Fig. 1

Colony morphology of T. reesei K1 and a representative Δrac1 strain on potato dextrose agar plate. A serial dilution of 10⁴ to 10² spores of the reference strain K1 (a) and ∆rac1 (b) was applied on PDA plates containing 0.1% Triton X-100 and incubated for 72 h at 28 °C