Fig. 4

Non-photochemical quenching (NPQ) of Wt and the Δzl mutant. a, b Measurement of NPQ kinetics of low light (LL, a) or high light (HL, b) acclimated cells using actinic lights of 2400 μmol photons m⁻² s⁻¹. c, d NPQ values after 10 min of illumination with different actinic light intensities measured in low light (LL, c) or high light (HL, d) acclimated cells. Closed symbol refers to cells grown at atmospheric CO₂, while open symbols to cells grown at 5% CO₂. All the experiment was performed in biological replicates (n = 4). Statistical analysis was performed using Student’s t test (*p < 0.05)