Tree peony was famous in the world and its wild species were originated in China. But its low propagation coeffidient and long breeding period have always been the big problems for the production and breeding .Somatic embryogenesis is the important approach for plant regeneration and it has been used successfully for many plants.But the research reports on tree peony were rare.So this research was carried out to set up a steady regeneration system and to provide a platform for the propagation in vitro...