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Applied and Environmental Microbiology, July 2006, p. 5089-5092, Vol. 72, No. 7
0099-2240/06/$08.00+0     doi:10.1128/AEM.00573-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Biofilm Formation by Bacillus cereus Is Influenced by PlcR, a Pleiotropic Regulator

Yi-Huang Hsueh,1 Eileen B. Somers,1 Didier Lereclus,2 and Amy C. Lee Wong1*

Department of Food Microbiology and Toxicology, Food Research Institute, University of Wisconsin, 1925 Willow Drive, Madison, Wisconsin 53706,1 Unité Génétique Microbienne et Environnement, Institut National de la Recherche Agronomique, La Minière, 78285 Guyancourt Cedex, France2

Received 9 March 2006/ Accepted 26 April 2006

The {Delta}plcR mutant of Bacillus cereus strain ATCC 14579 developed significantly more biofilm than the wild type and produced increased amounts of biosurfactant. Biosurfactant production is required for biofilm formation and may be directly or indirectly repressed by PlcR, a pleiotropic regulator. Coating polystyrene plates with surfactin, a biosurfactant from Bacillus subtilis, rescued the deficiency in biofilm formation by the wild type.

* Corresponding author. Mailing address: Department of Food Microbiology and Toxicology, Food Research Institute, University of Wisconsin, 1925 Willow Dr., Madison, WI 53706. Phone: (608) 263-1168. Fax: (608) 263-1114. E-mail: acwong{at}wisc.edu.

Applied and Environmental Microbiology, July 2006, p. 5089-5092, Vol. 72, No. 7
0099-2240/06/$08.00+0     doi:10.1128/AEM.00573-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



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Copyright © 2006 by the American Society for Microbiology. All rights reserved.