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Applied and Environmental Microbiology, January 2007, p. 650-654, Vol. 73, No. 2
0099-2240/07/$08.00+0     doi:10.1128/AEM.01681-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Cross-Species GacA-Controlled Induction of Antibiosis in Pseudomonads{triangledown}

Christophe Dubuis and Dieter Haas*

Département de Microbiologie Fondamentale, Université de Lausanne, CH-1015 Lausanne, Switzerland

Received 19 July 2006/ Accepted 1 November 2006

Signal extracts prepared from culture supernatants of Pseudomonas fluorescens CHA0 and Pseudomonas aeruginosa PAO stimulated GacA-dependent expression of small RNAs and hence of antibiotic compounds in both hosts. Pseudomonas corrugata LMG2172 and P. fluorescens SBW25 also produced signal molecules stimulating GacA-controlled antibiotic synthesis in strain CHA0, illustrating a novel, N-acyl-homoserine lactone-independent type of interspecies communication.

* Corresponding author. Mailing address: Département de Microbiologie Fondamentale, Université de Lausanne, CH-1015 Lausanne, Switzerland. Phone: 41 21 692 56 31. Fax: 41 21 692 56 35. E-mail: Dieter.Haas{at}unil.ch.

{triangledown} Published ahead of print on 10 November 2006.

Applied and Environmental Microbiology, January 2007, p. 650-654, Vol. 73, No. 2
0099-2240/07/$08.00+0     doi:10.1128/AEM.01681-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.





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