FIG. 3.
Dark-light changes in a growing M. aeruginosa PCC 7806 batch culture, including (a) cell concentration (note the logarithmic scale), (b) pH value and pH change (Δ pH) between two consecutive sampling points, (c) total carbon concentration, (d) phycocyanin cell quota, (e) relative units of the variable fluorescence (Fv,rel), and (f) MCYST cell quota. All values are means ± standard errors obtained from three replicates. Fv, variable fluorescence; def., deficiency; invar./decr., invariate/decreasing.