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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
The Independent Acquisition of Plant Root Nitrogen-Fixing Symbiosis in Fabids Recruited the Same Genetic Pathway for Nodule Organogenesis
PLoS ONE, Volume 8, No. 5, Article e64515, Year 2013
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Description
Only species belonging to the Fabid clade, limited to four classes and ten families of Angiosperms, are able to form nitrogen-fixing root nodule symbioses (RNS) with soil bacteria. This concerns plants of the legume family (Fabaceae) and Parasponia (Cannabaceae) associated with the Gram-negative proteobacteria collectively called rhizobia and actinorhizal plants associated with the Gram-positive actinomycetes of the genus Frankia. Calcium and calmodulin-dependent protein kinase (CCaMK) is a key component of the common signaling pathway leading to both rhizobial and arbuscular mycorrhizal symbioses (AM) and plays a central role in cross-signaling between root nodule organogenesis and infection processes. Here, we show that CCaMK is also needed for successful actinorhiza formation and interaction with AM fungi in the actinorhizal tree Casuarina glauca and is also able to restore both nodulation and AM symbioses in a Medicago truncatula ccamk mutant. Besides, we expressed auto-active CgCCaMK lacking the auto-inhibitory/CaM domain in two actinorhizal species: C. glauca (Casuarinaceae), which develops an intracellular infection pathway, and Discaria trinervis (Rhamnaceae) which is characterized by an ancestral intercellular infection mechanism. In both species, we found induction of nodulation independent of Frankia similar to response to the activation of CCaMK in the rhizobia-legume symbiosis and conclude that the regulation of actinorhiza organogenesis is conserved regardless of the infection mode. It has been suggested that rhizobial and actinorhizal symbioses originated from a common ancestor with several independent evolutionary origins. Our findings are consistent with the recruitment of a similar genetic pathway governing rhizobial and Frankia nodule organogenesis. © 2013 Svistoonoff et al.
Available Materials
https://efashare.b-cdn.net/share/pmc/articles/PMC3669324/bin/pone.0064515.s001.pdf
https://efashare.b-cdn.net/share/pmc/articles/PMC3669324/bin/pone.0064515.s002.pdf
https://efashare.b-cdn.net/share/pmc/articles/PMC3669324/bin/pone.0064515.s003.pdf
https://efashare.b-cdn.net/share/pmc/articles/PMC3669324/bin/pone.0064515.s004.doc
Authors & Co-Authors
Svistoonoff, Sergio
France, Montpellier
Ird Centre de Montpellier
Benabdoun, Faiza Meriem
France, Montpellier
Ird Centre de Montpellier
Algeria, Constantine
Université Constantine 1
Nambiar-Veetil, M.
France, Montpellier
Ird Centre de Montpellier
India, Coimbatore
Institute of Forest Genetics and Tree Breeding India
Imanishi, Leandro
France, Montpellier
Ird Centre de Montpellier
Argentina, Bernal
Universidad Nacional de Quilmes
Vaissayre, Virginie
France, Montpellier
Ird Centre de Montpellier
Cesari, Stella
France, Montpellier
Ird Centre de Montpellier
France, Montpellier
Inrae's Occitanie-montpellier Centre
Diagne, Nathalie
France, Montpellier
Ird Centre de Montpellier
Senegal, Dakar
Centre Ird de Bel Air
Hocher, Valérie
France, Montpellier
Ird Centre de Montpellier
de Billy, Françoise
France, Paris
Cnrs Centre National de la Recherche Scientifique
Bonneau, Jocelyne
France, Montpellier
Ird Centre de Montpellier
Wall, Luis Gabriel
Argentina, Bernal
Universidad Nacional de Quilmes
Ykhlef, Nadia
Algeria, Constantine
Université Constantine 1
Rosenberg, Charles
France, Paris
Cnrs Centre National de la Recherche Scientifique
BOGUSZ, Didier
France, Montpellier
Ird Centre de Montpellier
Franche, Claudine
France, Montpellier
Ird Centre de Montpellier
Gherbi, Hassen
France, Montpellier
Ird Centre de Montpellier
Statistics
Citations: 68
Authors: 16
Affiliations: 7
Identifiers
Doi:
10.1371/journal.pone.0064515
e-ISSN:
19326203
Research Areas
Genetics And Genomics