红皮云杉茎的解剖结构与插条不定根形成的研究

１９９２年７－８月定时固定红皮云杉插条基部材料于ＦＡＡ液中，石蜡制片法室内解剖研究不定根的发生。结果表明：红皮云杉插条诱发根原基的来源有两种途径。一种是愈伤组织生根型，在愈伤组织的再生形成层处，或茎的维管形成层诱发根原基；另一种是非愈伤组织生根型，在插条切口处的维管形成层、皮层或初生木质部与次生木质部间的薄壁组织较深的部位，直接产生纵向不定根原始体，有的在距离切口０．１－０．５ｃｍ以上茎的维管形成层，维管形成层与木射线的交界处及叶隙等薄壁组织产生径向不定根。不同个体间产生的不定根数量及发育的早晚差异较大。

STUDIES ON ANATOMICAL STRUCTURE OF STEM AND FORMATION OF THE ADVENTITIOUS ROOT OF CUTTING OF PICEA KORAIENSIS

he 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.