Figure 3.

Effects of TrxA levels on photosynthetic pigments, oxygen production and PSII and PSI maximum yield in the STXA2 strain. A, Chl, (B) PBS, and (C) carotenoids contents in the WT and STXA2 strains in the presence (+) or absence of inducer (−; 24–72 h). D, Oxygen evolution rates under growth light (50 µmol photons·m⁻²·s⁻¹) measured on a Clark-type electrode. E, Maximum fluorescence yield (Fm) determined in the presence of DCMU (20 µM) under growth light (50 µmol photons·m⁻²·s⁻¹). F, Maximum amount of photo-oxidizable P700 (Pm) determined as the change in absorbance at 830 nm relative to absorbance at 875 nm after applying a saturation pulse (5,000 µmol photons·m⁻²·s⁻¹, 200 ms) in cells pre-illuminated with far-red light (720 nm, 75 W·m⁻²). Data are means ± sd from three biological replicates in all cases.