Fungal lipochitooligosaccharide symbiotic signals in arbuscular mycorrhiza
- F. Maillet, V. Poinsot, J. Dénarié
- Environmental ScienceNature
- 6 January 2011
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.
Four Genes of Medicago truncatula Controlling Components of a Nod Factor Transduction Pathway
- R. Catoira, C. Galera, J. Dénarié
- BiologyThe Plant Cell
- 1 September 2000
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.
The Medicago Genome Provides Insight into the Evolution of Rhizobial Symbioses
- N. Young, F. Debellé, B. Roe
- BiologyNature
- 18 October 2011
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.
A Putative Ca2+ and Calmodulin-Dependent Protein Kinase Required for Bacterial and Fungal Symbioses
- J. Levy, C. Bres, F. Debellé
- BiologyScience
- 27 February 2004
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).
Rhizobium meliloti lipooligosaccharide nodulation factors: different structural requirements for bacterial entry into target root hair cells and induction of plant symbiotic developmental responses.
- M. Ardourel, N. Demont, G. Truchet
- BiologyThe Plant Cell
- 1 October 1994
Rhizobium meliloti produces lipochitooligosaccharide nodulation NodRm factors, which are clearly more stringent for bacterial entry than for the elicitation of developmental plant responses.
Medicago truncatula DMI1 Required for Bacterial and Fungal Symbioses in Legumes
- Jean-Michel Ané, G. Kiss, D. Cook
- BiologyScience
- 27 February 2004
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.
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.
- B. B. Amor, S. Shaw, C. Gough
- Biology, Environmental ScienceThe Plant Journal
- 1 May 2003
Data indicate that the NFP locus controls an early step of Nod factor signal transduction, upstream of previously identified genes and specific to nodulation.
A GRAS-Type Transcription Factor with a Specific Function in Mycorrhizal Signaling
- Enrico Gobbato, J. Marsh, G. Oldroyd
- BiologyCurrent Biology
- 4 December 2012
Rhizobium lipo-chitooligosaccharide nodulation factors: signaling molecules mediating recognition and morphogenesis.
- J. Dénarié, F. Debellé, J. Promé
- BiologyAnnual Review of Biochemistry
- 1996
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.
Genetic analysis of calcium spiking responses in nodulation mutants of Medicago truncatula.
The symbiotic interaction between Medicago truncatula and Sinorhizobium meliloti results in the formation of nitrogen-fixing nodules on the roots of the host plant, and the possible role of calcium spiking in the nodulation response is assessed.
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