Table 3 Maximum quantum yield of fluorescence of photosystem II (ΦPSIImax) and the photosynthetic parameters from samples taken at the YI ice-water interface. rETRmax: maximum relative electron transfer rate (no unit), α: photosynthetic efficiency (µmol photons m−2 s−1)−1, Ek = rETRmax/α: photosynthetic saturation irradiance (µmol photons m−2 s−1). Average ± SE, n = 3.
Date | ΦPSIImax | rETRmax | α | Ek |
|---|---|---|---|---|
5 May | 0.64 ± 0.11 | 128 ± 12 | 0.59 ± 0.03 | 219 ± 22 |
6 | 0.57 ± 0.01 | 118 ± 24 | 0.50 ± 0.02 | 239 ± 55 |
10 | 0.40 ± 0.05 | 72 ± 20 | 0.46 ± 0.07 | 153 ± 20 |
12 | 0.54 ± 0.03 | 198 ± 30 | 0.51 ± 0.05 | 383 ± 35 |
14 | 0.46 ± 0.07 | 168 ± 46 | 0.32 ± 0.10 | 549 ± 33 |
