Fig. 1

CltA and CltB are cellobiose transporters which are involved in the signaling response to cellulose. The expression of cltA (a) and cltB (b) was assessed by RT-qPCR in the presence of 1 % cellobiose. The effect of the single deletions of cltA and cltB and the double deletion cltA cltB was assessed on fungal biomass accumulation (DW dry weight) when grown for 48 or 72 h in the presence of 1 % glucose (c) or 1 % cellobiose (d). Cellulase activity (e) was measure in the supernatants of the same strains when grown in minimal medium supplemented with 1 % fructose for 16 h and then transferred to minimal medium containing 1 % avicel for 5 days. Error bars indicate standard deviation for three biological replicates