Figure 3

Light microscopy images of U. cynodontis 2217 (A, C) and U. maydis 2162 (B, D) cells. A and B: controlled batch fermentation in a bioreactor containing batch medium (200 g L⁻¹ glucose, 4 g L⁻¹ NH₄Cl, 30°C, 80% DOT, at pH 6.0). C and D: System Duetz cultivations containing screening medium (45.5 g L⁻¹ glucose, 0.8 g L⁻¹ NH₄Cl, 33 g L⁻¹ CaCO₃, 30°C, 80% DOT, magnification 400×).