Table 1.
Effect of treatments (B=bud damage; B&D=bud damage and defoliation; C=control; D=50% defoliation) on leaf-level factors of Eucalyptus globulus in week 5 only.
| Parameter | B | B&D | C | D | P-value |
|---|---|---|---|---|---|
| VCmax (μmol m–2 s–1) | 90.7 (0.4)a | 113.2 (5.9) b | 82.1 (1.4) a | 94.9 (5.7) a | *** |
| Jmax (μmol m–2 s–1) | 163.8 (5.4) a,b | 184.8 (5.4) b | 137.2 (9.6) a | 137.5 (9.3) a | ** |
| Leaf Narea (g m–2) | 1.24 (0.08) a | 1.70 (0.2) b | 0.939 (0.07) a | 1.163 (0.1) a | *** |
| Leaf Nmass (%) | 0.98 (0.07) | 1.34 (0.1) | 0.99 (0.08) | 1.24 (0.09) | P = 0.06 |
| SLA (cm2 g–1) | 78.3 (5.8) a | 78.6 (5.8) a | 106.6 (5.8) b | 106.9 (5.8) b | *** |
| Soluble sugars (%) | 5.9 (0.7) | 6.0 (0.4) | 5.4 (0.4) | 6.5 (0.3) | NS |
| Starch (%) | 10.7 (1.8) | 11.4 (1.1) | 9.2 (0.7) | 10.8 (1.2) | NS |
| Specific soluble sugars (mg g–1) | |||||
| Fructose | 22.7 (2.8) | 19.7 (2.2) | 21.9 (2.3) | 24.0 (1.8) | NS |
| Galactinol | 2.89 (0.2) a | 4.91 (0.2) b | 2.31 (0.2) a | 2.44 (0.4) a | *** |
| Gentiobiose | 4.54 (0.9)c | 1.38 (0.2) a,b | 3.77 (0.7) b,c | 1.18 (0.3)a | ** |
| Glucose | 19.5 (2.7) | 16.3 (1.9) | 17.8 (1.8) | 19.8 (1.2) | NS |
| Raffinose | 1.91 (0.6) a | 5.83 (0.6)b | 1.43 (0.4)a | 5.8 (0.2)b | *** |
| Stachyose | 0.31 (0.04) a | 0.62 (0.07) b | 0.24 (0.01) a | 0.38 (0.02) a | *** |
| Sucrose | 0.79 (0.3) a | 2.91 (0.5) b | 0.57 (0.2) a | 6.33 (0.6) c | *** |
Asterisks indicate significance of treatment (Trt), *P ≤ 0.05; **P ≤0.01, ***P ≤0.001; NS, non-significant. Different letters denote a significant treatment (α=0.05) effect within a measurement period. Error bars are 1 SE, n=4 for all treatments.