Nod factor-independent nodulation in Aeschynomene evenia required the common plant-microbe symbiotic toolkit

Fabre Sandrine, Gully Djamel, Poitout Arthur, Patrel Delphine, Arrighi Jean-François, Giraud Eric, Czernic Pierre, Cartieaux Fabienne. 2015. Nod factor-independent nodulation in Aeschynomene evenia required the common plant-microbe symbiotic toolkit. Plant Physiology, 169 (4) : 2654-2664.

Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/nuccore/KT248236 / Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/nuccore/KT248237 / Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/nuccore/KT248238

Quartile : Outlier, Sujet : PLANT SCIENCES

Résumé : Nitrogen fixation in the legume-rhizobium symbiosis is a crucial area of research for more sustainable agriculture. Our knowledge of the plant cascade in response to the perception of bacterial Nod factors has increased in recent years. However, the discovery that Nod factors are not involved in the Aeschynomene-Bradyrhizobium spp. interaction suggests that alternative molecular dialogues may exist in the legume family. We evaluated the conservation of the signaling pathway common to other endosymbioses using three candidate genes: Ca2+/Calmodulin-Dependent Kinase (CCaMK), which plays a central role in cross signaling between nodule organogenesis and infection processes; and Symbiosis Receptor Kinase (SYMRK) and Histidine Kinase1 (HK1), which act upstream and downstream of CCaMK, respectively. We showed that CCaMK, SYMRK, and HK1 are required for efficient nodulation in Aeschynomene evenia. Our results demonstrate that CCaMK and SYMRK are recruited in Nod factor-independent symbiosis and, hence, may be conserved in all vascular plant endosymbioses described so far.

Mots-clés Agrovoc : Aeschynomene, symbiose, Fixation de l'azote, bactérie fixatrice de l'azote, mycorhization

Classification Agris : F61 - Physiologie végétale - Nutrition
F62 - Physiologie végétale - Croissance et développement

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Fabre Sandrine, CIRAD-BIOS-UMR RPB (FRA)
• Gully Djamel, IRD (FRA)
• Poitout Arthur, IRD (FRA)
• Patrel Delphine, IRD (FRA)
• Arrighi Jean-François, IRD (FRA)
• Giraud Eric, IRD (FRA)
• Czernic Pierre, IRD (FRA)
• Cartieaux Fabienne, IRD (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/586897/)

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