09);山东省农业良种工程项目(2020LZGC014-05)

Isolation, Identification and Biological Characteristics of Bioprotective Bacteria from Vacuum Packaged Chilled Beef

YANG Huixuan, LUO Xin, ZHU Lixian, YANG Xiaoyin, HAN Guangxing, LI He, DONG Pengcheng, ZHANG Yimin   

  1. (1. College of Food Science and Engineering, Shandong Agricultural University, Tai’an 271018, China;2. Linyi Station, National Beef Cattle Industrial Technology System, Linyi 276000, China; 3. Tongliao Station, National Beef Cattle Industrial Technology System, Tongliao 028000, China)
  • Published:2022-12-12

摘要: 从真空包装冷鲜牛肉中分离筛选得到7 株具有生物保护潜力的乳酸菌,通过细菌形态学观察、生理生化鉴定和16S rDNA分子生物学鉴定确定为清酒乳杆菌(Lactobacillus sakei)。所有分离菌株均在25~35 ℃生长良好,其中菌株RS-16和RS-25的生长及产酸能力较强,除RS-33和RS-41外,其他菌株均未检测出耐药性或毒力基因。使用琼脂扩散法对7 株分离菌的抑菌性进行测定,结果表明,分离菌株对所有指示菌均表现出拮抗效果,且菌株RS-16和RS-25对鼠伤寒沙门氏菌的拮抗效果显著优于其他菌株;对保护菌的抑菌产物分析表明其抑菌性来源于有机酸。本研究从真空包装冷鲜牛肉中分离鉴定并筛选得到2 株具有生物保护潜力的清酒乳杆菌,丰富了生物保护菌的种质资源。

关键词: 真空包装;冷鲜牛肉;分离鉴定;生物保护;清酒乳杆菌

Abstract: A total of seven lactic acid bacteria strains with bioprotective potential were isolated and characterized from vacuum-packaged chilled beef. By morphological observation, physiological and biochemical identification and 16S rDNA sequencing, they were determined as Lactobacillus sakei. All isolates grew well at 25?35 ℃, and RS-16 and RS-25 grew better and had a stronger acid-producing ability. Antibiotic resistance and virulence genes were detected in RS-33 and RS-41 but not any of the other strains. The results of agar diffusion test showed that the seven isolates had antagonistic effect on all indicator strains, and the antagonistic effect of strains RS-16 and RS-25 on Salmonella typhimurium was better than that of the other strains (P < 0.05). Organic acids secreted by the isolated strains were found to have antibacterial activity.

Key words: vacuum packaging; chilled beef; isolation and identification; biological protection; Lactobacillus sakei

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