Champion Antony, Lucas Mikaël, Tromas Alexandre, Vaissayre Virginie, Crabos Amandine, Diedhiou I., Prodjinoto H., Moukouanga Daniel, Pirolles Elodie, Cissoko M., Bonneau Jocelyne, Gherbi Hassen, Franche Claudine, Hocher Valérie, Svistoonoff Sergio, Laplaze Laurent. (2015). Inhibition of auxin signaling in Frankia species-infected cells in Casuarina glauca nodules leads to increased nodulation. Plant Physiology, 167 (3), p. 1149-1157. ISSN 0032-0889.
Titre du document
Inhibition of auxin signaling in Frankia species-infected cells in Casuarina glauca nodules leads to increased nodulation
Année de publication
2015
Auteurs
Champion Antony, Lucas Mikaël, Tromas Alexandre, Vaissayre Virginie, Crabos Amandine, Diedhiou I., Prodjinoto H., Moukouanga Daniel, Pirolles Elodie, Cissoko M., Bonneau Jocelyne, Gherbi Hassen, Franche Claudine, Hocher Valérie, Svistoonoff Sergio, Laplaze Laurent
Source
Plant Physiology, 2015,
167 (3), p. 1149-1157 ISSN 0032-0889
Actinorhizal symbioses are mutualistic interactions between plants and the soil bacteria Frankia spp. that lead to the formation of nitrogen-fixing root nodules. The plant hormone auxin has been suggested to play a role in the mechanisms that control the establishment of this symbiosis in the actinorhizal tree Casuarina glauca. Here, we analyzed the role of auxin signaling in Frankia spp.-infected cells. Using a dominant-negative version of an endogenous auxin-signaling regulator, INDOLE-3-ACETIC ACID7, we established that inhibition of auxin signaling in these cells led to increased nodulation and, as a consequence, to higher nitrogen fixation per plant even if nitrogen fixation per nodule mass was similar to that in the wild type. Our results suggest that auxin signaling in Frankia spp.-infected cells is involved in the long-distance regulation of nodulation in actinorhizal symbioses.
Plan de classement
Sciences du monde végétal [076]
;
Biotechnologies [084]
Localisation
Fonds IRD [F B010064640]
Identifiant IRD
fdi:010064640
