title: Recent advances in actinorhizal symbiosis signaling.
abstract: Nitrogen and phosphorus availability are frequent limiting factors in plant growth and development. Certain bacteria and fungi form root endosymbiotic relationships with plants enabling them to exploit atmospheric nitrogen and soil phosphorus. The relationships between bacteria and plants include nitrogen-fixing Gram-negative proteobacteria called rhizobia that are able to interact with most leguminous plants (Fabaceae) but also with the non-legume Parasponia (Cannabaceae), and actinobacteria Frankia, which are able to interact with about 260 species collectively called actinorhizal plants. Fungi involved in the relationship with plants include Glomeromycota that form an arbuscular mycorrhizal (AM) association intracellularly within the roots of more than 80% of land plants. Increasing numbers of reports suggest that the rhizobial association with legumes has recycled part of the ancestral program used by most plants to interact with AM fungi. This review focuses on the most recent progress made in plant genetic control of root nodulation that occurs in non-legume actinorhizal plant species.
authors.affiliation: Equipe Rhizogenèse, UMR DIADE (IRD-UM), Institut de Recherche pour le Développement (IRD), 911 avenue Agropolis, BP 64501, 34394, Montpellier Cedex 5, France.
authors.forename: Emilie
authors.initials: E
authors.lastname: Froussart
authors.affiliation: Equipe Rhizogenèse, UMR DIADE (IRD-UM), Institut de Recherche pour le Développement (IRD), 911 avenue Agropolis, BP 64501, 34394, Montpellier Cedex 5, France.
authors.forename: Jocelyne
authors.initials: J
authors.lastname: Bonneau
authors.affiliation: Equipe Rhizogenèse, UMR DIADE (IRD-UM), Institut de Recherche pour le Développement (IRD), 911 avenue Agropolis, BP 64501, 34394, Montpellier Cedex 5, France. claudine.franche@ird.fr.
authors.forename: Claudine
authors.initials: C
authors.lastname: Franche
authors.affiliation: Equipe Rhizogenèse, UMR DIADE (IRD-UM), Institut de Recherche pour le Développement (IRD), 911 avenue Agropolis, BP 64501, 34394, Montpellier Cedex 5, France.
authors.forename: Didier
authors.initials: D
authors.lastname: Bogusz
mesh_terms: D007887:Fabaceae / Q000382:microbiology* / Q000502:physiology; D040161:Frankia / Q000502:physiology*; D007210:Indoleacetic Acids / Q000378:metabolism; D038821:Mycorrhizae / Q000502:physiology; D009586:Nitrogen Fixation; D055170:Plant Root Nodulation; D018517:Plant Roots / Q000382:microbiology* / Q000502:physiology; D012231:Rhizobium; D058441:Rhizosphere; D015398:Signal Transduction; D013559:Symbiosis / Q000502:physiology*
chemical_list: D007210:Indoleacetic Acids
keywords: Actinorhizal plants; Frankia; Nitrogen-fixing root nodule symbiosis; Nodulation; Rhizobia; Signaling