Table III.
Endogenous cytokinin bases and riboside concentration in apical shoot meristems at different developmental stages ±se (S1–S4 as described in Fig. 1)
| Developmental Stages and Featuresa | Zeatin | DHZ | IP | ZR | DHZR | IPA |
|---|---|---|---|---|---|---|
| pmol g−1 fresh wt | ||||||
| S1 | ||||||
| 10 Leaves | 8.7 ± 0.9 | 11.7 ± 1.2 | 12.4 ± 1.3 | 48.9 ± 4.8 | 9.4 ± 0.9 | 39.6 ± 3.9 |
| 5 to 6 Weeks | ||||||
| S2 | ||||||
| 13 Leaves | ≤2.0 | ≤2.0 | ≤0.4 | 15.8 ± 1.5 | 3.9 ± 0.4 | 13.1 ± 1.3 |
| 5 to 6 Weeks | ||||||
| S3 | ||||||
| 15 Leaves | ≤3.0 | ≤3.0 | ≤0.4 | 21.3 ± 2.1 | 5.9 ± 0.6 | 17.4 ± 1.7 |
| 6 to 7 Weeks | ||||||
| S4 | ||||||
| 15 Leaves | 16.7 ± 1.7 | 13.1 ± 1.3 | 15.2 ± 1.6 | 97.4 ± 9.7 | 26.2 ± 2.6 | 43.5 ± 4.3 |
| 7 to 8 Weeks | ||||||
a
See Figure 1.