Table 1. Mean, standard error and results of repeated measures ANOVA in photosynthetic parameters and Tukey HSD test (H: HighCO2, C: Control CO2, 60: 60 days 90: 90 days, n = 7).
| Variable | Control CO2 |
High CO2 |
Source | DF | DFerror | MS | MSerror | F | P | Tukey’s tests | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 60 days | 90days | 60 days | 90days | |||||||||
| Maximum Quantum Yield | 0.708 (0.012) | 0.682 (0.179) | 0.712 (0.008) | 0.705 (0.008) | CO2 | 1 | 12 | 0.00 | 0.00 | 1.10 | 0.314 | |
| Time | 1 | 12 | 0.00 | 0.00 | 2.28 | 0.157 | ||||||
| Time x CO2 | 1 | 12 | 0.00 | 0.00 | 0.74 | 0.406 | ||||||
| Alfa | 0.179 (0.007) | 0.144 (0.009) | 0.186 (0.006) | 0.15 (0.008) | CO2 | 1 | 12 | 0.00 | 0.00 | 0.61 | 0.452 | |
| Time | 1 | 12 | 0.01 | 0.00 | 27.32 | <0.001 | 90 < 60 | |||||
| Time x CO2 | 1 | 12 | 0.00 | 0.00 | 0.02 | 0.899 | ||||||
| Maximum electron transport rate (ETRmax) | 12.15 (0.92) | 9.11 (0.462) | 16.73 (0.99) | 9.11 (0.419) | CO2 | 1 | 12 | 36.66 | 3.69 | 9.93 | 0.008 | C < H |
| Time | 1 | 12 | 198.68 | 4.11 | 48.31 | <0.001 | 90 < 60 | |||||
| Time x CO2 | 1 | 12 | 36.60 | 4.11 | 8.90 | <0.001 | C90 = H90 < C60 < H60 | |||||
| Saturation Irradiance (Ek) | 68.35 (4.68) | 64.34 (3.56 | 90.65 (5.9) | 62.91 (3.03) | CO2 | 1 | 12 | 762.10 | 197.00 | 3.87 | 0.0728 | |
| Time | 1 | 12 | 1764.60 | 79.40 | 22.23 | <0.001 | 90 < 60 | |||||
| Time x CO2 | 1 | 12 | 985.70 | 79.40 | 12.41 | 0.004 | C90 = H90 < C60 < H60 | |||||