ArticleJournal of experimental botany2020
Responses of mature symbiotic nodules to the whole-plant systemic nitrogen signaling.
Article in Journal of experimental botany, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 33 citations in OpenAlex.
- Functional divergence and symbiotic significance of nitrate reductase isoforms in Medicago truncatula.Plant physiology · 2026Article
- The indirect effect of nitrate on the soybean nodule growth and nitrogen fixation activity in relation to carbon supply.BMC plant biology · 2025Article
- Defense and senescence interplay in legume nodules.Plant communications · 2024Review
- Nitrogen deficiency modulates carbon allocation to promote nodule nitrogen fixation capacity in soybean.Exploration (Beijing, China) · 2024Article
- Mineral and Carbon Metabolic Adjustments in Nodules of Symbiotically Grown Faba Bean (Plants (Basel, Switzerland) · 2023Article
- Plant latent defense response against compatibility.The ISME journal · 2023Review
- Nodule-specific energy sensors determine symbiotic nitrogen fixation by regulating phosphoenolpyruvate allocation.Science China. Life sciences · 2023Article
- Insight into the control of nodule immunity and senescence during Medicago truncatula symbiosis.Plant physiology · 2023Article
- Control of the rhizobium-legume symbiosis by the plant nitrogen demand is tightly integrated at the whole plant level and requires inter-organ systemic signaling.Frontiers in plant science · 2023Review
- Localized osmotic stress activates systemic responses to N limitation inFrontiers in plant science · 2023Article
- Systemic regulation of nodule structure and assimilated carbon distribution by nitrate in soybean.Frontiers in plant science · 2023Article
- How Rhizobia Adapt to the Nodule Environment.Journal of bacteriology · 2021Article
- Conditional sanctioning in a legume-Proceedings of the National Academy of Sciences of the United States of America · 2021Article
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Authors and funding
11 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In symbiotic root nodules of legumes, terminally differentiated rhizobia fix atmospheric N2 producing an NH4+ influx that is assimilated by the plant. The plant, in return, provides photosynthates that fuel the symbiotic nitrogen acquisition. Mechanisms responsible for the adjustment of the symbiotic capacity to the plant N demand remain poorly understood. We have investigated the role of systemic signaling of whole-plant N demand on the mature N2-fixing nodules of the model symbiotic association Medicago truncatula/Sinorhizobium using split-root systems. The whole-plant N-satiety signaling rapidly triggers reductions of both N2 fixation and allocation of sugars to the nodule. These responses are associated with the induction of nodule senescence and the activation of plant defenses against microbes, as well as variations in sugars transport and nodule metabolism. The whole-plant N-deficit responses mirror these changes: a rapid increase of sucrose allocation in response to N-deficit is associated with a stimulation of nodule functioning and development resulting in nodule expansion in the long term. Physiological, transcriptomic, and metabolomic data together provide evidence for strong integration of symbiotic nodules into whole-plant nitrogen demand by systemic signaling and suggest roles for sugar allocation and hormones in the signaling mechanisms.
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