Figure 10.

Viabilities of dormant A. niger conidia after subjection to heat stress. Conidia were held at 55°C for 20, 60, 90 and 120 min. For all strains, the numbers of counted colonies were normalized to 25 at time = 0 min to avoid differences in numbers of assayed spores. Note that pyrG + observations are horizontally offset to avoid visual overlap. There were no significant differences between the control strains (N402 and pyrG+). Except for the two first time points, the viability of ΔtppB was significantly lower than in N402 (two-way ANOVA, P < 0.01 in 60 and 90 min, and P < 0.05 in 120 min).