Table I. Chlorophyll a/b ratio, chlorophyll content per leaf area, Fv/Fm, and contents of PSII, the cyt-bf, plastocyanin, and PSI of mature leaves of wild-type plants and the inducible PetM and PetC RNAi mutants grown either under standard growth conditions (250 µmol photons m–2 s–1) or under high-light conditions (1,000 µmol photons m–2 s–1).
All parameters were determined after 7 d of RNAi induction. Average values and sds for a minimum of five individual plants are given. For no parameter, a significant difference between the wild type and the RNAi-lines was observed.
| Parameter | Wild Type (250 µmol) | PetM RNAi (250 µmol) | PetC RNAi (250 µmol) | Wild Type (1,000 µmol) | PetM RNAi (1,000 µmol) | PetC RNAi (1,000 µmol) |
|---|---|---|---|---|---|---|
| Chlorophyll a/b | 3.56 ± 0.16 | 3.52 ± 0.08 | 3.49 ± 0.12 | 3.27 ± 0.22 | 3.42 ± 0.33 | 3.38 ± 0.30 |
| Chlorophyll (mg m–2) | 546.6 ± 33.5 | 524.7 ± 30.0 | 475.7 ± 54.8 | 372.3 ± 24.0 | 366.1 ± 49.5 | 410.9 ± 38.9 |
| Fv/Fm | 0.79 ± 0.02 | 0.80 ± 0.01 | 0.79 ± 0.02 | 0.71 ± 0.03 | 0.72 ± 0.04 | 0.71 ± 0.04 |
| PSII (µmol m–2) | 1.24 ± 0.20 | 1.21 ± 0.13 | 1.10 ± 0.14 | 0.81 ± 0.10 | 0.90 ± 0.14 | 0.89 ± 0.13 |
| cyt-bf (µmol m–2) | 0.32 ± 0.03 | 0.29 ± 0.07 | 0.27 ± 0.02 | 0.20 ± 0.03 | 0.22 ± 0.03 | 0.21 ± 0.04 |
| Plastocyanin (µmol m–2) | 1.69 ± 0.33 | 1.98 ± 0.25 | 1.51 ± 0.28 | 1.30 ± 0.32 | 1.52 ± 0.37 | 1.73 ± 0.25 |
| PSI (µmol m–2) | 1.21 ± 0.10 | 1.22 ± 0.09 | 1.07 ± 0.13 | 0.72 ± 0.08 | 0.70 ± 0.08 | 0.82 ± 0.11 |