Table 2. Chlorophyll Contents and Chlorophyll Fluorescence Parameters of Wild-Type (Col-0) and mtLPD Overexpression Plants.
| Parameter | Col-0 | PsL-L1 | PsL-L2 | PsL-L3 |
|---|---|---|---|---|
| Chlorophyll a | 1.46 ± 0.15 | 1.46 ± 0.18 | 1.69 ± 0.21 | 1.59 ± 0.24 |
| Chlorophyll b | 0.51 ± 0.03 | 0.51 ± 0.07 | 0.52 ± 0.07 | 0.50 ± 0.09 |
| Chlorophyll a and Chlorophyll b | 1.97 ± 0.15 | 1.97 ± 0.22 | 2.21 ± 0.23 | 2.09 ± 0.32 |
| Chlorophyll a/chlorophyll b | 2.91 ± 0.33 | 2.91 ± 0.49 | 3.27 ± 0.52 | 3.18 ± 0.35 |
| PSI | ||||
| rETRmax | 55.86 ± 5.75 | 52.11 ± 4.11 | 49.88 ± 3.92 | 50.91 ± 6.08 |
| Alpha | 0.38 ± 0.03 | 0.44 ± 0.03** | 0.43 ± 0.02** | 0.45 ± 0.03** |
| Lopt | 341.14 ± 22.94 | 293.66 ± 20.12** | 285.57 ± 17.76** | 299.17 ± 28.47* |
| PSII | ||||
| Fv/Fm | 0.77 ± 0.01 | 0.78 ± 0.01 | 0.76 ± 0.02 | 0.77 ± 0.02 |
| rETRmax | 41.23 ± 2.63 | 37.63 ± 2.78 | 36.71 ± 2.12 | 38.33 ± 4.77 |
| Alpha | 0.40 ± 0.02 | 0.42 ± 0.01 | 0.43 ± 0.01* | 0.44 ± 0.02* |
| Lopt | 246.12 ± 15.08 | 220.88 ± 14.87* | 218.42 ± 13.12** | 215.24 ± 19.64* |
| Lcp# | 11.96 ± 0.81 | 11.01 ± 1.56 | 9.48 ± 1.29* | 9.66 ± 0.91* |
Plants were grown under environmental controlled conditions (10/14-h day/night, 390 ppm CO2, 20/18°C day/night) to growth stage 5.1 (Boyes et al., 2001) and subsequently used for chlorophyll determination and chlorophyll fluorescence measurements. Values presented are means ± sd of measurements from at least five biological replicates per genotype (µmol*mg−1 fresh weight). Values in bold indicate values statistically significant from the wild type based on Student’s t test (*P < 0.05, **P < 0.01). Further chlorophyll fluorescence parameters (Y[I], Y[II], Y[NA], and Y[ND]) are given in Supplemental Data Set 1. Fv/Fm, maximum quantum yield of PSII (dark adapted); Lopt, optimal light intensity; Lcp, light compensation point (#determined by gas-exchange measurements); rETRmax, relative maximal electron transport rate.