Table 2.
Effects of nutrient solution concentration (NSC) on camptothecin concentration of O. pumila organs at 63 days after the start of the treatment (DAT) in experiment 1 (n = 8).
| NSC | Camptothecin Concentration (mg g−1 DW) | |||
|---|---|---|---|---|
| Leaf 1 | Stem | Root | ||
| Young | Mature | |||
| 0.125 | 0.8 b 2 | 0.1 | 2.2 | 1.0 b |
| 0.25 | 1.2 a | 0.2 | 2.0 | 1.7 a |
| 0.5 | 1.0 a | 0.2 | 2.0 | 0.9 b |
| 1.0 3 | 0.7 b | 0.1 | 1.9 | 1.0 b |
1 Leaves from the top to the second node were classified as young leaves, and the leaves below that were classified as mature leaves. 2 Different letters within columns indicate significant differences among the treatments at p < 0.05 by Tukey–Kramer’s test. 3 1.0 NSC is the standard concentration of Otsuka-A nutrient solution.