Table 4. Plant hormone levels in diploid and autotetraploid apple plants (cultivar ‘Hanfu’) assayed in 2010 (3 years old) and 2012 (5 years old).
| Ploidy | IAA content (ng/g FW) | GA1 content (ng/g FW) | Brassinosteroid content (ng/g FW) | |||
|---|---|---|---|---|---|---|
| 2010 | 2012 | 2010 | 2012 | 2010 | 2012 | |
| 2x | 88.03 ± 20.71* | 79.39 ± 10.70* | 0.36 ± 0.02 | 0.11 ± 0.01 | 0.75 ± 0.04* | 0.70 ± 0.03* |
| 4x | 60.03 ± 11.98 | 42.08 ± 2.42 | 0.32 ± 0.01 | 0.08 ± 0.01 | 0.15 ± 0.06 | 0.48 ± 0.08 |
Each value is the mean and standard deviation of five replicate plots with three trees per plot. *Means in the same row followed by different letters were significantly different at р < 0.05.