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Journal of Bacteriology, December 2007, p. 8741-8745, Vol. 189, No. 23
0021-9193/07/$08.00+0     doi:10.1128/JB.01130-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

H2O2 Is Required for Optimal Establishment of the Medicago sativa/Sinorhizobium meliloti Symbiosis{triangledown}

Alexandre Jamet,{dagger} Karine Mandon, Alain Puppo, and Didier Hérouart*

Interactions Plantes-Microorganismes et Santé Végétale, UMR IPMSV INRA 1064 - CNRS 6192, Université de Nice—Sophia Antipolis, Centre Sophia Agrobiotech, 400 route des chappes, BP 167, F-06903 Sophia Antipolis, France

Received 18 July 2007/ Accepted 20 September 2007

The symbiotic interaction between Medicago sativa and Sinorhizobium meliloti RmkatB++ overexpressing the housekeeping catalase katB is delayed, and this delay is combined with an enlargement of infection threads. This result provides evidence that H2O2 is required for optimal progression of infection threads through the root hairs and plant cell layers.

* Corresponding author. Mailing address: Interactions Plantes-Microorganismes et Santé Végétale, UMR IPMSV INRA 1064 - CNRS 6192, Université de Nice—Sophia Antipolis, Centre Sophia Agrobiotech, 400 route des chappes, BP 167, F-06903 Sophia Antipolis, France. Phone: (33) 492 38 66 36. Fax: (33) 492 38 66 40. E-mail: herouart{at}unice.fr

{triangledown} Published ahead of print on 5 October 2007.

{dagger} Present address: Unité de Recherche en Biologie Moléculaire (URBM), Facultés Universitaires Notre-Dame de la Paix, rue de Bruxelles 61, B-5000 Namur, Belgium.

Journal of Bacteriology, December 2007, p. 8741-8745, Vol. 189, No. 23
0021-9193/07/$08.00+0     doi:10.1128/JB.01130-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Chang, C., Damiani, I., Puppo, A., Frendo, P. (2009). Redox Changes during the Legume-Rhizobium Symbiosis. Mol Plant 2: 370-377 [Abstract] [Full Text]  


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