Concentration-Dependent N-P Interactions Cause Organ-Specific Responses and Nutrient Allocation in Poplar Seedlings.

ABSTRACT: This study explores the complex regulatory mechanisms of nitrogen (N) and phosphorus (P) supply interactions on the growth, root architecture, and nutrient uptake of Populus × euramericana 'Neva' seedlings. It shows that these responses depend on nutrient concentrations and exhibit organ-specific patterns. Low P (0 mM) and sufficient N (15-30 mM) enhances plant height and aboveground biomass by promoting P acquisition processes. At moderate N levels (5-15 mM), P supply is sufficient (0.5-1.5 mM) for root and stem growth. Nitrogen application prioritizes aboveground biomass, reducing the root-to-shoot ratio. Root architecture also responds organ-specifically: sufficient N under low P promotes fine root growth to increase P absorption; under moderate P (0.5 mM), balanced N opti

SUBMITTER: Tang X 

PROVIDER: S-EPMC12526209 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature