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Four Genes of Medicago truncatula Controlling Components of a Nod Factor Transduction Pathway
TLDR
Mutant analysis provides evidence that Nod factors have a dual effect on the growth of root hair: inhibition of endogenous (plant) tip growth, and elicitation of a novel tip growth dependent on (bacterial) Nod factor responses. Expand
Fungal lipochitooligosaccharide symbiotic signals in arbuscular mycorrhiza
TLDR
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. Expand
The Medicago Genome Provides Insight into the Evolution of Rhizobial Symbioses
TLDR
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. Expand
A Putative Ca2+ and Calmodulin-Dependent Protein Kinase Required for Bacterial and Fungal Symbioses
TLDR
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). Expand
Rhizobium meliloti lipooligosaccharide nodulation factors: different structural requirements for bacterial entry into target root hair cells and induction of plant symbiotic developmental responses.
TLDR
Rhizobium meliloti produces lipochitooligosaccharide nodulation NodRm factors, which are clearly more stringent for bacterial entry than for the elicitation of developmental plant responses. Expand
Medicago truncatula DMI1 Required for Bacterial and Fungal Symbioses in Legumes
TLDR
The DMI1 (does not make infections) gene encodes a novel protein with low global similarity to a ligand-gated cation channel domain of archaea that is highly conserved in angiosperms and ancestral to land plants. Expand
The NFP locus of Medicago truncatula controls an early step of Nod factor signal transduction upstream of a rapid calcium flux and root hair deformation.
TLDR
Data indicate that the NFP locus controls an early step of Nod factor signal transduction, upstream of previously identified genes and specific to nodulation. Expand
A GRAS-Type Transcription Factor with a Specific Function in Mycorrhizal Signaling
TLDR
It is concluded that mycorrhizal signaling downstream of the symbiosis-signaling pathway has parallels with nodulation-specific signaling and functions to promote mycorRhizal colonization by regulating cutin biosynthesis. Expand
Rhizobium lipo-chitooligosaccharide nodulation factors: signaling molecules mediating recognition and morphogenesis.
TLDR
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. Expand
Transcriptional Responses toward Diffusible Signals from Symbiotic Microbes Reveal MtNFP- and MtDMI3-Dependent Reprogramming of Host Gene Expression by Arbuscular Mycorrhizal Fungal
TLDR
Comparative gene expression studies in symbiotic mutants demonstrated that transcriptional reprogramming by AM fungal LCOs strictly depends on MtNFP and largely requires MtDMI3, and signaling-related and transcription factor genes specifically up-regulated by Myc-LCOs were identified. Expand
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