Fosetyl-aluminum improves defence against Venturia inaequalis in apple

Abstract: Apple (Malus × domestica Borkh.) is continuously threatened by apple scab caused by Venturia inaequalis. The infection pressure is currently increasing. We examined whether defence priming with fosetyl-aluminum in combination with polyploidy strengthens defence of the apple plants and what are the underlying transcriptomic mechanisms of such an improved defence.