Root biochemical and photosynthetic responses of Lupinus albus under different nitrogen forms and phosphorus sources addition.

Nitrate combined with polyphosphate enhances shoot and root biomass, photosynthetic efficiency, and nutrient uptake in Lupinus albus by significant margins.

• Why it matters: Understanding how nitrogen forms and phosphorus sources influence plant growth and metabolism is vital for optimizing nutrient management and improving crop productivity.
• What they did: The study evaluated the effects of NO3- versus NH4+ and orthophosphate versus polyphosphate on Lupinus albus, measuring biomass, photosynthesis, root traits, and nutrient uptake.
• The result: Nitrate with polyphosphate increased biomass and photosynthetic performance, while ammonium reduced root traits and photosynthesis, highlighting the importance of N form and P source interaction for plant health.