Stage-specific functional relationships between Tub1 and Tub2 beta-tubulins in the wheat scab fungus Fusarium graminearum.

•Two beta tubulin genes with similar subcellular localization.•Overlapping functions of two beta-tubulin genes at asexual stage.•Distinct functions of two beta-tubulin genes in DON production.•Increased protein expression of beta1 tubulin in beta2 tubulin deletion background.