食品科学

• 生物工程 • 上一篇    下一篇

植物乳杆菌分子伴侣蛋白基因在盐胁迫下的表达分析

乌日娜1,2,宋雪飞1,刘倩颖1,徐 鑫1,王茜茜1,武俊瑞1,*   

  1. 1.沈阳农业大学食品学院,辽宁 沈阳 110866;
    2.江南大学食品学院,食品科学与技术国家重点实验室,江苏 无锡 214122
  • 出版日期:2015-06-15 发布日期:2015-06-07

Expression of Chaperone Protein Genes in Lactobacillus plantarum under Salt Stress

WU Rina1,2, SONG Xuefei1, LIU Qianying1, XU Xin1, WANG Qianqian1, WU Junrui1,*   

  1. 1. College of Food Science, Shenyang Agricultural University, Shenyang 110866, China; 2. State Key Laboratory of Food Science
    and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
  • Online:2015-06-15 Published:2015-06-07

摘要:

以一株分离筛选自东北自然发酵大酱中的耐盐植物乳杆菌FS5-5为实验对象,通过实时荧光定量聚合酶链式反应技术,在转录水平上对其分子伴侣蛋白的相应基因在盐胁迫下的表达进行研究。结果表明:在菌体对数生长期,分子伴侣蛋白调控系统中,基因groEL、groES、dnaK、dnaJ、hsp1、hsp2、usp均受MRS培养基中NaCl的诱导而表达上调,并且NaCl的质量浓度越高,基因受诱导表达上调越显著,而hsp3虽受MRS培养基中NaCl的诱导表达有所上调,但其受诱导表达上调显著程度与NaCl质量浓度不呈正相关。

关键词: 植物乳杆菌, 实时荧光定量聚合酶链式反应, 盐胁迫, 基因表达

Abstract:

The objective of this study was to isolate a salt-tolerant Lactobacillus plantarum (FS5-5) from naturally fermented
miso in northeastern China. The expression of chaperone protein genes under salt stress at the transcriptional level was evaluated
by real-time fluorescence quantitative polymerase chain reaction (real time-PCR). Results showed that in the exponential
growth phase, the chaperone protein genes such as groEL, groES, dnaK, dnaJ, hsp1, hsp2, and usp were induced by NaCl
in MRS medium and their expressions were up-regulated. The higher NaCl concentration was, the more significant the
up-regulation was. Similarly, the heat shock protein gene hsp3 was induced by NaCl in MRS medium and its expression was
up-regulated, but the induced up-regulation was not positively correlated with NaCl concentration.

Key words: Lactobacillus plantarum, real-time fluorescence quantitative polymerase chain reaction (real time-PCR), salt stress, gene expression

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