Figure 3

Reduction of PSII performance of C. reinhardtii strains during the HL/HT treatment. (A) The maximum quantum yield of PSII photochemical reaction (Fv/Fm = (Fm − F0)/Fm) and (B) electron transport efficiency [1 − VJ = (1−(FJ − F0)/(Fm − F0)] were calculated for cultures exposed for 0, 15, 30 and 90 min to 1000 µmol m−2 s−1 light intensity at 37 °C. At the corresponding times, samples were harvested also from cultures kept under normal growth conditions as a control. The values of Fv/Fm and 1-VJ for each strain at time 0 on panel C and D, respectively, represent average from all control values during the 90 min experiment, ± SE, n = 24. All other reported values are an average of three independent experiments ± SE, n = 6. P ≤ 0.05 (Mann-Whitney U Test).