Jean Dénarié

TL;DR: The draft sequence of the M. truncatula genome sequence is described, a close relative of alfalfa (Medicago sativa), a widely cultivated crop with limited genomics tools and complex autotetraploid genetics, which provides significant opportunities to expand al falfa’s genomic toolbox.

TL;DR: Using R. meliloti strains overproducing symbiotic Nod factors, the major alfalfa-specific signal, NodRm-1, is purified by gel permeation, ion exchange and C18 reverse-phase high performance liquid chromatography and elicited root hair deformation on the homologous host when added in nanomolar concentration.

TL;DR: This review summarizes the current knowledge on the biosynthesis, structure, and function of this new class of signaling molecules and discusses the possibility that these signals could be part of a new family of plant lipo-chitooligosaccharide growth regulators.

TL;DR: It is shown that Glomus intraradices secretes symbiotic signals that are a mixture of sulphated and non-sulphated simple lipochitooligosaccharides (LCOs), which stimulate formation of AM in plant species of diverse families and in the legume Medicago truncatula these signals stimulate root growth and branching by the symbiotic DMI signalling pathway.

TL;DR: In this paper, DMI3, a Medicago truncatula gene that acts immediately downstream of calcium spiking in this signaling pathway and is required for both nodulation and mycorrhizal infection, has high sequence similarity to genes encoding calcium and calmodulin-dependent protein kinases (CCaMKs).