Figure 6From: Switchgrass (Panicum virgatum L.) polyubiquitin gene (PvUbi1 and PvUbi2) promoters for use in plant transformationHistochemical staining of GUS in the leaves (A, D, G, J), pollen (B, E, H, K) and pistils (C, F, I, L) of mature tobacco plants driven by the 2x35S (A, B, C), PvUbi2 (D, E, F), PvUbi2+3 (G, H, I) and PvUbi2+9 (J, K, L) promoters. Each measurement bar represents 1 cm (leaf), 0.2 mm (pollen) and 1 mm (pistil).Back to article page