Long-distance transport of signals during symbiosis: are nodule formation and mycorrhization autoregulated in a similar way?

Legumes enter nodule symbioses with nitrogen-fixing bacteria (rhizobia), whereas most flowering plants establish symbiotic associations with arbuscular mycorrhizal (AM) fungi. Once first steps of symbiosis are initiated, nodule formation and mycorrhization in legumes is negatively controlled by a sh...

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Bibliographic Details
Published in:Plant signaling & behavior 2011-03, Vol.6 (3), p.372-377
Main Authors: Staehelin, Christian, Xie, Zhi-Ping, Illana, Antonio, Vierheilig, Horst
Format: Article
Language:English
Subjects:
Angiospermae
autoregulation
Binding
Biology
Bioscience
Calcium
Cancer
Cell
Cycle
Fabaceae - genetics
Fabaceae - metabolism
Fabaceae - microbiology
Gene Expression Regulation, Plant - genetics
Gene Expression Regulation, Plant - physiology
Host-Pathogen Interactions
host-pathogen relationships
Landes
legumes
Models, Biological
Mycorrhizae - physiology
mycorrhizal fungi
nitrogen-fixing bacteria
nodulation
Organogenesis
peptides
phosphotransferases (kinases)
Proteins
Review
Signal Transduction - genetics
Signal Transduction - physiology
Symbiosis - genetics
Symbiosis - physiology
systemic acquired resistance
vesicular arbuscular mycorrhizae
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Summary:Legumes enter nodule symbioses with nitrogen-fixing bacteria (rhizobia), whereas most flowering plants establish symbiotic associations with arbuscular mycorrhizal (AM) fungi. Once first steps of symbiosis are initiated, nodule formation and mycorrhization in legumes is negatively controlled by a shoot-derived inhibitor (SDI), a phenomenon termed autoregulation. According to current views, autoregulation of nodulation and mycorrhization in legumes is regulated in a similar way. CLE peptides induced in response to rhizobial nodulation signals (Nod factors) have been proposed to represent the ascending long-distance signals to the shoot. Although not proven yet, these CLE peptides are likely perceived by leucine-rich repeat (LRR) autoregulation receptor kinases in the shoot. Autoregulation of mycorrhization in non-legumes is reminiscent to the phenomenon of "systemic acquired resistance" in plant-pathogen interactions.
ISSN:1559-2316
1559-2324
1559-2324
DOI:10.4161/psb.6.3.13881