Fig. 4.

Comparisons of the fluorescence decay between wild type (Left, gray) and npq4 (Left, red) and between npq1 (Right, gray) and npq1 npq4 (Right, red) for different values of the average fluorescence lifetime. The fluorescence lifetime decays of wild type and npq4 in the dark-adapted state (A), after 30 s and 31.5 min of illumination for wild type and npq4, respectively (C), and during the second illumination period after 45 min of first illumination period followed by 3 min in the dark, 3 s and 8 s of illumination for wild type and npq4, respectively (E). The fluorescence lifetime decays of npq1 and npq1 npq4 in the dark-adapted state (B), after 20.5 min of illumination (D), and during the second illumination period after 2.5 min of illumination (F). Leaves were illuminated with 500 μmol photons⋅m⁻²⋅s⁻¹ actinic light.