Table 1.

Comparative image analysis with Image J of hyphal morphologies from T. reesei ∆rac1 strains compared to reference strain K1 during growth on lactose for 27 h, mean values and standard deviation are given

	K1	Δrac1
Mycelium length (µm)	650.4 ± 189.5	467.3 ± 208.9
Central hyphal length (µm)	498.8 ± 128.0	214.4 ± 80.3
Average branch length (µm)	56.0 ± 28.4	70.7 ± 36.5
Number of hyphal apices	4.1 ± 1.3	5.4 ± 2.0
Diameter (µm)	4.3 ± 1.5	6.4 ± 0.4

n = 25 per strain, samples of three different biological replicates were drawn from liquid cultures after 27 h, all values shown were tested with Student’s-t-test p < 0.05 and were all significantly different for K1 and ∆rac1 strains