Figure 2.

Effect of varying the continuous background irradiance on amplitude of the oxygen pressure wave (black symbols with exponential fit). Black symbols are a scatter plot of three replicate experiments, all at 20°C. For each, the highest irradiance was 1,000 to 1,100 μmol m^–2 s^–1. White squares represent a photosynthetic light curve for CO₂ assimilation obtained at 20°C to 22°C using conventional gas exchange techniques. Ambient CO₂ concentration was 375 ± 3 μL L^–1. Data are normalized for comparison.