Plant Phytopathology - Garden Work

EurekAlert!: “Phytopathology Research Forum” highlights advances in plant pathology research in China The one-day phytopathology research event saw participation from hundreds of experts in the field, where they exchanged knowledge on the latest research updates in plant diseases and disease control. In one of the few studies to directly investigate the mechanism underlying the effect of essential elements on plant disease resistance, scientists demonstrate that nutrient elements activate immune ... Does anyone know of a eastern tree, suitable for zone 6, that has an interesting winter silhouette?

I like the look of a black gum a few streets over, but I want to make sure that I do't over-look any other, possibly nicer ones, as this will probably be the last tree I ever plant. Thanks.