Fig. 3From: Quantitative analysis of the effects of morphological changes on extracellular electron transfer rates in cyanobacteriaFerricyanide reduction rates. Error bars show ± 1 SEM. To assess significance of the pairwise difference in rates, a one-tailed Student’s t test at 5% significance level was conducted, with alternative hypothesis that reduction rates are higher for the continuously diluted cultures. Significant p values are asterisked (above bars)Back to article page