Table 2.

Effects of strong light stress (3 days at 1,600 μmol photons m⁻² s⁻¹) on the V cycle pigments, F_v/F_m, and the level of lipid peroxidation, as measured by the amplitude of the 135°CTL band and the ethane production in leaves of the wild type, the npq4 mutant, and the npq4 npq1 double mutant of Arabidopsis

Arabidopsis	TL, a.u.	Ethane, pmol·g−1 F.W.	Fv/Fm	V + A + Z, ng·mm−2	(A + Z)/V + A + Z)
Wild type
Control	8.4  ±  1.6	248  ±  25	0.81  ±  0.01	10.0  ±  0.3	0.11  ±  0.02
Light-treated	10.5  ±  1.5	261  ±  21	0.72  ±  0.06	27.3  ±  2.1	0.51  ±  0.10
npq4
Control	8.2  ±  2.0	227  ±  82	0.79  ±  0.01	10.8  ±  0.9	0.20  ±  0.02
Light-treated	12.1  ±  1.9	324  ±  26	0.69  ±  0.08	23.1  ±  3.3	0.43  ±  0.09
npq4 npq1
Control	6.3  ±  0.8	186  ±  31	0.78  ±  0.01	10.8  ±  0.5	0
Light-treated	19.6  ±  1.2	610  ±  155	0.60  ±  0.14	29.7  ±  7.4	0.02  ±  0.01

Data are mean values of 3–10 experiments ± SD. F.W., fresh weight.