| Concentration (g/l) | % of explants without reaction | % of callogenous explants | Comments on the development of calluses |
| 0 | 3.3a | 90.0c | Green white callus, compact, friable and well developed (0.7 - 1.1 cm) |
| 0.5 | 30.0b | 53.3b | Brown callus, compact, friable and poorly developed (0.3 - 0.5 cm) |
| 1 | 73.3c | 16.7a | Brown callus, compact, friable and poorly developed (0.3 - 0.4 cm) |