Fig. 3From: Root system traits impact early fire blight susceptibility in apple (Malus × domestica)Patterns of root area (cm2) and disease severity (%) in four different root area classes (RACs) of ‘M.7’ rootstocks. (a) Different root area classes (RACs) observed in M.7 rootstock, and (b) Disease severity represented as percent lesion length (%) for four M.7 RACs at 8 dai. The different letters mean significant differences at a p-value threshold less than 0.05Back to article page