Salt addition alone does not influence PPO and TPI levels
There was no significant interaction between day and salt application on PPO and TPI levels (all P > 0.05). Furthermore, PPO and TPI levels did not significantly differ with salt application (allP > 0.05). There was a significant main effect of day on PPO levels (F (1.432, 24.34) = 7.446, P = 0.0062), wherein PPO levels significantly increased from Day 1 to Day 3 in no-salt-treated leaves (Figure 6A; Šídák’s multiple comparisons test, P = 0.0351). There was also a significant main effect of day on TPI levels (F (1.927, 30.83) = 9.239,P = 0.0008), wherein TPI levels significantly decreased from Day 1 to Day 5 in no-salt-treated leaves (Figure 6B; Šídák’s multiple comparisons test, P = 0.0156). Salt addition alone does not lead to significant changes in leaf PPO and TPI levels.