【摘要】 1990年7月5日在帽儿山实验林场进行了长白落叶松嫩枝扦插试验,在插穗基部切口形成愈伤组织后不定根钻出体外前,定时切取穗条基部0.5cm长的材料固定于FAA液中,用石蜡制片法室内解剖研究。结果表明,落叶松从扦插到生根需要40d,插穗诱生根原基属内生源,它们来自两种途径:一种是插条基部切口产生愈伤组织,由愈伤组织维管形成层产生诱生根原基,而形成根。另外一种是皮部生根型,在插穗基部形成层与木射线的交界处产生分生组织细胞团,逐渐形成诱生根原基。两种生根类型在不定根突破外层组织时,均需经过挤压破碎和酶解作用。更多还原

【Abstract】 The experiment on the green shoot cutting propagation of Larix olgensis was made in the Maoer Mountain Forest Farm on June 5,1990. After the callus formed on the cutting base, adventitious roots came out, and the materials were collected from the cuttingbase and put into FAA solution. By the paraffin sections and anatomical observation, the results indicated that it needed 40 days from the cutting to the rooting; The induced primordium of the cutting was endogensis in origin, which came from: (1) vascular cambium of the callus, and became roots;(2) meristematic cell population in the intersectbetween the cambium and xylem ray of the cutting base. There were extruding, crushing process and enzymolysis when the adventitious roots broke through the outer layers in above two rooting types.更多还原