Auxin carriers localization drives auxin accumulation in plant cells infected by Frankia in Casuarina glauca actinorhizal nodules.

Academic Article


  • 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.
  • Authors

  • Perrine-Walker, Francine
  • Doumas, Patrick
  • Lucas, Mikael
  • Vaissayre, Virginie
  • Beauchemin, Nicholas J
  • Band, Leah R
  • Chopard, Jérome
  • Crabos, Amandine
  • Conejero, Geneviève
  • Péret, Benjamin
  • King, John R
  • Verdeil, Jean-Luc
  • Hocher, Valérie
  • Franche, Claudine
  • Bennett, Malcolm J
  • Tisa, Louis
  • Laplaze, Laurent
  • Status

    Publication Date

  • November 2010
  • Published In

  • Plant Physiology  Journal
  • Keywords

  • Carrier Proteins
  • Computational Biology
  • Frankia
  • Gene Expression Profiling
  • Indoleacetic Acids
  • Magnoliopsida
  • Models, Biological
  • Molecular Sequence Data
  • Plant Proteins
  • Root Nodules, Plant
  • Symbiosis
  • Digital Object Identifier (doi)

    Start Page

  • 1372
  • End Page

  • 1380
  • Volume

  • 154
  • Issue

  • 3