Figure 4.

Effect of the temperature shift to 20°C on the growth, Chl a content, and the rate of photosynthesis in wild-type and Δ1848 Δ2060 cells at a photon flux density of 50 to 80 μmol m⁻² s⁻¹. A, Growth of the wild-type (white circles) and Δ1848 Δ2060 (black circles) cells after the temperature shift to 20°C. B, Changes in the content of Chl a in wild-type (white circles) and Δ1848 Δ2060 (black circles) cells after the temperature shift to 20°C. C, A view of cultures of wild-type and Δ1848 Δ2060 cells at 120 h after the start of new cultures at 30°C or 20°C. D, The rate of photosynthesis per Chl a (top section) and per OD₇₃₀ (bottom section) in wild-type (white columns) and Δ1848 Δ2060 (black columns) cells grown at 20°C for the indicated time (in hours). The measurement was at the photon flux density 1,500 μmol m⁻² s⁻¹. at 30°C. Each value represents an average of three independent experiments. Bars indicate sd.