食品科学 ›› 2022, Vol. 43 ›› Issue (12): 194-198.doi: 10.7506/spkx1002-6630-20210818-232

• 生物工程 • 上一篇    

臭鳜鱼源清酒乳杆菌的分离鉴定及其在臭鳜鱼发酵中的应用

周迎芹,孙子怡,黄晶晶,鄢嫣,郑海波,谢宁宁   

  1. (1.安徽省农业科学院农产品加工研究所,安徽 合肥 230031;2.安徽省食品微生物发酵与功能应用工程实验室,安徽 合肥 230031;3.安徽科技学院食品工程学院, 安徽 滁州 239000)
  • 发布日期:2022-07-01
  • 基金资助:
    安徽省重点研究与开发计划项目(202004a06020033);安徽省教育厅科研项目(KJ2020A0069); “十三五”国家重点研发计划重点专项(2016YFD0400400);国家自然科学基金青年科学基金项目(31801673)

Isolation and Identification of Lactobacillus sakei from Fermented Mandarin Fish and Its Application in Fermented Mandarin Fish

ZHOU Yingqin, SUN Ziyi, HUANG Jingjing, YAN Yan, ZHENG Haibo, XIE Ningning   

  1. (1. Institute of Agro-product Science and Technology, Anhui Academy of Agricultural Sciences, Hefei 230031, China; 2. Anhui Engineering Laboratory for Functional Microorganisms and Fermented Foods, Hefei 230031, China; 3. College of Food Engineering, Anhui University of Science and Technology, Chuzhou 239000, China)
  • Published:2022-07-01

摘要: 利用含溴甲酚绿的MRS鉴别培养基,从传统臭鳜鱼中分离筛选到1 株乳酸菌,经形态学、生理生化实验以及16S rDNA序列分析鉴定为清酒乳杆菌,并命名为SMF-L5。清酒乳杆菌SMF-L5在MRS液体培养基中生长良好,14 h进入生长稳定期,活菌数最高可达7.0×109 CFU/mL,培养24 h后乳酸产量达10 g/L,最适培养条件为:培养温度30.9 ℃、初始pH 6.15、接种量1.94%。菌株SMF-L5具有耐受0.08 g/mL NaCl的能力,对大肠杆菌、金黄色葡萄球菌等菌株具有明显的抑制作用。接种清酒乳杆菌SMF-L5发酵的臭鳜鱼,比自然发酵臭鳜鱼具有更好的色泽、质构和风味品质。研究结果表明,臭鳜鱼源清酒乳杆菌SMF-L5可作为优良的乳酸菌发酵剂,在臭鳜鱼工业化生产中具有应用潜力。

关键词: 臭鳜鱼;清酒乳杆菌;分离鉴定;生物学特性;接种发酵

Abstract: A Lactobacillus strain named SMF-L5 from traditional fermented mandarin fish was isolated using MRS medium with bromocresol green and identified as Lactobacillus sakei by morphological, physiological and biochemical assays and 16S rDNA sequence analysis. L. sakei SMF-L5 grew well in MRS liquid medium, entered the stable growth period after 14 h, and produced the highest viable cell count of 7.0 × 109 CFU/mL. The production of lactic acid of the strain was 10 g/L after 24 h cultivation. The optimal culture conditions were as follows: culture temperature 30.9 ℃, initial pH 6.15 and inoculum amount 1.94%. Strain SMF-L5 had tolerance to 0.08 g/mL NaCl, and obvious inhibitory effects on Escherichia coli, Staphylococcus aureus. The fermented mandarin fish inoculated with L. sakei SMF-L5 had superior color, texture and flavor than spontaneously fermented mandarin fish. These results showed that L. sakei SMF-L5 has the potential for application as an excellent starter in the industrial production of smelly mandarin fish .

Key words: fermented mandarin fish; Lactobacillus sakei; isolation and identification; biological characteristics; inoculated fermentation

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