Table 5.
Interaction of irrigation treatments (100%, 85% and 70% ETc), kaolin application (0%, 3% and 6%) in 2017 and (0%, 1.5% and 3%) in 2018 and cultivar on some biochemical characteristics of leaves of ʻGolabʼand ʻShafi-Abadiʼ apples
| Treatments | 2017 | 2018 | ||||
|---|---|---|---|---|---|---|
| Prolin (μmol g−1 FW | Glycine–betaine content (μmol g−1 FW) | MDA (nmol g−1 FW) | H2O2 content (μmol g−1 FW) | Prolin (μmol g−1 FW | MDA (nmol g−1 FW) | |
| 100% ETc | ||||||
| 0% Kaolin | 4.09d ± 0.41 | 24.01bc ± 3.86 | 19.32d ± 6.24 | 6.86c,d ± 0.89 | 2.83e ± 0.60 | 23.60a ± 4.25 |
| 1.5% Kaolin | – | – | – | – | 3.68d,e ± 0.62 | 24.84a ± 0.95 |
| 3% Kaolin | 4.61c,d ± 0.38 | 20.31d ± 3.21 | 22.45c ± 5.76 | 6.96b,c,d ± 0.81 | 4.13c,d ± 0.57 | 16.74b ± 2.15 |
| 6% Kaolin | 4.51c,d ± 0.74 | 20.31d ± 3.15 | 25.62a,b ± 8.10 | 6.48d ± 0.75 | – | – |
| 85% ETc | ||||||
| 0% Kaolin | 4.72c ± 0.49 | 22.97c,d ± 3.05 | 23.08b,c ± 4.71 | 7.64a,b ± 1.60 | 5.13c ± 0.44 | 25.00a ± 3.88 |
| 1.5% Kaolin | – | – | – | – | 4.99c ± 0.46 | 17.73b ± 3.23 |
| 3% Kaolin | 5.00b,c ± 0.45 | 24.76b,c ± 3.89 | 24.05bc ± 7.06 | 7.11b,c,d ± 1.46 | 4.83c,d ± 0.29 | 16.02b ± 2.02 |
| 6% Kaolin | 5.6a ± 0.77 | 24.69b,c ± 3.51 | 23.93b,c ± 8.01 | 6.88c,d ± 1.38 | – | – |
| 70% ETc | ||||||
| 0% Kaolin | 5.35a,b ± 0.62 | 23.38b,c ± 4.14 | 27.14a ± 5.22 | 7.32b,c ± 1.35 | 8.05a ± 0.22 | 23.73a ± 5.68 |
| 1.5% Kaolin | – | – | – | – | 6.69b ± 0.64 | 16.33b ± 1.08 |
| 3% Kaolin | 5.39a,b ± 0.61 | 25.94b ± 3.74 | 28.34a ± 5.51 | 7.64ab ± 1.36 | 6.44b ± 0.55 | 18.66b ± 1.16 |
| 6% Kaolin | 5.58a,b ± 0.80 | 32.46a ± 4.18 | 28.34a ± 7.35 | 8.26a ± 1.25 | – | – |
Means within each column for each treatment followed by the same letters are not significantly different at P ≤ 0.05