Effect of heptadecanoic acid and stearic acid on conidial pigmentation. FGSC26 (wild type), RYQ11 (ΔmcsA), RYQ25.1 (ΔmcsA/ΔpcsA), and TYQ4.24 (ΔpcsA) were inoculated on solid MM (containing 5 mm glucose), supplemented with 1% tergitol and 20 mm of heptadecanoic acid or stearic acid, and grown for 2 days.