Fig. 2

Growth of wild type (WT), SbtA-overexpressing (A) and BicA-overexpressing (B) strains. a The response of the cells to different light intensities. This experiment was done in a multi-cultivator (MC1000-OD) with air bubbling. The OD after 5 days of growth at different light intensities was measured. b Growth curve in Dreschel (gas-washing) bottles with air bubbling. *p < 0.05 for both the strains A and B compared to WT cells for the same day. c Growth curve with 1% CO₂ bubbling. *p < 0.05 for both the strains A and B compared to WT cells for the same day. d Growth curve with 3% CO₂ bubbling. *p < 0.05 for both the strains A and B compared to WT cells for the same day. e Biomass productivity with the bubbling of air, 1% or 3% CO₂ after 5 days of growth. *p < 0.05 compared to WT cells for the same CO₂ level. f Growth of cells in long-term culture with 1% CO₂ bubbling. *p < 0.05 for both the strains A and B compared to WT cells for the same day. n = 2 for the long-term culture, n = 3 for all the other experiments