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Applied and Environmental Microbiology, January 2007, p. 327-330, Vol. 73, No. 1
0099-2240/07/$08.00+0     doi:10.1128/AEM.02027-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Rhizobium etli USDA9032 Engineered To Produce a Phenazine Antibiotic Inhibits the Growth of Fungal Pathogens but Is Impaired in Symbiotic Performance{triangledown}

Hari B. Krishnan,1,2* Beom Ryong Kang,3 Ammulu Hari Krishnan,2 Kil Yong Kim,3 and Young Cheol Kim3

Plant Genetics Research Unit, United States Department of Agriculture-Agricultural Research Service,1 Department of Agronomy, University of Missouri, Columbia, Missouri 65211,2 Environment-Friendly Agricultural Research Center, Chonnam National University, Gwangju 500-757, South Korea3

Received 26 August 2006/ Accepted 28 October 2006

Phenazine production was engineered in Rhizobium etli USDA9032 by the introduction of the phz locus of Pseudomonas chlororaphis O6. Phenazine-producing R. etli was able to inhibit the growth of Botrytis cinerea and Fusarium oxysporum in vitro. Black bean inoculated with phenazine-producing R. etli produced brownish Fix– nodules.

* Corresponding author. Mailing address: Plant Genetics Research Unit, USDA-ARS, 108W Curtis Hall, University of Missouri, Columbia, MO 65211. Phone: (573) 882-8151. Fax: (573) 884-7850. E-mail: KrishnanH{at}missouri.edu.

{triangledown} Published ahead of print on 3 November 2006.

Applied and Environmental Microbiology, January 2007, p. 327-330, Vol. 73, No. 1
0099-2240/07/$08.00+0     doi:10.1128/AEM.02027-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.





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