Table 2 Effective quantum yield of PSII at different CO₂ regimes (0 ppm, 350 ppm and 2000 ppm CO₂) in response to an increase in the light intensity from 80 to 285 μmol quanta m^-2s^-1.

0 min

0.318 ± 0.071

0.167 ± 0.050

0.192 ± 0.090

0.278 ± 0.063

4.5 min

0.093 ± 0.040

0.032 ± 0.008

0.071 ± 0.043

0.051 ± 0.039

0 min

0.580 ± 0.039

0.596 ± 0.029

0.661 ± 0.033

0.599 ± 0.041

4.5 min

0.388 ± 0.036

0.395 ± 0.029

0.314 ± 0.037

0.437 ± 0.032

0 min

0.663 ± 0.025

0.704 ± 0.022

0.734 ± 0.012

0.710 ± 0.019

4.5 min

0.518 ± 0.033

0.482 ± 0.046

0.345 ± 0.026

0.519 ± 0.037