Fig. 3

The effects of proteasome inhibition on the (a) viability, b maximum photochemical efficiency of PSII (Fv/Fm), and c ETR of Chlamydomonas cells grown at three different light conditions. Measurements were taken 48 h for algae grown in the dark or low light, or 2 h for algae grown under high light. d The effect of 20 μM MG132 was evaluated in cells grown under low and high light for 4 h. Shown are the means and standard errors of five replicate cultures, which are representative of at least five other experimental replicates for chlorophyll fluorescence measurements and two experimental replicates for flow cytometry measurements. Error bars are too small to plot. Asterisks represent a significant difference (p < 0.05) between treatments at each time point. L-ladder; LL- low light; HL- high light; ETR- electron transport rate