Fig. 6

Gas exchange parameters of sunn hemp (a-c) and napier grass (d-f) under Li treatment. (a and d) Net photosynthetic rate, (b and e) Stomatal conductance and (c and f) Transpiration rate. Data are expressed as mean ± SD. Significant differences were determined using ANOVA and Dunnett’s test (*p < 0.05, **p < 0.01, ***p < 0.001).