Figure 3.

Effect of Trxs y on photosynthetic performance. Photosynthetic parameters were measured on whole rosettes of the wild type and mutant lines, as indicated, grown under short-day conditions for 6 weeks. (A) Quantum yields of photosystem II photochemistry (Y(II)) and (B) non-photochemical quenching (Y(NPQ)). Each value is the average of three determinations, except for ntrc-trxx (four measurements). Standard errors of the mean (SEM) are represented as error bars. White and black blocks indicate periods of illumination with actinic light (81 μE m⁻² s⁻¹) and darkness, respectively.