Relative sensitivity to pH change. A. nidulans strains were grown on YG medium at various pHs (3.8, 4.8, 5.8, 7.0, 8.0, and 9.0). The radial growth rate (cm/day) of each wsc disruptant was divided by that of wt strain AKU89. *, statistically significant difference (P < 0.05) relative to results using standard YG medium (pH 5.8).