Figure 1

Effects of salinity and Si on net photosynthetic rate (Pn, a), stomatal conductance (gs, b), transpiration rate (Tr, c), and intercellular CO2 concentration (Ci, d) in the two liquorice species. Data are presented as the mean ± SE (n = 3). Different letters indicate significant differences between the values for one index for the same liquorice species under different treatments (P < 0.05).