Role of Nitric Oxide of Bacterial Origin in the Medicago truncatula–Sinorhizobium meliloti Symbiosis - Archive ouverte HAL Access content directly
Journal Articles Molecular Plant-Microbe Interactions Year : 2022

Role of Nitric Oxide of Bacterial Origin in the Medicago truncatula–Sinorhizobium meliloti Symbiosis

(1) , (1) , (2) , (1) , (1)
1
2

Abstract

Nitric oxide (NO) is a small ubiquitous gaseous molecule that has been found in many host-pathogen interactions. NO has been shown to be part of the defense arsenal of animal cells and more recently of plant cells. To fight this molecular weapon, pathogens have evolved responses consisting of adaptation to NO or degradation of this toxic molecule. More recently, it was shown that NO could also be produced by the pathogen and contributes likewise to the success of the host cell infection. NO is also present during symbiotic interactions. Despite growing knowledge about the role of NO during friendly interactions, data on the specificity of action of NO produced by each partner are scarce, partly due to the multiplicity of NO production systems. In the nitrogen-fixing symbiosis between the soil bacterium Sinorhizobium meliloti and the model legume Medicago truncatula, NO has been detected at all steps of the interaction, where it displays various roles. Both partners contribute to NO production inside the legume root nodules where nitrogen fixation occurs. The study focuses on the role of bacterial NO in this interaction. We used a genetic approach to identify bacterial NO sources in the symbiotic context and to test the phenotype in planta of bacterial mutants affected in NO production. Our results show that only denitrification is a source of bacterial NO in Medicago nodules, giving insight into the role of bacteria-derived NO at different steps of the symbiotic interaction.
Fichier principal
Vignette du fichier
Ruiz-MPMI-2022.pdf (1.53 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
licence : CC BY NC ND - Attribution - NonCommercial - NoDerivatives

Dates and versions

hal-03853410 , version 1 (15-11-2022)

Licence

Attribution - NonCommercial - NoDerivatives - CC BY 4.0

Identifiers

Cite

Bryan Ruiz, Laurent Sauviac, Renaud Brouquisse, Claude Bruand, Eliane Meilhoc. Role of Nitric Oxide of Bacterial Origin in the Medicago truncatula–Sinorhizobium meliloti Symbiosis. Molecular Plant-Microbe Interactions, 2022, 35 (10), pp.887-892. ⟨10.1094/MPMI-05-22-0118-SC⟩. ⟨hal-03853410⟩
0 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More