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Applied and Environmental Microbiology, July 2008, p. 4218-4221, Vol. 74, No. 13
0099-2240/08/$08.00+0     doi:10.1128/AEM.02244-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Response of Sinorhizobium meliloti to Elevated Concentrations of Cadmium and Zinc{triangledown} ,{dagger}

Silvia Rossbach,1* Danielle J. Mai,1 Eric L. Carter,1 Laurent Sauviac,2 Delphine Capela,2 Claude Bruand,2 and Frans J. de Bruijn2

Department of Biological Sciences, Western Michigan University, Kalamazoo, Michigan 49008-5410,1 Laboratoire des Interactions Plantes-Microorganismes, UMR INRA 441-CNRS 2594, F-31326 Castanet-Tolosan, France2

Received 2 October 2007/ Accepted 29 April 2008

Whole-genome transcriptional profiling was used to identify genes in Sinorhizobium meliloti 1021 that are differentially expressed during exposure to elevated concentrations of cadmium and zinc. Mutant strains with insertions in metal-regulated genes and in genes encoding putative metal efflux pumps were analyzed for their metal sensitivities, revealing a crucial role for the SMc04128-encoded P-type ATPase in the defense of S. meliloti against cadmium and zinc stress.

* Corresponding author. Mailing address: Department of Biological Sciences, Western Michigan University, Kalamazoo, MI 49008-5410. Phone: (269) 387-5868. Fax: (269) 387-5609. E-mail: Silvia.Rossbach{at}wmich.edu

{triangledown} Published ahead of print on 9 May 2008.

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

Applied and Environmental Microbiology, July 2008, p. 4218-4221, Vol. 74, No. 13
0099-2240/08/$08.00+0     doi:10.1128/AEM.02244-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





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