Table 3.
The effect of rootstock and crop load interaction on the accumulation of phytohormones in “Ligol” buds (ng g−1, FW).
| Treatment | Promoters | Inhibitors | |||||
|---|---|---|---|---|---|---|---|
| Zeatin | JA | IAA | ABA | GA7 | GA3 | GA1 | |
| M.26 (75) | 9.04 c* | 278.2 de | 126.1 cde | 8.59 d | 108.7 e | 18.8 e | 12.8 e |
| M.26 (113) | 10.94 b | 353.1 b | 198.1 b | 11.02 b | 148.1 c | 30.2 b | 17.2 c |
| M.26 (150) | 12.83 a | 428.0 a | 270.1 a | 13.45 a | 187.4 a | 41.5 a | 21.6 ab |
| M.9 (75) | 3.83 h | 157.3 i | 54.3 i | 3.38 jkl | 67.9 i | 8.99 h | 8.59 h |
| M.9 (113) | 8.20 cd | 336.2 b | 105.5 fg | 5.01 hi | 129.2 d | 26.9 c | 13.9 de |
| M.9 (150) | 6.64 ef | 246.6 fg | 84.3 h | 2.82 l | 77.2 h | 10.2 gh | 9.74 gh |
| B.396 (75) | 6.56 ef | 330.7 bc | 104.9 fg | 8.01 de | 94.2 f | 18.8 e | 15.8 cd |
| B.396 (113) | 5.51 fg | 261.5 ef | 110.8 efg | 7.12 ef | 112.3 e | 21.6 d | 16.6 c |
| B.396 (150) | 8.77 c | 351.8 b | 135.8 cd | 9.78 c | 164.4 b | 19.1 e | 22.5 a |
| P 67 (75) | 5.08 g | 179.2 i | 48.4 ij | 5.49 gh | 86.0 g | 15.1 f | 11.9 efg |
| P 67 (113) | 3.72 h | 161.8 i | 35.8 j | 3.20 kl | 36.0 j | 4.96 i | 8.95 h |
| P 67 (150) | 7.04 e | 302.6 cd | 119.9 def | 3.50 jkl | 85.2 gh | 18.4 e | 10.4 fgh |
| P 22 (75) | 7.38 de | 330.6 bc | 137.8 c | 6.22 fg | 89.1 fg | 26.2 c | 19.5 b |
| P 22 (113) | 7.20 de | 222.7 gh | 113.9 efg | 4.34 ij | 88.3 fg | 11.2 gh | 12.4 ef |
| P 22 (150) | 7.19 de | 212.4 h | 101.5 g | 4.17 ijk | 88.3 fg | 11.6 g | 11.8 efg |
| Effect of rootstock | |||||||
| M.26 | 10.94 a | 353.1 a | 198.1 a | 11.02 a | 148.1 a | 30.2 a | 17.2 b |
| M.9 | 6.22 c | 246.7 c | 81.4 c | 3.74 d | 91.4 c | 15.4 c | 10.7 d |
| B.396 | 6.95 b | 314.7 b | 117.2 b | 8.30 b | 123.7 b | 19.8 b | 18.3 a |
| P 67 | 5.28 d | 214.5 d | 68.0 d | 4.06 d | 69.1 d | 12.8 d | 10.4 d |
| P 22 | 7.26 b | 255.2 c | 117.7 b | 4.91 c | 88.6 c | 16.3 c | 14.6 c |
| Effect of crop load | |||||||
| 75 | 6.38 c | 255.2 c | 94.3 c | 6.34 a | 89.2 c | 17.6 c | 13.7 b |
| 113 | 7.11 b | 267.0 b | 112.8 b | 6.14 a | 102.8 b | 19.1 b | 13.8 b |
| 150 | 8.49 a | 308.3 a | 142.3 a | 6.74 a | 120.5 a | 20.1 a | 15.2 a |
*The different letters on the same column indicate significant differences between treatments, rootstock and crop load separately. The analysis was conducted with all data resulting from 9 trees of “Ligol” apple tree grafted on M.26, M.9, B.396, P 67, and P 22, with crop-load adjusted to 75, 113, and 150 fruits per tree. The data were processed using analysis of variance (ANOVA), the Turkey (HSD) multiple range test at the confidence level p = 0.05.
JA, jasmonic acid; IAA, indolyl-3 acetic acid; ABA, abscisic acid; GA7, GA3, GA1, gibberellins.