Nitrate sensing through NLP7-NIGT1.3 regulates iron deficiency responses and growth trade-offs in Arabidopsis.

Nitrate acts as a key signaling molecule in Arabidopsis, regulating iron deficiency responses via NLP7 and NIGT1.3, affecting plant growth and stress adaptation.

• Why it matters: Understanding how nitrate influences iron deficiency responses is crucial because nitrate fertilizers worsen Fe deficiency symptoms, yet the signaling mechanisms remain unclear, limiting strategies to improve plant resilience.
• What they did: The study used molecular, transcriptomic, and genetic approaches to show that nitrate-dependent NLP7 nuclear accumulation controls Fe uptake gene expression and identifies NIGT1.3 as a direct NLP7 target, forming a regulatory cascade.
• The result: Findings reveal that the NLP7-NIGT1.3 module mediates a growth-stress trade-off under Fe deficiency, enabling plants to balance stress responses with growth, offering insights into nutrient signaling and stress management.