Fig. 1

Growth and biomass of the Synechocystis sp. strains PCC 6803 and B12. A, B Graphs show the optical density measured at 750 nm (OD₇₅₀) of Synechocystis sp. strains growing in BG-11 medium N-replete or N-free, in low-light conditions at 35 μmol photons m⁻² s⁻¹ (A) and in high-light conditions at 300 μmol photons m⁻² s⁻¹ (B). Data indicate the average (± SD) of at least three biological replicates. (C) Photos of PCC6803 and B12 cultures grown for 7 days in BG-11 medium N-replete or N-free, in low- and high-light conditions. (D) Whole biomass production, represented as g L⁻¹, including both cell and PHB biomass of PCC 6803 and B12, grown in BG-11 medium N-replete or N-free, in low- and high-light conditions. Data indicate the average (± SD) of at least three biological replicates. * indicates p < 0.05, **p < 0.01, ***p < 0.001 and ****p < 0.0001 (for complete statistical output, see Table S1)