Figure 2.

Effect of nitrogen deficiency on photosynthetic parameters (a, b) of rice. Each angle of the pentagon showed different traits, Pn—net photosynthetic rate (μmol·m⁻² s⁻¹), Gs—stomatal conductance (mol·m⁻² s⁻¹), Ci—intercellular CO₂ concentration (μmol·mol⁻¹), Tr-transpiration rate (mmol·m⁻² s⁻¹) and WUE water use efficiency (μmol·mol⁻¹).