Table 4.
Pigment analysis of plants grown under 12 h lighting (200 µmol m–2 s–1 red + 50 µmol m–2 s–1 blue, 06:00–18:00) and CL (200 µmol m–2 s–1 red, 06:00–18:00 + 50 µmol m–2 s–1 blue, 18:00–06:00).
| Time of measurement | 18 DIT | 55 DIT | ||||
|---|---|---|---|---|---|---|
| Light treatment | 12 h Lighting | Continuous lighting | 12 h Lighting | Continuous lighting | ||
| Leaf rank | 5th | 5th | 5th | 10th | 5th | 10th |
| Chlorophyll a (µg cm−2) | 49.79 ± 0.78 A | 49.09 ± 0.71 A | 44.34 ± 2.58 A | 50.33 ± 2.03 A | 43.44 ± 0.68 A | 46.05 ± 0.70 B |
| Chlorophyll b (µg cm−2) | 14.41 ± 0.15 A | 14.47 ± 0.17 A | 13.36 ± 0.49 A | 14.53 ± 0.41 A | 13.17 ± 0.15 A | 13.75 ± 0.16 B |
| Chlorophyll a+b (µg cm−2) | 64.21 ± 0.93 A | 63.56 ± 0.88 A | 57.71 ± 3.01 A | 64.86 ± 2.44 A | 56.60 ± 0.83 A | 59.80 ± 0.86 B |
| Chlorophyll a:b | 3.45 ± 0.02 A | 3.39 ± 0.01 A | 3.30 ± 0.08 A | 3.46 ± 0.04 A | 3.29 ± 0.01 A | 3.35 ± 0.01 B |
| Carotenoids (µg cm−2) | 12.16 ± 0.29 A | 11.74 ± 0.19 A | 10.24 ± 0.94 A | 12.31 ± 0.66 A | 10.18 ± 0.19 A | 10.91 ± 0.19 B |
Parameters represent measurements taken at two time points during the life cycle of the plants. Values represent the mean ± the standard error of the mean with n = 4. Different letters (A, B) represent a significant difference within a time point and leaf rank of a given parameter at p < 0.05.