title: NIN Is Involved in the Regulation of Arbuscular Mycorrhizal Symbiosis.
abstract: Arbuscular mycorrhizal (AM) symbiosis is an intimate and ancient symbiosis found between most of terrestrial plants and fungi from theGlomeromycotafamily. Later during evolution, the establishment of the nodulation between legume plants and soil bacteria known as rhizobia, involved several genes of the signaling pathway previously implicated for AM symbiosis. For the past years, the identification of the genes belonging to this Common Symbiotic Signaling Pathway have been mostly done on nodulation. Among the different genes already well identified as required for nodulation, we focused our attention on the involvement of Nodule Inception (NIN) in AM symbiosis. We show here thatNINexpression is induced during AM symbiosis, and that theMedicago truncatula ninmutant is less colonized than the wild-typeM. truncatulastrain. Moreover,ninmutant displays a defect in the ability to be infected by the fungusRhizophagus irregularis. This work brings a new evidence of the common genes involved in overlapping signaling pathways of both nodulation and in AM symbiosis.
authors.affiliation: Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, Centre National de la Recherche Scientifique, Unités Propres de Service Castanet Tolosan, France.
authors.forename: Bruno
authors.initials: B
authors.lastname: Guillotin
authors.affiliation: Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, Centre National de la Recherche Scientifique, Unités Propres de Service Castanet Tolosan, France.
authors.forename: Jean-Malo
authors.initials: JM
authors.lastname: Couzigou
authors.affiliation: Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, Centre National de la Recherche Scientifique, Unités Propres de Service Castanet Tolosan, France.
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Combier
keywords: Medicago truncatula; Nodule Inception (NIN); Rhizophagus irregularis; arbuscular mycorrhiza; common symbiotic signaling pathway (CSSP); infection; symbiosis