Fig. 4

Impact of growth limiting nutrients on P _tad1 activity. Specific promoter activity (GFP over biomass, normalized against the wildtype) for U. maydis P _tad1- gfp cultivated in MTM containing 0.5 g L⁻¹ KH₂PO₄ with 0.8 g L⁻¹ (green), 1.6 g L⁻¹ (blue), and 3.2 g L⁻¹ (black) NH₄Cl, and 0.1 g L⁻¹ KH₂PO₄ with 3.2 g L⁻¹ NH₄Cl (red). Single values are shown for two biological replicates (n = 2; diamonds) and the mean value (line)