Transgenic potato and tobacco plants with gox gene of Penicillium funiculosum development and analysis
Glucose oxidase (GOX) enzyme can generate H<sub>2</sub>O<sub>2</sub> by the oxidation of glucose in the presence of molecular oxygen. H<sub>2</sub>O<sub>2</sub> has the potential to enhance biotic and abiotic stress tolerance of higher plants. The gene encoding glucose oxidase was isolated from the genomic DNA of Penicillium funiculosum. The GOX gene was cloned under the control of a CaMV 35S promoter into the plant transformation vector pBI121. Potato and tobacco plants were transformed via an Agrobacterium tumefaciens-mediated procedure by selecting for kanamicyn resistance. Stable integration and expression of GO gene in the transgenic lines were ascertained by molecular and biochemical tests. Transgene integration in the transformants was confirmed by PCR for GOX gene and multiplex PCR for GOX gene, NOS-terminator, actin gene, VirE2 gene. Histochemical analyses for H<sub>2</sub>O<sub>2</sub> production were studied using starch-KI medium.