Fig. 3.
Photosynthetic parameters in wild-type tobacco and two ∆psaI mutants. Plants were grown in low-light conditions (100 µE m−2 s−1), intermediate-light conditions (350 µE m−2 s−1), high-light conditions (1000 µE m−2 s−1), and in intermediate-light conditions at an elevated day temperature of 38°C and a decreased temperature of 12°C. All measurements were performed at 22°C. Data are the averages of a minimum of six biological replicates from at least two independent plant cultures, and the standard deviation is shown. The asterisks indicate significant differences between wild type and mutants. (A) Chlorophyll a/b ratio. (B) Chlorophyll content per leaf area. (C) Leaf absorptance. (D) FV/FM, the maximum quantum efficiency of PSII in the dark-adapted state. (E) Linear electron flux capacity, which was corrected for leaf absorptance.