cgopt1 -silenced mutants exhibit reduced pigmentation and sporulation. A. Wild-type, Ori51 and Ori83 strains were cultured on REG plates. Picture was taken after 8 days. B. Sporulation assay: Ori51 (black bars) and wild-type (empty bars) strains were cultured on EMS agar medium in 90-mm Petri dishes. Spores were harvested and counted after 5 days. Data from one experiment are presented. Bars are the mean and SD of five replications. Differences between wild type and the mutant were found significant according to t-test analysis (P < 0.05) in each of the time points (days 4, 6, 8, and 10). Repetition of experiments led to similar results.