Fig. 1.

Synechocystis sp. PCC 6803 wildtype and the PAL mutant were grown in light-limited chemostats and provided with either a orange-red (660 nm) or b blue (450 nm) LED light. Insets show samples taken from steady-state chemostats of the wildtype, which illustrate that the wildtype produced much higher biomass in orange-red than in blue light. Bar graphs show biomass (c), cell counts (d) and cellular Chl a content (e) of each strain at steady state in orange-red (R) and blue (B) light. Biomass is expressed as total biovolume of the cells per L. Data show the averages of three (biomass and cell counts) or two (Chl a content) technical replicates ± SD