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Autoregulation dependent and independent mechanisms are responsible for the systemic control of nodule formation by the plant N demand
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- In legumes interacting with rhizobia the formation of symbiotic organs responsible for the acquisition of atmospheric nitrogen is depending of the plant nitrogen (N) demand. We discriminated between local and systemic impact of nitrogen on nodule formation using Medicago truncatula plants cultivated in split-root systems. We obtained evidence of the control of nodule formation by whole plant systemic N-satisfaction signaling but obtained little evidence of a local control by mineral nitrogen. We characterized the impact of systemic N signaling on the root transcriptome reprogramming associated to nodule formation. We identified, large genes clusters displaying common expression profiles in response to systemic N signaling enriched in particular fonctions required during these biological processes. We found evidence of a strong effect of SUNN in the control by systemic N signaling of many genes involved in the early interaction with rhizobium as well as organogenesis supporting a role of autoregulation pathway in systemic N signaling. However, we also found evidence that major SUNN independent systemic N signaling controls were maintained in the mutant. This study shed light on the unexpected high complexity of the control of nodule formation by systemic N signaling, that probably involves multiple pathways.
- Subjects :
- 2. Zero hunger
0106 biological sciences
0303 health sciences
biology
[SDV]Life Sciences [q-bio]
Mutant
food and beverages
Organogenesis
biology.organism_classification
01 natural sciences
Medicago truncatula
Rhizobia
Cell biology
[SDV] Life Sciences [q-bio]
Transcriptome
03 medical and health sciences
Rhizobium
Autoregulation
Gene
030304 developmental biology
010606 plant biology & botany
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....bcd9ef04cfc17b18dce4316b93809575