Fig. 6

Biomass productivity of UVM4 and bkt5. A–D Growth curves of UVM4 (black) and bkt5 (red) strains cultivated at 100 and 3000 μmol photons m⁻² s⁻¹ in HS or TAP medium with 3% CO₂, monitoring OD at 720 nm. In the case of cells grown at 3000 μmol photons m⁻² s⁻¹, when stationary phase was reached, a second growth cycle was performed diluting cells at 0.1 OD. E, F volumetric biomass (E) and maximal productivity (F) in the different growth conditions. For the growth at 3000 μmol photons m⁻² s⁻¹, data were measured at the end of the first (c1) and second cycle (c2). Error bars are reported as standard deviation (n = 4). Values significantly different comparing bkt5 with UVM4 are reported with * (Student’s t test, P < 0.05)