Figure 1.

Synechocystis growth cycle represented on a log(cell) basis (A, C, and E) and daily number of divisions (B, D, and F) when grown on 10 different culture conditions. Cultures on nitrate (A and B), ammonium (C and D), and urea (E and F) were submitted to two different light intensities, 50 µmol photons m⁻² s⁻¹ (red) and 200 µmol photons m⁻² s⁻¹ (blue). Cultures grown on ammonium and nitrate were supplemented with 2.5 mm bicarbonate (triangles) or not supplemented (circles).