Figure 4.

Respiration of wild-type (WT) and mutant cells. A, The rate of O₂ uptake in the dark at 30°C on wild-type, ∆ndhV, ∆ndhS, and ΔndhQ cells grown under 2% (v/v) CO₂. The Chl a concentration was adjusted to 10 µg mL⁻¹ before measurement. Bars indicate ses (n = 5). B, Growth of wild-type, ∆ndhV, ∆ndhS, and ΔndhQ cells on agar plates in the absence (left) and presence (right) of Glc (5 mm) and DCMU (10 µm). Three microliters of cell suspensions with densities corresponding to A₇₃₀ nm values of 0.1 (top rows), 0.01 (middle rows), and 0.001 (bottom rows) were spotted on agar plates and incubated under 2% (v/v) CO₂ in air for 6 d at 40 µmol photons m⁻² s⁻¹.