Abstract: The materials of cutting base of Picea koraiensis were fixed in FAA solution at July-August, 1992, and the anatomical study on occurrence of adventitious roots were carried out through paraffin-cut section method. The resuls show that there are two ways of inducing root primordia from cutting of Picea koraiensis. One is the callus rooting type. the primordia forms from the regenerated cambium of calli or from the proto-yascular cambium when calli form at vascular cambium of stem. The oher is non-callus rooting type, the axial primordia of adventitious roots from directly from vascular cambium, cortex at cut and the Parenchyma between primary xylem and second xylem the radial primordium of adventitious roots form from parenchyma of vascular cambium above 0.1-0.3cm of cut of stem, the intersect between vascular cambium and xylem lay and leaf gap ect. Both the numbers and time of development of adventitious roots are significant different among individuals.

Key words: Picea koraiensis, Cutting, Adventitious roots, Anatomy