TABLE 2.

Chlorophyll fluorescence parameters in the different light set-ups.

Set-up	Fv/Fm	qT1	qT1 approx	qT2	qT2 approx	F r	ΔFr
Internal LED lights	WT: 0.76 ± 0.01 stn7: 0.79 ± 0.01	WT: 0.028 ± 0.008 stn7: −0.025 ± 0.002	0.053 ± 0.007	WT: 0.049 ± 0.022 stn7: −0.032 ± 0.003	0.082 ± 0.019	WT: 0.67 ± 0.05 stn7: −0.2 ± 0.02	0.87 ± 0.087
PSII-/PSI-light system	WT: 0.81 ± 0.00 stn7: 0.77 ± 0.03	WT: 0.04 ± 0.02 stn7: 0.01 ± 0.01	0.05 ± 0.071	WT: 0.07 ± 0.013 stn7: 0.027 ± 0.021	0.047 ± 0.034	WT: 0.47 ± 0.2 stn7: 0.04 ± 0.08	0.43 ± 0.11
Dark/white- light system	WT: 0.82 ± 0.00 stn7: 0.77 ± 0.01	WT: 0.101 ± 0.014 stn7: 0.044 ± 0.024	0.057 ± 0.025	WT: 0.166 ± 0.036 stn7: 0.064 ± 0.017	0.102 ± 0.036	WT: 0.9 ± 0.02 stn7: 0.6 ± 0.03	0.3 ± 0.066

Calculation of Chl fluorescence parameters was done with data obtained in experiments shown in Figure 1. Results are means of three independent biological replicates. Standard deviations are given. Calculation of F_v/F_m: F_m − F₀/F_m. Calculation of qT (state transition dependent quenching) with the saturation pulse method was done separately for the transitions from state 2 to state 1 (qT₁) and from state 1 to state 2 (qT₂) as: qT₁ = (F_m1 − F_m2)/F_m1 and qT₂ = (F_m1 − F_m2′)/F_m1; with F_m1, F_m2 and F_m2′ as maximum fluorescence yields obtained in stable state 1 and 2, respectively (compare Supplementary Figure S1). Approximation of state transitions in the light quality and dark-light shift systems is calculated as: qT_{n approx} = qT_{n WT}–qT_{n stn7}. Calculation of F_r according to Haldrup et al. (2001): F_r = [(F_i′ − F_i) − (F_ii′ − F_ii)]/(F_i′ − F_i) with F_i and F_ii as fluorescence yield in state 1 or 2, and with F_i′ and F_ii′ as fluorescence yield in state 1 or 2 directly after illumination shift. Approximation of state transitions on base of F_r in WT and stn7 is given as: ΔF_r = F_{r WT} − F_{r stn7}.