Table 3.
Effect of growth regulators on in vitro rooting of Artemisia tridentata subsp. tridentata shoot tips sorted by rooting clusters. The rooting response was evaluated based on the presence/absence of roots (response %) and the average number of roots per shoot tip (simplified as Av. No. of Roots in the table header). Values represent the mean ± standard errors of 13 to 17 individual lines with three tips per individual line × treatment combination.
| Cluster | Growth Regulator | Concentration (mg/L) | Response (%) | Av. No. of Roots |
|---|---|---|---|---|
| grey | Control | - | 0 ± 0 | 0 ± 0 |
| grey | IBA | 0.5 | 11.1 ± 4.2 | 0.22 ± 0.10 |
| grey | IBA | 1 | 20.0 ± 7.1 | 0.44 ± 0.21 |
| grey | NAA | 0.5 | 13.3 ± 6.3 | 0.16 ± 0.08 |
| grey | NAA | 1 | 13.3 ± 5.4 | 0.22 ± 0.13 |
| pink | Control | - | 0 ± 0 | 0 ± 0 |
| pink | IBA | 0.5 | 49.0 ± 8.1 | 1.16 ± 0.19 |
| pink | IBA | 1 | 74.5 ± 6.1 | 1.82 ± 0.32 |
| pink | NAA | 0.5 | 39.2 ± 6.5 | 0.63 ± 0.12 |
| pink | NAA | 1 | 43.1 ± 4.7 | 0.86 ± 0.2 |
| blue | Control | - | 30.8 ± 8.8 | 0.62 ± 0.23 |
| blue | IBA | 0.5 | 87.2 ± 4.7 | 2.97 ± 0.37 |
| blue | IBA | 1 | 87.2 ± 6.0 | 3.59 ± 0.45 |
| blue | NAA | 0.5 | 74.4 ± 9.4 | 1.74 ± 0.37 |
| blue | NAA | 1 | 66.7 ± 6.5 | 2.28 ± 0.33 |