|  | Low temperature | Low nitrogen | Low phosphorus | ||||||
---|---|---|---|---|---|---|---|---|---|---|
PS parameter | Unit | Control T | Cold | % | Control N | Low N | % | Control P | Low P | % |
assimilation | μmol m-2 s-1 | 8.00 | 8.92 | 111.51 | 8.11 | 5.46 | 67.33 | 8.11 | 4.06 | 49.98 |
 |  | (±1.29) | (±1.20) |  | (±1.07) | (±1.41) |  | (±1.07) | (±1.39) |  |
conductance | mmol m-2 s-1 | 74.71 | 90.25 | 120.79 | 47.19 | 32.58 | 69.04 | 47.19 | 47.19 | 99.99 |
 |  | (±10.11) | (±16.54) |  | (±7.68) | (±7.74) |  | (±7.68) | (±6.49) |  |
Ci | ppm | 161.59 | 167.24 | 103.49 | 154.57 | 166.47 | 107.70 | 154.57 | 283.11 | 183.16 |
 |  | (±12.00) | (±43.79) |  | (±19.14) | (±17.40) |  | (±19.14) | (±22.75) |  |
PSII efficiency | Â | 0.187 | 0.224 | 119.75 | 0.312 | 0.269 | 86.32 | 0.312 | 0.139 | 44.56 |
 |  | (±0.028) | (±0.046) |  | (±0.028) | (±0.014) |  | (±0.028) | (±0.030) |  |