In the study,by investigating the factors influencing the transformation efficiency of Lilium ‘Siberia',a genetic transformation system of scales was optimized. By Agrobacterium-mediated,the AtDREB2A gene was transformed into‘Siberia'. The results indicated that the highest rate of kanamycin- resistant plants was obtained through the following transformation procedure:After preculture for 3 d,the explants were infected for 20 min with diluted OD600 = 0.8 Agrobacterium tumefaciens solution and then co-cultiv...