Fig. 4

Evaluation of cell recovery under green light induction at various cell growth phases. a Time course of cell growth. b Cell recovery from cultures exposed to green light for 2 h. Cell recovery is shown as the ratio (%) of recovered cells (wet weight) to total cells (wet weight) in culture in a tube. The asterisks indicate statistical differences from the cells exposed to green light on stationary phase (*P < 0.05 and **P < 0.01 based on Dunnet’s t-test). A Cells exposed to green light at 19–21 h of culture, early log phase; B cells exposed to green light at 23–25 h of culture, middle log phase. C Cells exposed to green light at 25–27 h of culture, late log phase; D cells exposed to green light at 40–42 h of culture, stationary phase