The response of LuxS/AI-2 quorum sensing in Lactobacillus fermentum 2-1 to changes in environmental growth conditions

被引：0
作者：
Yue Gu
Bo Li
Jianjun Tian
Rong Wu
Yinfeng He
机构：
[1] Inner Mongolia Agricultural University,College of Food Science and Engineering
来源：
Annals of Microbiology | 2018年 / 68卷
关键词：
Quorum sensing; 2-1; Autoinducer-2; Transcription; Environmental stresses;
D O I：
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中图分类号：
学科分类号：
摘要：
Quorum sensing (QS) is a communication mechanism based on the production of autoinducers in order to regulate cooperative behavior and physiological traits among bacteria. Autoinducer-2 (AI-2) is mediated by luxS and pfs genes and is used for both intra- and interspecies communication. The effects of environmental stresses, such as pH, temperature, osmotic, and nutrient stresses, were investigated on the LuxS/AI-2 QS system in Lactobacillus fermentum 2-1. The AI-2 activity in L. fermentum 2-1 was induced by stress responses to acid shock, high temperature, and nutrient inadequacy while a decrease in activity was correlated with high pH, low temperature, and osmotic stress. Maximum transcription of luxS and pfs was achieved after L. fermentum 2-1 was exposed to acid shock, low temperature, high concentration of NaCl, and diluted MRS broth. The results indicate that various stresses affected the LuxS/AI-2 QS system, which may be involved in the resistance process of the L. fermentum 2-1.
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页码：287 / 294
页数：7
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