Fig. 1From: Identification of alcohol stress tolerance genes of Synechocystis sp. PCC 6803 using adaptive laboratory evolutionSpecific growth rates of the parental and the evolved strains under different concentrations of isobutanol. The asterisks indicate significant differences between the parental and the evolved strains (t test, P < 0.05). The specific growth rate was calculated from an OD730 of 0 and 48 h of each batch culture. Error bars represent standard deviations of three replicatesBack to article page