Table 3. 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.
| Treatments | I. cairica | I. triloba | I. digitata | P. foetida | |
| CK | RGR | a | b | a | a |
| CT% | a | c | a | b | |
| Simulated herbivory (low) | RGR | a | b | a | a |
| CT% | a | b | a | b | |
| Simulated herbivory (high) | RGR | a | c | ab | b |
| CT% | a | b | a | b | |
| Salinity (low) | RGR | a | b | a | a |
| CT% | a | c | b | c | |
| Salinity (high) | RGR | a | c | b | ab |
| CT% | a | bc | b | c | |
| Salinity (low) + Simulated herbivory (low) | RGR | a | c | ab | b |
| CT% | a | b | a | b | |
| Salinity (low) + Simulated herbivory (high) | RGR | a | c | b | b |
| CT% | a | c | a | b | |
| Salinity (high) + Simulated herbivory (low) | RGR | a | c | b | ab |
| CT% | a | b | a | b | |
| Salinity (high) + Simulated herbivory (high) | RGR | a | c | b | b |
| CT% | a | b | a | a |
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.