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Nitrogen Systemic Signaling: From Symbiotic Nodulation to Root Acquisition

Abstract : Plant nutrient acquisition is tightly regulated by resource availability and metabolic needs, implying the existence of communication between roots and shoots to ensure their integration at the whole-plant level. Here, we focus on systemic signaling pathways controlling nitrogen (N) nutrition, achieved both by the root import of mineral N and, in legume plants, through atmospheric N fixation by symbiotic bacteria inside dedicated root nodules. We explore features conserved between systemic pathways repressing or enhancing symbiotic N fixation and the regulation of mineral N acquisition by roots, as well as their integration with other environmental factors, such as phosphate, light, and CO2 availability.
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Contributor : Chantal Baracco <>
Submitted on : Monday, January 4, 2021 - 2:52:09 PM
Last modification on : Wednesday, June 2, 2021 - 4:26:07 PM



Pierre Gautrat, Carole Laffont, Florian Frugier, Sandrine Ruffel. Nitrogen Systemic Signaling: From Symbiotic Nodulation to Root Acquisition. Trends in Plant Science, Elsevier, 2021, 26 (4), pp.392-406. ⟨10.1016/j.tplants.2020.11.009⟩. ⟨hal-03094952⟩



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