Table 2.
Content of photosynthetic pigments in the leaves and needles (Chl-a, Chl-b, and Chl-tot), hydrogen peroxide (H2O2), and malondialdehyde (MDA) of pubescent oak, holm oak, Aleppo pine, and black pine for the defoliated and undefoliated trees. Results are expressed as mean ± SD (n = 3). Values marked in bold show a statistically significant difference between the defoliated and undefoliated trees of a plant species according to the Student’s t-test (* p < 0.05).
| Species | Category | Chl-a | Chl-b | Chl-tot | H2O2 | MDA |
|---|---|---|---|---|---|---|
| µg g−1 FW | µg g−1 FW | µg g−1 FW | nmol g−1 FW | nmol g−1 FW | ||
| Pubescent oak | Undefoliated trees (≤25%) | 1503.93 ± 53.84 * | 366.39 ± 36.32 | 1870.32 ± 90.16 * | 44.04 ± 12.88 | 84.10 ± 7.33 * |
| Defoliated trees (>25%) | 1302.68 ± 57.91 | 347.22 ± 35.22 | 1649.90 ± 93.13 | 39.4 ± 5.67 | 48.95 ± 4.13 | |
| Holm oak | Undefoliated trees (≤25%) | 1673.62 ± 69.47 * | 466.84 ± 42.40 * | 2140.46 ± 111.87 * | 0.03 ± 0.01 | 93.65 ± 7.57 |
| Defoliated trees (>25%) | 1387.09 ± 55.64 | 357.96 ± 24.75 | 1745.05 ± 80.39 | 0.02 ± 0.00 | 140.63 ± 6.16 * | |
| Aleppo pine | Undefoliated trees (≤25%) | 406.74 ± 119.81 | 123.81 ± 25.77 | 530.55 ± 145.85 | 0.58 ± 0.09 | 16.49 ± 3.65 |
| Defoliated trees (>25%) | 562.72 ± 104.72 | 250.47 ± 34.61 * | 813.19 ± 139.33 | 0.61 ± 0.2 | 31.60 ± 4.31 * | |
| Black pine | Undefoliated trees (≤25%) | 666.30 ± 23.50 | 221.35 ± 13.81 | 887.65 ± 37.31 | 0.89 ± 0.21 * | 27.76 ± 5.06 |
| Defoliated trees (>25%) | 795.59 ± 8.42 * | 241.20 ± 26.52 | 1034.79 ± 34.94 * | 0.32 ± 0.06 | 24.57 ± 4.41 |