TABLE 3.
ANOVA results of the effects of location and intensity on oak growth, defenses, and nutrient allocation
| Location of Simulated Herbivory (apical versus auxiliary) | Intensity of Simulated Herbivory (25% versus 75%) | Location X Intensity of Simulated Herbivory | ||||
|---|---|---|---|---|---|---|
| F | p | F | p | F | p | |
| Growth responses | ||||||
| RGR height | 19.792 | <0.001* | 21.411 | <0.001* | 23.909 | <0.001* |
| RGR auxiliary growth | 0.001 | 1.000 | 0.042 | 0.838 | 0.854 | 0.356 |
| Defense responses | ||||||
| Polyphenols | 2.054 | 0.153 | 0.811 | 0.369 | 0.885 | 0.348 |
| Tannins | 0.208 | 0.649 | 4.170 | 0.051 | 0.058 | 0.810 |
| Condensed tannins | 0.933 | 0.335 | 6.149 | 0.014* | <0.001 | 0.995 |
| Trichome density | 0.481 | 0.489 | 0.960 | 0.328 | 1.398 | 0.597 |
| Morphological traits | ||||||
| Specific leaf area | 0.406 | 0.524 | 0.573 | 0.450 | 1.928 | 0.166 |
| Leaf aspect ratio | 0.280 | 0.607 | 2.695 | 0.029* | 3.026 | 0.108 |
| Leaf shape factor | 1.105 | 0.005* | 0.407 | 0.536 | 0.016 | 0.900 |
| Nutrient allocation | ||||||
| Foliar NSC | 2.054 | 0.153 | 0.811 | 0.369 | 0.885 | 0.348 |
| Root NSC | 2.368 | <0.001* | 2.870 | 0.092 | 3.156 | 0.077 |
| Foliar nitrogen | 0.280 | 0.597 | 0.115 | 0.735 | 1.166 | 0.281 |
Significant values indicated in bold with “*.” Growth responses were measured as relative growth rates (RGR), and nutrients include total nonstructural carbohydrates (NSC).