湖北农业科学 ›› 2021, Vol. 60 ›› Issue (24): 169-172.doi: 10.14088/j.cnki.issn0439-8114.2021.24.037

• 贮藏·加工 • 上一篇    下一篇

马铃薯鲜粉污染菌的分离鉴定及抑制物筛选

魏雄博1a, 白永宏2, 鲍壹江1a, 王亚洁1a, 刘乾1a, 任建芳1a, 陈国梁1a,1b   

  1. 1.延安大学,a.生命科学学院;b.陕西省红枣重点实验室,陕西 延安 716000;
    2.延安职业技术学院,陕西 延安 716000
  • 收稿日期:2021-03-15 出版日期:2021-12-25 发布日期:2022-01-04
  • 通讯作者: 陈国梁(1974-),男,陕西榆林人,教授,硕士,主要从事生物化学与分子生物学研究,(电话)13636728860(电子信箱)glc9359@163.com。
  • 作者简介:魏雄博(1995-),男,陕西渭南人,在读硕士研究生,研究方向为生物化学与分子生物学,(电话)13892569128(电子信箱)2683476120@qq.com;
  • 基金资助:
    陕西省提升公众科学素质计划项目(2020PLS017); 延安市科技攻关项目(2017KN-11); 国家大学生创新训练计划项目(S202010719034); 延安大学大学生创新训练计划项目(D20191097); 延安大学资政育人项目(YDZZYB19-029)

Isolation and identification of bacteria in fresh potato noodles and screening of bacteriostatic substances

WEI Xiong-bo1a, BAI Yong-hong2, BAO Yi-jiang1a, WANG Ya-jie1a, LIU Qian1a, REN Jian-fang1a, CHEN Guo-liang1a,1b   

  1. 1a.College of Life Sciences; 1b.Shaanxi Key Laboratory of Chinese Jujube,Yan’an University,Yan’an 716000,Shaanxi,China;
    2. Yan’an Vocational and Technical College,Yan’an 716000,Shaanxi,China;
  • Received:2021-03-15 Online:2021-12-25 Published:2022-01-04

摘要: 为探究引起马铃薯鲜粉贮藏期污染变质的细菌并找到合适的抑菌物,以延长其保鲜期,采用平板划线分离法对污染细菌进行分离纯化并通过形态学特征、理化性质及16S rDNA序列等对其进行初步鉴定,并通过滤纸片法添加双乙酸钠溶液、山梨酸钾溶液、八角茴香精油粗提物、柑橘精油粗提物4种抑菌物对其进行抑菌试验。结果表明,从污染的马铃薯鲜粉中初步分离出4种菌株,其中1株菌属为短小杆菌属(Curtobacterium);4种抑菌物对短小杆菌属、埃希氏菌属、芽孢杆菌属3种易染菌均有一定的抑菌效果,且在相同浓度下双乙酸钠溶液抑菌效果最好,可作为马铃薯鲜粉易染菌候选抑制剂。

关键词: 马铃薯鲜粉, 污染菌, 分离鉴定, 16S rDNA, 抑制物

Abstract: In order to explore the bacteria causing pollution and deterioration of fresh potato noodles during storage and find suitable bacteriostatic substances to prolong its fresh-keeping period. The contaminated bacteria were isolated and purified by plate line separation method, and preliminarily identified by morphological characteristics, physical and chemical properties and 16S rDNA sequence. The bacteriostatic test was carried out by adding 4 kinds of bacteriostatic substances such as sodium diacetate, potassium sorbate, crude extract from star anise essential oil and crude extract of citrus essential oil by filter paper method. The results showed that four strains were initially isolated from the contaminated potato noodles, one of which was Curtobacterium. The four bacteriostatic substances had certain bacteriostatic effects on the three susceptible bacteria of Curtobacterium, Escherichia and Bacillus Cohn, and sodium diacetate solution had the best bacteriostatic effect at the same concentration and could be used as a candidate inhibitor for fresh potato noodles susceptible bacteria.

Key words: fresh potato noodles, contaminated bacteria, isolation and identification, 16S rDNA, inhibitor

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