| 2,4-D (mg∙l−1) | Callus induction (%) (Mean ± SE) | Color | Texture |
| 0.0 | 0 ± 0 | - | - |
| 0.5 | 100 ± 0 | Grey-white | Soft |
| 1.0 | 90 ± 10 | Grey-white | Compact |
| 1.5 | 36 ± 31.7 | Grey-white | Soft |
| 2.0 | 100 ± 0 | Grey-white | Soft |
| 2.5 | 96.6 ± 3.3 | White | Soft |
| 3.0 | 86.6 ± 13.3 | White | Soft |
| 3.5 | 100 ± 0 | Dark-grey | Soft |
| 4.0 | 86.6 ± 13.3 | White | Compact |