Coordinating nodule morphogenesis with rhizobial infection in legumes.
- G. Oldroyd, J. Downie
- BiologyAnnual Review of Plant Biology
- 29 April 2008
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.
- G. Oldroyd, J. Murray, P. Poole, J. Downie
- BiologyAnnual Review of Genetics
- 7 November 2011
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
- P. Kaló, C. Gleason, G. Oldroyd
- BiologyScience
- 17 June 2005
Evidence that a GRAS protein transduces calcium signals in plants and provides a possible regulator of Nod-factor–inducible gene expression is provided.
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.
A Ca2+/calmodulin-dependent protein kinase required for symbiotic nodule development: Gene identification by transcript-based cloning.
- R. Mitra, C. Gleason, S. Long
- BiologyProceedings of the National Academy of Sciences…
- 30 March 2004
The identification of the DMI3 gene is reported, using a gene cloning method based on transcript abundance, and it is shown that transcript-based cloning is a valid approach for cloning genes in barley, indicating the value of this technology in crop plants.
The Root Hair “Infectome” of Medicago truncatula Uncovers Changes in Cell Cycle Genes and Reveals a Requirement for Auxin Signaling in Rhizobial Infection[W][OPEN]
- A. Breakspear, Chengwu Liu, J. Murray
- BiologyThe Plant Cell
- 1 December 2014
It is concluded that the onset of infection is associated with reactivation of the cell cycle as well as increased expression of genes required for hormone and flavonoid biosynthesis and that the regulation of auxin signaling is necessary for initiation of rhizobial infection threads.
Amino-acid cycling drives nitrogen fixation in the legume–Rhizobium symbiosis
It is shown that a more complex amino-acid cycle is essential for symbiotic nitrogen fixation by Rhizobium in pea nodules: the plant provides amino acids to the bacteroids, enabling them to shut down their ammonium assimilation.
Differential and chaotic calcium signatures in the symbiosis signaling pathway of legumes
- S. Kosuta, S. Hazledine, G. Oldroyd
- BiologyProceedings of the National Academy of Sciences
- 15 July 2008
It is discovered that both bacterial-induced and fungal-induced calcium responses are chaotic in nature, consistent with the need to transduce two different signals, one from rhizobial bacteria and one from mycorrhizal fungi, by using common components of a single signaling pathway.
Dissection of nodulation signaling using pea mutants defective for calcium spiking induced by nod factors and chitin oligomers.
- S. Walker, V. Viprey, J. Downie
- Biology, MedicineProceedings of the National Academy of Sciences…
- 21 November 2000
A model for the potential order of pea nodulation genes in nodulation and mycorrhizal signaling is proposed, and seven loci that affect early stages of the symbiosis are analyzed.
The roles of extracellular proteins, polysaccharides and signals in the interactions of rhizobia with legume roots.
- J. Downie
- BiologyFEMS Microbiology Reviews
- 1 March 2010
This review summarizes many of the aspects of the extracellular biology of rhizobia, in particular in relation to their symbiotic interaction with legumes.
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