Characterisation of the melano protein of Venturia inaequalis and its impact on plant pathogenesis Apoplastic fluid bifunctional enzyme glucanase Malus domestica plant fungal protein interactions protease melanoprotein surface proteins Venturia inaequalis. Apoplastenwaschflüssigkeit bifunktionales Enzym Pflanze Pilz Protein Interaktionen Oberflächenproteine