Fig. 10

Effects of alkaline stress on seedling photosynthetic characteristics of Prunus triloba. The x-axis represents the measured time (h), the y-axis are the photosynthetic parameters content of the control and treatment materials, of which (a) Net photosynthetic rate (Pn, μmol· m⁻²· s⁻¹); b Stomatal conductance (Gs, mmol· m⁻²· s⁻¹); c Intercellular CO₂ concentration (Ci, μL· L⁻¹); d Transpiration rate (Tr, mmol· m⁻²· s⁻¹); e Water use efficiency (WUE, Pn/Tr). The red smooth curve in the picture represents the control material, whereas the blue smooth curve represents the treatment material