Fluorescence kinetic and carotenoid compositions. (A) Fluorescence trace of 4 d high light (LHCII+zea) cells. The signal was collected at 680 nm. pH changes are indicated by arrows. (B) Carotenoid composition of the control (before vitamin treatment), Six days normal light (LHCII-only), 3 d high light (containing LHCII+LHCSR1+zea), and 4 d high light (containing LHCII+zea) cells. neo, neoxanthin; vio, violaxanthin; antera, anteraxanthin; lut, lutein; zea, zeaxanthin; beta, β-carotene. The data derive from three replicates.