Table 1.
Electrolyte leakage (percent of total electrolytes ± SD), photosynthetic pigments content (µg/g of fresh leaf weight (FW) ± standard deviation (SD)), carbon assimilation rate (µM CO2/m2·s ± SD) and effective quantum yield of PSII (Fv/Fm; ±SD) in D. palmatum leaves cultivated under normal (20 °C) and low (1 °C) temperatures. 1
| Parameter | Temperature (°C) | |
|---|---|---|
| 20 | 1 | |
| Electrolyte leakage, % of total electrolytes | 18.2 ± 0.9 a | 26.7 ± 1.4 a |
| Chlorophyll a content (Chla), µg/g FW | 273.45 ± 9.29 a | 406.19 ± 13.40 a |
| Chlorophyll b content (Chlb), µg/g FW | 75.85 ± 2.50 a | 141.21 ± 4.79 a |
| Total chlorophylls content (ΣChl), µg/g FW | 349.30 | 547.40 |
| Chla/Chlb | 3.61 | 2.88 |
| Pheophytin a content, µg/g FW | 6.01 ± 0.16 a | 7.06 ± 0.14 a |
| Pheophytin b content, µg/g FW | 4.57 ± 0.10 a | 5.64 ± 0.11 a |
| Total pheophytins content, µg/g FW | 10.58 | 12.70 |
| Carotenoids content (Car), µg/g DW | 36.86 ± 1.07 a | 53.31 ± 1.55 a |
| ΣChl/Car | 9.48 | 10.27 |
| Carbon assimilation rate, µM CO2/m2·s | 8.3 ± 0.8 b | 5.8 ± 0.4 b |
| Fv/Fm | 0.62 ± 0.04 b | 0.54 ± 0.03 b |
1 Averages ± standard deviations were obtained from three (a) or ten (b) different experiments.