A putative Ca2+ and calmodulin-dependent protein kinase required for bacterial and fungal symbioses |
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Authors: | Lévy Julien Bres Cécile Geurts René Chalhoub Boulos Kulikova Olga Duc Gérard Journet Etienne-Pascal Ané Jean-Michel Lauber Emmanuelle Bisseling Ton Dénarié Jean Rosenberg Charles Debellé Frédéric |
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Institution: | Laboratoire des Interactions Plantes-Microorganismes INRA-CNRS, BP27, 31326 Castanet-Tolosan Cedex, France. |
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Abstract: | Legumes can enter into symbiotic relationships with both nitrogen-fixing bacteria (rhizobia) and mycorrhizal fungi. Nodulation by rhizobia results from a signal transduction pathway induced in legume roots by rhizobial Nod factors. DMI3, a Medicago truncatula gene that acts immediately downstream of calcium spiking in this signaling pathway and is required for both nodulation and mycorrhizal infection, has high sequence similarity to genes encoding calcium and calmodulin-dependent protein kinases (CCaMKs). This indicates that calcium spiking is likely an essential component of the signaling cascade leading to nodule development and mycorrhizal infection, and sheds light on the biological role of plant CCaMKs. |
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