Pseudobulbils Induction,Somatic Embryogenesis and Shoot Regeneration in Rosa multiflora Thunb. An Elite Variety of Rosa multiflora ‘Lushuohong’ Protoplast Isolation and Plant Regeneration from Somatic Embryogenic Cell Suspension Cultures in Rosa multiflora Study on the Cytology of Rosa multiflora Thunb.var.cathayensis Protoplast Isolation and Plant Regeneration from Somatic Embryogenic Cell Suspension Cultures in Rosa multiflora Pseudobulbils Induction,Somatic Embryogenesis and Shoot Regeneration in Rosa multiflora Thunb.