Figure 7.

Kinetics of Lipid Peroxidation of Arabidopsis Detached Leaves Exposed to HL Stress.

Wild-type, npq1, koLhcb4, and koLhcb4 npq1 mutant leaves floating on water were exposed to HL (800 μmol photons m⁻² s⁻¹, 4°C), and photooxidation was estimated from the extent of lipid peroxidation measured by high-temperature TL. Each experimental point corresponds to a different sample. The kinetic of oxidized lipid accumulation was described by fitting the data set with first-order exponential functions: differential kinetics npq1–wild type (WT) and koLhcb4 npq1–koLhcb4 were calculated on the basis of the first-order exponential functions obtained by fitting experimental points (error bars, 95% confidence level). a.u., arbitrary units.