Fig. 5From: Characterization of a strong and constitutive promoter from the Arabidopsis serine carboxypeptidase-like gene AtSCPL30 as a potential tool for crop transgenic breedingGUS histochemical staining of transformed maize calli. Resistant calli were incubated in staining solution at 37 °C for 24 h. Finally, the samples were observed and photographed after decolorizationBack to article page