Perrine Walker Francine, Doumas Patrick, Lucas Mikaël, Vaissayre Virginie, Beauchemin Nicolas, Band L. R., Chopard J., Crabos Amandine, Conejero G., Peret Benjamin, King J. R., Verdeil J. L., Hocher Valérie, Franche Claudine, Bennett M. J., Tisa L. S., Laplaze Laurent. (2010). Auxin carriers localization drives auxin accumulation in plant cells infected by Frankia in Casuarina glauca actinorhizal nodules. Plant Physiology, 154 (3), p. 1372-1380. ISSN 0032-0889.
Titre du document
Auxin carriers localization drives auxin accumulation in plant cells infected by Frankia in Casuarina glauca actinorhizal nodules
Année de publication
2010
Auteurs
Perrine Walker Francine, Doumas Patrick, Lucas Mikaël, Vaissayre Virginie, Beauchemin Nicolas, Band L. R., Chopard J., Crabos Amandine, Conejero G., Peret Benjamin, King J. R., Verdeil J. L., Hocher Valérie, Franche Claudine, Bennett M. J., Tisa L. S., Laplaze Laurent
Source
Plant Physiology, 2010,
154 (3), p. 1372-1380 ISSN 0032-0889
Actinorhizal symbioses are mutualistic interactions between plants and the soil bacteria Frankia that lead to the formation of nitrogen-fixing root nodules. Little is known about the signaling mechanisms controlling the different steps of the establishment of the symbiosis. The plant hormone auxin has been suggested to play a role. Here we report that auxin accumulates within Frankia-infected cells in actinorhizal nodules of Casuarina glauca. Using a combination of computational modeling and experimental approaches, we establish that this localized auxin accumulation is driven by the cell-specific expression of auxin transporters and by Frankia auxin biosynthesis in planta. Our results indicate that the plant actively restricts auxin accumulation to Frankia-infected cells during the symbiotic interaction.
Plan de classement
Sciences du monde végétal [076]
;
Biotechnologies [084]
Localisation
Fonds IRD [F B010052911]
Identifiant IRD
fdi:010052911
