Speak, friend, and enter: signalling systems that promote beneficial symbiotic associations in plants
- G. Oldroyd
- Environmental ScienceNature Reviews Microbiology
- 1 April 2013
This Review describes the common signalling processes used by plants during mutualistic interactions with microorganisms as diverse as arbuscular mycorrhizal fungi and rhizobial bacteria.
The Medicago Genome Provides Insight into the Evolution of Rhizobial Symbioses
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.
Coordinating nodule morphogenesis with rhizobial infection in legumes.
This review focuses on the tissue-specific nature of the developmental processes associated with nodulation and the mechanisms by which these processes are coordinated during the formation of a nodule.
The rules of engagement in the legume-rhizobial symbiosis.
The mechanisms by which the plant allows bacterial infection and promotes the formation of the nodule are reviewed, as well as the details of how a complex interchange of metabolites and regulatory peptides force the bacteria into a nitrogen-fixing organelle-like state are reviewed.
Nodulation Signaling in Legumes Requires NSP2, a Member of the GRAS Family of Transcriptional Regulators
Evidence that a GRAS protein transduces calcium signals in plants and provides a possible regulator of Nod-factor–inducible gene expression is provided.
Medicago truncatula NIN Is Essential for Rhizobial-Independent Nodule Organogenesis Induced by Autoactive Calcium/Calmodulin-Dependent Protein Kinase1
- J. Marsh, Alexandra Rakocevic, G. Oldroyd
- Biology, Environmental SciencePlant Physiology
- 16 March 2007
It is shown here that MtNIN is essential for autoactive calcium/calmodulin-dependent protein kinase-induced nodule organogenesis, and that HCL is not required in this process.
Tomato Prf Is a Member of the Leucine-Rich Repeat Class of Plant Disease Resistance Genes and Lies Embedded within the Pto Kinase Gene Cluster
Medicago truncatula DMI1 Required for Bacterial and Fungal Symbioses in Legumes
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.
Data indicate that the NFP locus controls an early step of Nod factor signal transduction, upstream of previously identified genes and specific to nodulation.
GRAS Proteins Form a DNA Binding Complex to Induce Gene Expression during Nodulation Signaling in Medicago truncatula[W]
- Sibylle Hirsch, Jiyoung Kim, A. Muñoz, A. Heckmann, J. Downie, G. Oldroyd
- BiologyThe Plant Cell Online
- 1 February 2009
It is shown that NSP1 and NSP2 form a complex that is associated with the promoters of early nodulin genes, and direct binding of a GRAS protein complex to DNA is revealed and highlights the importance of the NSP-NSP2 complex for efficient nodulation in the model legume Medicago truncatula.