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Applied and Environmental Microbiology, December 2004, p. 7555-7557, Vol. 70, No. 12
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.12.7555-7557.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Role for Compatible Solutes Glycine Betaine and L-Carnitine in Listerial Barotolerance

Mary Smiddy,1 Roy D. Sleator,2,3 Margaret F. Patterson,4,5 Colin Hill,2,3* and Alan L. Kelly1

Departments of Food and Nutritional Sciences,1 Microbiology,2 The Alimentary Pharmabiotic Centre, University College, Cork, Ireland,3 Food Science Division (Food Microbiology), Department of Agriculture and Rural Development,4 Food Science Department, The Queen's University of Belfast, Belfast, Northern Ireland5

Received 27 April 2004/ Accepted 22 July 2004

ABSTRACT

Increased listerial barotolerance at elevated osmolarity is attributed, in part, to the presence of accumulated betaine and L-carnitine. The percentage of listerial survival following exposure to 400 MPa for 5 min increased from 0.008 to 0.02% with added L-carnitine (5 mM) and to 0.05% with added betaine (5 mM). Furthermore, listerial cells incapable of transporting compatible solutes fail to adapt to high pressure at elevated osmolarity.

* Corresponding author. Mailing address: Department of Microbiology, University College, Cork, Ireland. Phone: 353 21 4901373. Fax: 353 21 4903101. E-mail: c.hill{at}ucc.ie.

Applied and Environmental Microbiology, December 2004, p. 7555-7557, Vol. 70, No. 12
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.12.7555-7557.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Sheehan, V. M., Sleator, R. D., Fitzgerald, G. F., Hill, C. (2006). Heterologous Expression of BetL, a Betaine Uptake System, Enhances the Stress Tolerance of Lactobacillus salivarius UCC118.. Appl. Environ. Microbiol. 72: 2170-2177 [Abstract] [Full Text]  


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