食品科学 ›› 2020, Vol. 41 ›› Issue (24): 39-45.doi: 10.7506/spkx1002-6630-20200721-272

• 生物工程 • 上一篇    下一篇

3株发酵香肠源乳酸菌体外功能特性的比较

冯美琴,栾晓旭,孙健   

  1. (1.金陵科技学院动物科学与技术学院,江苏 南京 210038;2.南京农业大学食品科技学院,国家肉品质量安全控制工程技术研究中心,江苏 南京 210095)
  • 出版日期:2020-12-25 发布日期:2020-12-28
  • 基金资助:
    国家自然科学基金面上项目(31771986);国家自然科学基金青年科学基金项目(31401516); 金陵科技学院博士基金项目(JIT-B-201301)

Comparative Study on the in Vitro Functional Characteristics of Three Strains of Lactic Acid Bacteria Isolated from Fermented Sausages

FENG Meiqin, LUAN Xiaoxu, SUN Jian   

  1. (1. College of Animal Science and Technology, Jinling Institute of Technology, Nanjing 210038, China; 2. Key Laboratory of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China)
  • Online:2020-12-25 Published:2020-12-28

摘要: 为获得具有高抗氧化活性的功能性肉品发酵剂,对前期实验筛选出的源自中式传统发酵香肠、适于肉制品发酵的3 株乳酸菌菌株(植物乳杆菌NJ107和KM119、发酵乳杆菌GZ114)的发酵上清液、菌体细胞和破碎提取物进行体外抗氧化活性评价,并通过菌株表面疏水性、耐模拟胃肠液消化能力和耐胆盐能力实验评价菌株的体外益生特性。结果表明,3 株乳酸菌均具有较好的体外抗氧化活性,发酵上清液的DPPH自由基清除率和还原能力均显著高于菌体细胞和破碎提取物(P<0.05),其中GZ114最高;菌体细胞的羟自由基清除能力、超氧阴离子自由基清除能力和Fe2+螯合能力均显著高于发酵上清液和破碎提取物(P<0.05),最高活性依次为KM119、GZ114和NJ107;3 株菌发酵上清液的超氧化物歧化酶活力均显著高于菌体细胞和破碎提取物(P<0.05),NJ107和GZ114的谷胱甘肽过氧化物酶和过氧化氢酶活力显著高于KM119(P<0.05);菌株表面疏水性由高到低依次为NJ107、GZ114和KM119;3 株菌对模拟胃肠液、0.5%胆盐均具有较高的耐受性。

关键词: 乳酸菌;发酵香肠;抗氧化活性;益生特性

Abstract: To obtain functional meat starters with high antioxidant activity, three strains of lactic acid bacteria (Lactobacillus plantarum NJ107 and KM119, and L. fermentum GZ114) isolated from Chinese traditional fermented sausages were selected to compare their in vitro functional characteristics. The in vitro antioxidant activities of the fermentation supernatant, intact cells and cell-free extracts of each strain were evaluated. The in vitro probiotic properties were evaluated by surface hydrophobicity, and the ability to tolerate simulated gastroenteric fluid and bile salt. The results showed that all three strains had good antioxidant activity in vitro. The 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging capacity and reducing capacity of the fermentation supernatant were significantly higher than those of the intact cells and the cell-free extracts (P < 0.05), and among the three strains, GZ114 displayed the highest DPPH radical scavenging activity. The hydroxyl radical scavenging capacity, superoxide anion radical scavenging capacity and ferrous ion chelating capacity of the intact cells were significantly higher than those of the fermentation supernatant and the cell-free extracts (P < 0.05), and the highest hydroxyl radical scavenging capacity, superoxide anion radical scavenging capacity and ferrous ion chelating capacity were observed in KM119, GZ114 and NJ107, respectively. The superoxide dismutase (SOD) activity of the fermentation supernatant were significantly higher than those of the intact cells and the cell-free extracts for all three strains (P < 0.05). The activities of glutathione peroxidase (GSH-PX) and catalase (CAT) in NJ107 and GZ114 were significantly stronger than those in KM119 (P < 0.05). In terms of decreasing surface hydrophobicity, these strains were ranked as follows: NJ107 > GZ114 > KM119. All the three strains showed high tolerance to simulated gastroenteric fluid and 0.5% bile salt.

Key words: lactic acid bacteria; fermented sausages; antioxidant activity; probiotic properties

中图分类号: