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Journal of Bacteriology, November 2009, p. 7129-7133, Vol. 191, No. 22
0021-9193/09/$08.00+0     doi:10.1128/JB.00905-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Laboratory Strains of Bacillus subtilis Do Not Exhibit Swarming Motility{triangledown} ,{dagger}

Joyce E. Patrick and Daniel B. Kearns*

Indiana University, Department of Biology, 1001 East Third Street, Bloomington, Indiana 47405

Received 11 July 2009/ Accepted 5 August 2009

We redemonstrate that SwrA is essential for swarming motility in Bacillus subtilis, and we reassert that laboratory strains of B. subtilis do not swarm. Additionally, we find that a number of other genes, previously reported to be required for swarming in laboratory strains, are dispensable for robust swarming motility in an undomesticated strain. We attribute discrepancies in the literature to a lack of reproducible standard experimental conditions, selection for spontaneous swarming suppressors, inadvertent genetic linkage to swarming mutations, and auxotrophy.

* Corresponding author. Mailing address: Indiana University, Department of Biology, 1001 East Third Street, Bloomington, IN 47405. Phone: (812) 856-2523. Fax: (812) 855-6705. E-mail: dbkearns{at}indiana.edu

{triangledown} Published ahead of print on 11 September 2009.

{dagger} Supplemental material for this article may be found at http://jb.asm.org/.

Journal of Bacteriology, November 2009, p. 7129-7133, Vol. 191, No. 22
0021-9193/09/$08.00+0     doi:10.1128/JB.00905-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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