Figure 4.

Effects of acclimation under moderate light intensity with/without nitrate on the pH (A), cell number changes (B) in the 4 days induction, and biomass (C), astaxanthin content (D) and astaxanthin productivity (E) at the end of the 5 days procession. Dark‐grown algal cells were acclimated for 1 day under moderate light (25, 50, 100 μmol photons m⁻² s⁻¹) and N‐replete (/N+) or N‐depleted (/N−) conditions, before being subjected to high‐light (400 μmol photons m⁻² s⁻¹) and N‐depleted induction for 4 days. The acclimated cells were compared to those subjected to induction without acclimation (400/N−).