Table II.

Chl a fluorescence parameters q_P, NPQ, q_E, q_T, and q_I of adg1-1/tpt-1 compared with the wild type

Rosette leaves were illuminated for 4 min at the PFD indicated and darkened for a further 16 min while supplying saturating light pulses at increasing time intervals. The Chl a fluorescence parameters were determined graphically from the relaxation kinetics shown in Supplemental Fig. S2, assuming a similar antenna fluorescence in adg1-1/tpt-1 plants as in wild-type plants. The data represent means ± se of three to five measurements. Statistical analysis was performed according to the Welch test. Note that the individual NPQ types are correlated as follows: (1 − NPQ) = (1 − q_E)·(1 − q_T)·(1 − q_I).

Fluorescence Parameters	PFD
	240 μmol m−2 s−1		680 μmol m−2 s−1
	Wild Type	adg1-1/tpt-1	Wild Type	adg1-1/tpt-1
1 − qP	0.244 ± 0.049	0.597 ± 0.006a	0.483 ± 0.029	0.634 ± 0.025a
NPQ (qN)	0.623 ± 0.033	0.552 ± 0.046	0.774 ± 0.016	0.796 ± 0.022
qE	0.456 ± 0.045	0.227 ± 0.058a	0.680 ± 0.029	0.589 ± 0.047
qT	0.118 ± 0.001	0.117 ± 0.010	0.112 ± 0.007	0.166 ± 0.033
qI	0.216 ± 0.010	0.342 ± 0.045a	0.200 ± 0.025	0.401 ± 0.017b

^aP < 0.05.

^bP < 0.02.