食品科学 ›› 2009, Vol. 30 ›› Issue (23 ): 35-40.doi: 10.7506/spkx1002-6300-200923006

• 基础研究 • 上一篇    下一篇

液熏罗非鱼片加工过程中微生物群落的PCR-DGGE 分析

蔡秋杏1 , 2,李来好2 ,* ,陈胜军2,杨贤庆2,岑剑伟2,吴燕燕2,刁石强2,石 红2   

  1. 1.广东海洋大学食品科技学院 2.中国水产科学研究院南海水产研究所
  • 收稿日期:2009-08-25 出版日期:2009-12-01 发布日期:2010-12-29
  • 通讯作者: 李来好 E-mail:laihaoli@163.com
  • 基金资助:

    农业部“948”项目(2006-G40);2007 年公益性行业(农业)科研专项(3-49);广东省农业攻关项目(2008A020100006;2009B020201003);广东省海洋渔业科技推广专项(A200899B02);中央级公益性专项资金项目(2007ZD05)

PCR-DGGE Analysis of Bacterial Community during Processing of Liquid-smoked Tilapia

CAI Qiu-xing1,2,LI Lai-hao2,*,CHEN Sheng-jun2,YANG Xian-qing2,CEN Jian-wei2,WU Yan-yan2,DIAO Shi-qiang2,SHI Hong2   

  1. 1. College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524025, China;
    2. South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
  • Received:2009-08-25 Online:2009-12-01 Published:2010-12-29
  • Contact: LI Lai-hao E-mail:laihaoli@163.com

摘要:

为弄清液熏罗非鱼片加工过程中微生物污染的源头,以进一步防控产品的微生物污染提供依据。应用基于细菌16S rDNA 的PCR-DGGE(PCR-denaturing gradient gel electrophoresis,PCR- 变性梯度凝胶电泳)技术分析液熏罗非鱼片主要加工关键环节的微生物群落结构,提取样品中的细菌总DNA,对细菌的16S rDNA 的V6~V8 区段进行PCR 扩增后,进行变性梯度凝胶电泳(DGGE),对DGGE 图谱进行微生物多样性分析,对主要条带进行序列分析并构建系统发生树。结果表明:10 个条带所代表的优势种很可能来源于以下几个属:巨型球菌属(Macrococus)、微球菌属(Micrococus)、肠道细菌属(Enterobacter)、假单胞菌属(Pseudomonas)、弧菌属(Vibrio)、突柄杆菌属(Prosthecobacter)、布特菌属(Buttiauxella),其中肠道细菌属、微球菌属、假单胞菌属和弧菌属细菌都具有使产品腐败的潜能。本研究表明:液熏罗非鱼片中呈现微生物多样性,PCR-DGGE 技术可用于研究液熏罗非鱼片加工过程中的微生物群落结构及变化,且具有一定的优越性。

关键词: 液熏罗非鱼片, PCR- 变性梯度凝胶电泳, 微生物群落

Abstract:

In order to understand the origin of bacterial contamination in liquid-smoked tilapia fillet during processing and provide evidence for controlling bacterial contamination, bacterial community and diversity were analyzed by PCR-DGGE (PCRdenaturing gradient gel electrophoresis). The total bacterial DNA was extracted from samples and V6-V8 regions of bacterial 16S rDNA gene were then amplified to establish phylogenetic tree. Results indicated that the bacterial community could contain Macrococus, Micrococus, Enterobacter, Pseudomonas, Vibrio, Prosthecobacter and Buttiauxella. Pseudomonas, Micrococus, Vibrio and Enterobacter had potential to spoil liquid-smoked tilapia fillets. Therefore, PCR-DGGE used for analyzing bacterial community and diversity during processing of liquid-smoked tilapia was feasible and convenient.

Key words: liquid-smoked tilapia fillet, PCR-denaturing gradient gel electrophoresis (PCR-DGGE), bacterial community

中图分类号: