Availability of glutamate and arginine during acid challenge determines cell density-dependent survival phenotype of Escherichia coli strains

被引：35

作者：

Cui, SH

Meng, JH

Bhagwat, AA

机构：

[1] USDA ARS, Produce Qual & Safety Lab, Henry A Wallace Beltsville Agr Res Ctr, Beltsville, MD 20705 USA

[2] Univ Maryland, Dept Nutr & Food Sci, College Pk, MD 20742 USA

来源：

APPLIED AND ENVIRONMENTAL MICROBIOLOGY | 2001年 / 67卷 / 10期

关键词：

D O I：

10.1128/AEM.67.10.4914-4918.2001

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The cell density-dependent acid sensitivity phenotypes of Escherichia coli strains K-12 and O157:H7 were examined with reference to three possible mechanisms of acid resistance. There was no evidence of any diffusible substance released from dead cells which could influence the cell density-dependent acid survival phenotype. Instead, cell density-dependent acid survival phenotype was associated with induction of glutamate and arginine-decarboxylase acid survival pathways and concomitant availability of glutamate and arginine during acid challenge.

引用

页码：4914 / 4918

页数：5

共 24 条

[1] SURVIVAL AND GROWTH OF ESCHERICHIA-COLI O157-H7 IN-GROUND, ROASTED BEEF AS AFFECTED BY PH, ACIDULANTS, AND TEMPERATURE [J].