Figure 3.

Induction of NPQ in C. reinhardtii strains. Cells were grown at an incident PFD of 70 μmol photons m⁻²⋅s⁻¹ and dark-adapted overnight. Fluorescence was measured before, during, and after exposure to actinic light (1,160 μmol photons m⁻²⋅s⁻¹) in air, and NPQ was calculated as (F_m − F′_m)/F′_m. The white bar above the graph indicates the period of illumination with high light (HL); the black bar indicates illumination with weak far red background light.