Abstract:Objective :To transfer the effective elements of Bupleurum scorzonerifolium into carrot , and provide theoretical data for the exploitation , improvement and selection of the germplasm of Chinese medicinal plants . Method : The protoplasta of Bupleurum scorzonerifolium irradiated by ultraviolet light (UV) at an intensity of 300 μW·(cm2)-1 for 0,1,2 min respectively were fused with those of carrot Fisch by PEG method . The regenerated clones, derived form a single fused cell, were examined for their hybrid nature by phenotype and Esterase isoenzyme analysis. Result:Nine clones were identified as the somatic hybrids between B. scorzonerifolium and carrot. Conclusion: This provides a firm foundation for the further analysis of the main active components saikosaponin of somatic hybrids and the screening out of high-medicine-content hybrid cell lines.