Inhibition of auxin signaling in Frankia species-infected cells in Casuarina glauca nodules leads to increased nodulation
| Autor: | Maïmouna Cissoko, Laurent Laplaze, Valérie Hocher, Issa Diedhiou, Elodie Pirolles, Hassen Gherbi, Mikaël Lucas, Jocelyne Bonneau, Daniel Moukouanga, Sergio Svistoonoff, Antony Champion, Hermann Prodjinoto, Amandine Crabos, Virginie Vaissayre, Alexandre Tromas, Claudine Franche |
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| Přispěvatelé: | Diversité, adaptation, développement des plantes (UMR DIADE), Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) |
| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
Root nodule Ntrogen-fixation Physiology [SDV]Life Sciences [q-bio] Frankia Cytokinin Expression Autoregulation Plant Science 01 natural sciences 03 medical and health sciences Symbiosis Auxin Botany Genetics [SDV.BV]Life Sciences [q-bio]/Vegetal Biology Origins 030304 developmental biology chemistry.chemical_classification 0303 health sciences biology Plant Root Nodulation fungi food and beverages 15. Life on land Genetic-basis biology.organism_classification Actinorhizal symbioses Allocasuarina-verticillata chemistry Nitrogen fixation Perception Plant hormone Actinorhizal plant 010606 plant biology & botany |
| Zdroj: | Plant Physiology Plant Physiology, American Society of Plant Biologists, 2015, 167 (3), pp.1149-1157. ⟨10.1104/pp.114.255307⟩ |
| ISSN: | 0032-0889 1532-2548 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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