油松树脂道的发育过程和组织化学研究

利用薄切片和组织化学方法对油松茎皮层树脂道发育过程中上皮细胞内树脂滴和淀粉粒的动态变化进行了观察研究。在树脂道原始细胞阶段，树脂滴稀少，淀粉粒２－５个；树脂道形成期间，树脂滴数量逐渐增加，体积增大，淀粉粒也呈递增趋势，两者都均匀分布于细胞质中；树脂道成熟阶段，上皮细胞内树脂滴明减少，主要分布于靠近腔道一侧的细胞质中，淀粉粒数量变化不大，而体积明显减小，通常分布于远离腔道一侧的细胞质中，在树脂道发育

HISTOCHEMISTY OF RESIN DUCT DEVELOPMENT OF PINUS TABUL AEFORMIS CARR

With the help of methods of thin-section and histochemistry dynamic changes of resin droplets and starch grains in resin duct cells at different developmental stages of resin duct are observed and studied.At the initial stage,few resin dropletS and 2-5 starch grains occur in the cytoplasm,at formative stage,the number of resin droplets gradually increasee.their volumeenlarges,starch grains changes with a same trend,both of them all are evenly distributed in the cytoplasm.At the mature stage,the number of resin dro plets obviously decreases, most of them occur in the cytoplasm near lumen,no great change take places in the number of starch grains,but their volume apparently contracts,usually they are present in the cytoplasm far away from lumps. During the development of resin duct,no,obvious change appears in the number and volume of resin droplets and starch grains in sheath cells.