FIG. 1.
Comparison of the effects of relatively high Ci,i deficiency (K medium) and low Ci,i deficiency (Na medium) on (a) growth, (c) volumetric MCYST concentrations, (e) MCYST cell quotas, (b) relative units of variable fluorescence (Fv, rel), (d) the percentage of extracellular MCYSTs, and (f) the total MCYST production of M. aeruginoa PCC 7806 (growth parameters for Na medium, μmax = 0.4 day−1 and Xmax = 8.7 × 106 cells ml−1; growth parameters for K medium, μmax = 0.22 day−1 and Xmax = 7.6 × 106 cells ml−1). All symbols and bars indicate means, and standard errors of three replicates are indicated by error bars. See Table 1 for statistical tests of differences between treatments.