Table II.
DEPS and PSII quantum efficiency in preilluminated wild-type plants
Leaves were illuminated for 15 min at indicated light intensities followed by a dark incubation for 15 min. The DEPS is expressed as (Zx + 0.5 Ax)/(Vx + Ax + Zx) × 100. Mean values ± sd of three independent experiments are shown. For FV/FM ratios, significant differences in comparison with the wild type are indicated by ** (P < 0.01) or * (P < 0.05).
| Light Intensity | DEPS | FV/FM |
|---|---|---|
| μmol photons m−2s−1 | ||
| 0 (dark control) | 2.2 ± 0.1 | 0.83 ± 0.01 |
| 300 | 42.6 ± 0.7 | *0.80 ± 0.01 |
| 500 | 41.7 ± 0.8 | *0.80 ± 0.01 |
| 1,000 | 46.3 ± 2.3 | **0.79 ± 0.01 |
| 2,000 | 54.1 ± 0.5 | **0.75 ± 0.01 |