Auxin carriers localization drives auxin accumulation in plant cells infected by Frankia in Casuarina glauca actinorhizal nodules. - Institut Agro Montpellier Accéder directement au contenu
Article Dans Une Revue Plant Physiology Année : 2010

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

Résumé

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.
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Dates et versions

hal-00554754 , version 1 (31-05-2020)

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Francine Perrine-Walker, Patrick Doumas, Mikael Lucas, Virginie Vaissayre, Nicholas J Beauchemin, et al.. Auxin carriers localization drives auxin accumulation in plant cells infected by Frankia in Casuarina glauca actinorhizal nodules.. Plant Physiology, 2010, 154 (3), pp.1372-80. ⟨10.1104/pp.110.163394⟩. ⟨hal-00554754⟩
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