Table 4.
The effect of rootstock and crop load interaction on the accumulation of phytohormones in “Auksis” buds (ng g−1. FW).
| Treatment | Promoters | Inhibitors | |||||
|---|---|---|---|---|---|---|---|
| Zeatin | JA | IAA | ABA | GA7 | GA3 | GA1 | |
| M.26 (75) | 9.04 c* | 278.2 cd | 166.1 cde | 8.59 de | 188.7 d | 18.8 g | 2.78 gh |
| M.26 (113) | 10.9 b | 358.1 b | 238.1 b | 11.0 b | 213.1 c | 35.2 b | 12.2 cd |
| M.26 (150) | 12.8 a | 438.0 a | 310.1 a | 13.5 a | 237.4 b | 51.5 a | 21.6 a |
| M.9 (75) | 3.83 hi | 157.3 e | 94.3 i | 3.38 hi | 147.9 f | 8.99 i | 4.59 efg |
| M.9 (113) | 8.20 cd | 326.2 bc | 148.8 efg | 5.01 gh | 189.2 d | 36.9 b | 3.87 fgh |
| M.9 (150) | 6.64 ef | 256.6 d | 124.3 h | 2.82 i | 127.2 g | 20.2 g | 9.74 d |
| B.396 (75) | 6.56 ef | 330.7 b | 144.9 fg | 8.01 de | 174.2 e | 18.8 g | 5.83 ef |
| B.396 (113) | 5.51 fg | 251.5 d | 150.8 efg | 7.12 ef | 172.3 e | 31.6 c | 6.60 e |
| B.396 (150) | 8.77 c | 361.8 b | 172.4 cd | 9.78 bcd | 354.4 a | 29.1 d | 22.5 a |
| P 67 (75) | 5.08 gh | 179.2 e | 88.4 ij | 5.49 fg | 166.0 e | 15.1 h | 1.86 h |
| P 67 (113) | 3.72 i | 151.8 e | 75.8 j | 3.20 hi | 96.0 h | 15.0 h | 2.95 gh |
| P 67 (150) | 7.04 de | 312.6 bc | 163.2 cdef | 3.50 ghi | 135.3 fg | 28.4 de | 10.4 d |
| P 22 (75) | 6.06 efg | 327.3 bc | 176.8 c | 10.8 bc | 167.3 e | 32.3 c | 14.8 bc |
| P 22 (113) | 5.54 fg | 247.6 d | 156.5 def | 7.37 ef | 136.1 fg | 24.6 f | 15.5 b |
| P 22 (150) | 6.31 efg | 239.8 d | 133.8 gh | 8.97 cde | 132.1 g | 26.2 ef | 15.7 b |
| Effect of rootstock | |||||||
| M.26 | 10.9 a | 358.1 a | 238.1 a | 11.0 a | 213.1 b | 35.2 a | 12.2 b |
| M.9 | 6.22 c | 246. 7 c | 122.5 c | 3.74 d | 154.8 c | 22.02 d | 6.07 c |
| B.396 | 6.95 b | 314.7 b | 156.0 b | 8.30 c | 233.7 a | 26.5 c | 11.7 b |
| P 67 | 5.28 d | 214.5 d | 109.1 d | 4.06 d | 132.4 e | 19.5 e | 5.07 c |
| P 22 | 5.97 c | 271.6 c | 155.7 b | 9.05 b | 145.1 d | 27.7 b | 15.3 a |
| Effect of crop load | |||||||
| 75 | 6.12c | 254.5 b | 134.1 c | 7.25 ab | 168.8 b | 18.8 c | 5.97 c |
| 113 | 6.78 b | 267.0 b | 154.0 b | 6.74 b | 161.4 c | 28.7 b | 8.22 b |
| 150 | 8.32 a | 321.8 a | 180.8 a | 7.70 a | 197.3 a | 31.1 a | 16.0 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 “Auksis” 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.