Fig. 2

ZtSof1 is required for vegetative cell fusion in Zymoseptoria tritici. All mutant lines derived from the 1E4 strain. a Fusion bridges between blastospore germlings were observed at high cell density for ΔZtKu70 and ΔZtSof1-comp strains but not in the ΔZtSof1 mutant. Black arrows indicate CATs. b VHFs were noticed at low cell density and only for those strain possessing the ΔZtSof1 gene. White triangles point to the fusion bridges between two fused hyphal cells