The significance for comparing the difference of the relative growth rates (RGR)/the condensed tannin content (CT%) among the 4 species under 9 different types of treatments.

Bonferroni corrections were used for the multiple comparison analyses, and significant differences (at the significance level of α = 0.05) are considered to be present between two species with different symbols. Treatments: CK, treatments with no salinity and no simulated herbivory stress; simulated herbivory (low) or simulated herbivory (high), treatments with 25% or 50% leaf area cutting; salinity (low) or salinity (high), treatments with watering 4 g L−1 or 8 g L−1 NaCl solution; “+”, treatments with both salinity and simulated herbivory stress simultaneously.