Disruption of the pullulan synthetase gene in siderophore-producing Aureobasidium pullulans enhances siderophore production and simplifies siderophore extraction

► The pullulan synthetase gene (PULl) in the siderophore-producing A. pullulans HN6.2 was disrupted. ► Siderophore production by the disruptant DPS1 was enhanced. ► The siderophore extraction was simplified.