珊瑚菜植株分泌道发育和分布的解剖学观察

利用植物解剖学方法对珊瑚菜（Glehnia littoralis Fr．Schmidt ex Miq．）体内分泌道的发育和分布进行了观察。结果表明，珊瑚菜的分泌道有分枝，为溶生型，由1层分泌细胞围绕腔道而成。珊瑚菜叶片的分泌道发育较早，在幼叶阶段即发育成形。在根的次生韧皮部、根状茎的皮层和靠近初生木质部的髓部、叶脉的薄壁组织、叶柄维管束周围和厚角组织内侧的薄壁组织、花序轴正对维管束的皮层薄壁组织中以及果实的果壁维管束内外侧的薄壁组织中均分布有分泌道，分泌道在珊瑚菜体内分布广泛。

Anatomical observation of development and distribution of secretory duct in Glehnia littoralis

The development and distribution of secretory duct in Glehnia littoralis Fr. Schmidt ex Miq. have been observed by the plant anatomical method. The result shows that the secretory duct of G. littoralis has branches which is lysigenous type. Each secretory duct consists of a layer of epithelial cells encircling a round canal. The secretory duct in leaf of G. littoralis developes early, and has developed to basic formation in spire. The secretory ducts exist in the secondary phloem of root, in the cortex and pith approaching the primary xylem of rhizome, in the parenchyma of the leaf vein, in the parenchyma around the vascular and inside of the collenchyma of petiole, in the parenchyma facing each vascular bundle of rachis and in the parenchyma inside and outside of the vascular bundle of fruit wall. It is showed that the secretory ducts widely distribute in every organ of G. littoralis.