| Concentration of amino acid (mg/l) | Thymol (ppm) | Percentage (%) of Increase compared with mother plants (+) | Percentage (%) of decrease compared with mother plants (−) | |
| Mother plants (leaves) | 310.0 |
|
| |
| Control (callus without amino acid) | 0.0 | 519.4 | +67 |
|
| Proline | 50 | 255.8 |
| −17 |
| 100 | 290.0 |
| −6 | |
| 150 | 224.4 |
| −27 | |
| Glutamine | 50 | 272.8 |
| −12 |
| 100 | 250.0 |
| −19 | |
| 150 | 286.0 |
| −7 | |
| Tryptophan | 50 | 185.5 |
| −40 |
| 100 | 699.7 | +125 |
| |
| 150 | 1518.8 | +390 |
| |
| Phenyl alanine | 50 | 153.6 |
| −50 |
| 100 | 296.2 |
| −4 | |
| 150 | 763.7 | +146 |
| |