(Microbial infection) Facilitates the development of the powdery mildew fungus E.cruciferarum. (Microbial infection) May prevent cell death upon A.alternata f.sp. lycopersici (AAL) toxin treatment. Expressed at very low in leaves. Delayed development of the powdery mildew fungus E.cruciferarum. Increased cell death upon A.alternata f.sp. lycopersici (AAL) toxin treatment. Belongs to the BI1 family.