Dynamic variation of biomass and content of polysaccharide and alkaloid in protocorm like bodies from Dendrobium officinale at different light intensities and incubation time Rapid Propagation of Cymbidium kanran Makino Dynamic variation of biomass and content of polysaccharide and alkaloid in protocorm like bodies from Dendrobium officinale at different light intensities and incubation time THE CHANGES OF ANTIOXIDANT ENZYME ACTIVITIES AND SOLUBLEPROTEINS DURING DIFFERENTIATION OF SHOOTS AND ROOTS FROM PROTOCORM-LIKE BODIES (PLBs) IN Dendrobium nobile in vitro Effect of Fast Neutron Radiation on the Proliferation and Differentiation of Protocorm-like Bodies and Seedlings Stem Segments of Phalaenopsis Cluster shoots induction from root-tip segments of Dendrobium officinale