Table I.
Phosphorus status, tiller size, and developmental stage of leaves selected for analysis of leaf growth and underlying cellular dynamics
L. perenne plants were grown for 47 d at high (1 mm) and 61 d at low (0.02 mm) phosphorus supply. Data are averages of six plants (±se), along with the significance of the difference between phosphorus treatments based on a t test. ***, P ≤ 0.001; NS, not significant, P > 0.05.
| Parameter | High Phosphorus | Low Phosphorus | Significance |
|---|---|---|---|
| Phosphorus in the growth zone (mg g−1 fresh weight) | 1.07 ± 0.01 | 0.61 ± 0.01 | *** |
| Number of green leaves per tiller | 4.8 ± 0.19 | 4.7 ± 0.24 | NS |
| Sheath length of the youngest expanded leaf (mm) | 90 ± 5 | 101 ± 5 | NS |
| Blade length of the youngest expanded leaf (mm) | 305 ± 14 | 342 ± 20 | NS |
| Blade length of the growing leaf (mm) | 206 ± 13 | 190 ± 24 | NS |
| Blade length expanded: blade length growing leaf | 0.68 ± 0.05 | 0.57 ± 0.08 | NS |