|Publication Type:||Journal Article|
|Year of Publication:||2010|
|Authors:||Perrine-Walker, F, Doumas, P, LUCAS, MIKAËL, Vaissayre, V, Beauchemin, NJ, Band, LR, Chopard, J, Crabos, A, Conejero, G, Péret, B, King, JR, Verdeil, J-L, Hocher, V, Franche, C, Bennett, MJ, Tisa, LS, Laplaze, L|
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.
|Short Title:||Plant Physiology|
Auxin Carriers Localization Drives Auxin Accumulation in Plant Cells Infected by Frankia in Casuarina glauca Actinorhizal Nodules