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Applied and Environmental Microbiology, January 1999, p. 291-293, Vol. 65, No. 1
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Influence of Osmolarity and the Presence of an Osmoprotectant on Lactococcus lactis Growth and Bacteriocin Production

Patricia Uguen,1,* Jack Hamelin,2 Jean-Paul Le Pennec,1 and Carlos Blanco3

Laboratoire de Biologie et Chimie Moléculaires, Université de Bretagne-Sud, 56000 Vannes,1 and Groupe Synthèse et Electrosynthèse Organiques 3 (UMR CNRS 6510)2 and Equipe Membranes et Osmorégulation (UPRES-A CNRS 6026),3 Université de Rennes I, Campus de Beaulieu, 35042 Rennes, France

Received 15 July 1998/Accepted 21 October 1998

Growth inhibition of Lactococcus lactis provoked by increasing osmolarity is reversed when glycine betaine (GB) or its analogs are added to a defined medium. Lacticin 481 production increased sharply with growth medium osmolarity in the absence of osmoprotectant but remained unaffected when GB was supplied in media of increasing osmolarity.

* Corresponding author. Mailing address: Laboratoire de Biologie et Chimie Moléculaires, Université de Bretagne-Sud, 1 rue de la Loi, 56000 Vannes, France. Phone: (33) 2 97 68 31 94. Fax: (33) 2 97 68 16 48. E-mail: Patricia.Uguen{at}univ-ubs.fr.

Applied and Environmental Microbiology, January 1999, p. 291-293, Vol. 65, No. 1
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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