Figure 2.

Cell-to-cell movement of the GFP-expressing BYV (BYV-GFP) and its mutant variant lacking most of the HSP70h ORF (BYV-GFP-ΔXho) in mature leaves of Claytonia perfoliata. Photographs were taken with a fluorescent microscope and a GFP-specific filter. (Scale bars represent 25 μm.)