Link to home

Oxidative Burst in Alfalfa-Sinorhizobium meliloti Symbiotic Interaction

January 2001 , Volume 14 , Number  1
Pages  86 - 89

Renata Santos , 1 Didier Hérouart , 2 Samuel Sigaud , 2 Danièle Touati , 1 and Alain Puppo 2

1Laboratoire de Génétique Moléculaire des Réponses Adaptatives, Institut Jacques Monod, CNRS-Universités Paris 6 and Paris 7, 2 place Jussieu 75251 Paris cedex 05, France; 2Laboratoire de Biologie Végétale et Microbiologie, CNRS ESA 6169, Université de Nice-Sophia Antipolis, 06108 Nice cedex 02, France

Go to article:
Accepted 11 October 2000.

Reactive oxygen species are produced as an early event in plant defense response against avirulent pathogens. We show here that alfalfa responds to infection with Sinorhizobium meliloti by production of superoxide and hydrogen peroxide. This similarity in the early response to infection by pathogenic and symbiotic bacteria addresses the question of which mechanism rhizobia use to counteract the plant defense response.

Additional keywords: hypersensitive response, nitrogen fixation, symbiosis.

© 2001 The American Phytopathological Society