Plant Nutrient Homeostasis In A Rising CO2 World.

Elevated atmospheric CO2 is linked to lower concentrations of essential macro- and micronutrients in crop edible parts, reflecting regulatory shifts beyond growth dilution.

• Why it matters: Rising CO2 creates a paradox for global agriculture by boosting photosynthesis and productivity while compromising crop nutritional quality.
• What they did: This review summarizes evidence on how elevated CO2 affects nitrogen nutrition, including how nitrate (NO3-) versus ammonium (NH4+) availability shapes growth and N status, plus signaling for NO3- uptake and interactions with photorespiration.
• The result: It also synthesizes effects and regulatory mechanisms for sulphur (S), phosphorus (P), and micronutrients iron (Fe) and zinc (Zn), providing a framework to guide future crop breeding and climate-resilient agronomic management.