Table I.

Evolution of the fluorescence parameters in wild type and ATP synthase mutants after various times of illumination at 70 μE m⁻² s⁻¹

Strains	Time in Medium Light
	0			5 min			24 h		48 h
	Fv/Fm	(Fm − Fs)/Fv	Fm	Fv/Fm	(Fm − Fs)/Fv	Fm	Fv/Fm	Fm	Fv/Fm	Fm
			%			%		%		%
ac46	0.77	0.61	100	0.52	0.13	115	0.28	68	0.24	25
F54	0.68	0.70	100	0.50	0.19	125	0.45	63	0.22	21
atpC1	0.67	0.70	100	0.53	0.19	127	0.37	63	0.30	25
atpA-Fud16;ncc1	0.64	0.74	100	0.44	0.10	126	0.35	100	0.19	52
Wild type	0.70	0.57	100	0.72	0.75	96	0.69	94	0.65	102

After 5 s dark adaptation, actinic light (60 μE m⁻² s⁻¹) is turned on and the F₀ and F_s parameters are recorded at time 0 and 1.4 s, respectively. F_i and F_m are measured in the same manner except that DCMU is added during the dark adaptation period. The variable fluorescence F_v is F_m − F₀. The normalized parameters F_v/F_m and (F_m − F_s)/F_v reflect the activity of stable PSII charge separation and the activity of electron transfer beyond Q_A, respectively. F_m at time t is indicated relative to time 0 of illumination at 70 μE m⁻² s⁻¹.