FIG. 1.

Accumulated biomass of A. maxima filaments after light-limited growth in variable concentrations of sodium chloride, added to ZM (total sodium content, 0.24 M). A. maxima was initially grown to a cell density of 0.7 g (dry weight) of cells (liter culture)⁻¹ for 14 days. Subsequently, filaments were resuspended at this concentration in fresh Zarrouk's medium supplemented with 0 to 1.00 M additional sodium chloride, added every 2 to 3 days in 0.25 M increments, and the dry weights of cultures were measured 2 weeks after initial division of the 1-liter cultures. Light intensity equaled 40 μE m⁻² s⁻¹, with 12 h light/12 h dark. Data were obtained from single dry weight measurements, with propagated estimated errors.