Fig. 3
Effect of 7dSh (1) on the growth and photosynthetic oxygen evolution of A. variabilis cultures. a Growth of A. variabilis (OD750) at different concentrations of 7dSh after 48 h of incubation. Cultures were inoculated to an OD750 of 0.05, 0.2, or 0.5 (marked by dashed lines). 7dSh in aqueous solution was added at time 0. Significant differences between adjusted initial OD750 and OD750 after 48 h were analyzed in a one sample t-test (*p-value < 0.05; **p-value < 0.01; ***p-value < 0.001; n.s., not significant). b Photosynthetic oxygen evolution by A. variabilis (initial OD750 = 0.3) in the presence of 7dSh or neomycin (positive control) or without supplementation (BG11, negative control). 7dSh (ca. 50 µM) and neomycin (ca. 65 µM) were added as aqueous solution. Values in both graphs represent the mean values of three biological replicates; standard deviations are indicated. Dots indicate data distribution. Source data are provided as a Source Data file
