Article first published online: 13 MAY 2013
No claim to original French goverment works New Phytologist © 2013 New Phytologist Trust
Volume 199, Issue 1, pages 59–65, July 2013
How to Cite
Delaux, P.-M., Bécard, G. and Combier, J.-P. (2013), NSP1 is a component of the Myc signaling pathway. New Phytologist, 199: 59–65. doi: 10.1111/nph.12340
- Issue published online: 28 MAY 2013
- Article first published online: 13 MAY 2013
- Manuscript Accepted: 23 APR 2013
- Manuscript Received: 3 APR 2013
- AM symbiosis;
- GRAS transcription factor;
- Medicago truncatula ;
- SYM pathway
- Nodulation and arbuscular mycorrhization require the activation of plant host symbiotic programs by Nod factors, and Myc-LCOs and COs, respectively. The pathways involved in the perception and downstream signaling of these signals include common and distinct components. Among the distinct components, NSP1, a GRAS transcription factor, has been considered for years to be specifically involved in nodulation.
- Here, we analyzed the degree of conservation of the NSP1 sequence in arbuscular mycorrhizal (AM) host and non-AM host plants and carefully examined the ability of Medicago truncatula nsp1 mutants to respond to Myc-LCOs and to be colonized by an arbuscular mycorrhizal fungus.
- In AM-host plants, the selection pressure on NSP1 is stronger than in non-AM host ones. The response to Myc-LCOs and the frequency of mycorrhizal colonization are significantly reduced in the nsp1 mutants.
- Our results reveal that NSP1, previously described for its involvement in the Nod factor signaling pathway, is also involved in the Myc-LCO signaling pathway. They bring additional evidence on the evolutionary relatedness between nodulation and mycorrhization.