Fig. 8.

Histochemical GUS staining of pCAMBIA-EV and pCAMBIA1305.2 transformed switchgrass. a pCAMBIA-EV callus incubated in GUS staining solution at 37 °C for 4 h. b pCAMBIA1305.2-transformed callus incubated in staining solution at 37 °C for 4 h. c pCAMBIA-EV callus incubated in staining solution at 37 °C overnight. d pCAMBIA1305.2-transformed callus incubated in staining solution at 37 °C overnight. e Switchgrass stems and leaves incubated in staining solution at 37 °C overnight (Left: pCAMBIA-EV transgenic line; right: pCAMBIA-1305.2 transgenic line)