RESEARCH AND APPLICATION OF PLANT PROTOCORM-LIKE BODY CONSTITUTIVE EXPRESSION OF RaWUS GENE IN Rosa canina ON MORPHOLOGICAL ALTERATION OF TRANSGENIC TOBACCO LEAVES Cloning and Expression Analysis of PIN1 and PIN2 Encoding Auxin Efflux Carriers in Rosa canina Cloning and Expression Analysis of PIN1 and PIN2 Encoding Auxin Efflux Carriers in Rosa canina Induction and Identification of Autotetraploids in Dendrobium Overexpression of RaWUS Gene of Rosa canina Inducing Shoot Regeneration from Root Tip of Transgenic Tobacco Review of Research on the Plant Tissue Culture of Phalaenopsis hybrid Colchicines Chemical Induction During Propagaion of Protocorm-like Bodiesof Oncidium in Liquid Culture Review of Research on the Plant Tissue Culture of Phalaenopsis hybrid Efficient Somatic Embryogenesis from Leaf Explants of Phalaenopsis in vitro Culture and Histological Observations Efficient Somatic Embryogenesis from Leaf Explants of Phalaenopsis in vitro Culture and Histological Observations Colchicines Chemical Induction During Propagaion of Protocorm-like Bodiesof Oncidium in Liquid Culture Induction and Identification of Autotetraploids in Dendrobium Effect of Different Hormone on Rapid Propagation of Phalaenopsis OPTIMIZATION OF CULTURE CONDITIONS FOR GROWTH AND ROOTING OF PROTOCORM-LIKE BODIES OF Dendrobium nobile in vitro