Table 2.
Contents of Photosynthetic Pigments and Tocopherols of Col and the vte2 and vte1 Mutants after HL1800 Treatment at 22°C
| After HL1800
|
||||
|---|---|---|---|---|
| Pigments and Tocopherols | Col | vte2-1 | vte1-1 | vte1-2 |
| Total tococpherols | 1.58 ± 0.25a | 0 ± 0b | 0 ± 0b | 0 ± 0b |
| Total chlorophylls | 17.28 ± 1.01 | 16.60 ± 1.37 | 16.51 ± 1.84 | 16.21 ± 2.05 |
| Chlorophyll a | 12.25 ± 0.87 | 11.69 ± 1.04 | 11.61 ± 1.38 | 11.52 ± 1.58 |
| Chlorophyll b | 5.02 ± 0.26 | 4.90 ± 0.35 | 4.90 ± 0.51 | 4.69 ± 0.50 |
| Chlorophyll a/chlorophyll b | 2.44 ± 0.16 | 2.38 ± 0.09 | 2.37 ± 0.13 | 2.45 ± 0.14 |
| Total carotenoids | 5.37 ± 0.35a | 4.98 ± 0.36b | 4.85 ± 0.54b | 4.75 ± 0.70b |
| β-Carotene | 0.66 ± 0.08 | 0.64 ± 0.07 | 0.63 ± 0.09 | 0.64 ± 0.11 |
| Lutein | 2.45 ± 0.14a | 2.39 ± 0.15a,b | 2.26 ± 0.22b,c | 2.20 ± 0.27c |
| Neoxanthin | 0.57 ± 0.03a | 0.51 ± 0.04b | 0.51 ± 0.06b | 0.50 ± 0.07b |
| Violaxanthin | 1.01 ± 0.12a | 0.57 ± 0.10c | 0.78 ± 0.17b | 0.77 ± 0.22b |
| Antheraxanthin | 0.39 ± 0.04a,b | 0.39 ± 0.04a | 0.36 ± 0.04b,c | 0.36 ± 0.04c |
| Zeaxanthin | 0.28 ± 0.05b | 0.48 ± 0.06a | 0.30 ± 0.06b | 0.29 ± 0.03b |
| A+Z+V | 1.69 ± 0.13a | 1.44 ± 0.12b | 1.44 ± 0.18b | 1.42 ± 0.26b |
| A+Z/A+Z+V | 0.40 ± 0.05c | 0.61 ± 0.05a | 0.46 ± 0.07b | 0.47 ± 0.07b |
Plants were grown for 4 weeks under permissive growth conditions (120 μmol·m−2·s−1), and pigment contents were analyzed after 4 d of HL (1800 μmol·m−2·s−1) treatment. Data are means ± sd and are expressed as micrograms per square centimeter (n = 19). When significance was observed between genotypes (ANOVA; P < 0.05), pair-wise comparisons of least-square means were evaluated, and nonsignificant groups are indicated by a, b, or c, with a being the highest group. A+Z+V, antheraxanthin + zeaxanthin + violaxanthin.