火炬树分泌道的发育解剖学研究

本文报道了火炬树分泌道的结构、分布和发育。火炬树的分泌道是由一层分泌细胞及其外侧1—5层薄壁组织细胞组成的鞘细胞所包围。分泌道主要分布于根、茎、叶、花和果实的维管束的韧皮部内，此外，在茎的髓部也存在散生的分泌道。各类器官中的分泌道都以裂生方式发育；营养器官中的分泌道先于维管分子分化，生殖器官中的则后于维管分子的分化。

DEVELOPMENT ANATOMICAL STUDIES ON THE SECRETORY DUCTS OF RHUS TYPHINA

This paper reports the structure, distribution and development of the secretoryducts of Rhus typhina. The secretory ducts of Rhus typhina are composed of one layer ofsecretory cells and one to five layers of sheath cells. The secretory ducts occur mainly inthe phloem of root,stem,leaves,floral organs and fruits of Rhus typhina,and also in thepith of Rhus typhina. Secretory ducts of schizogenous origin are described. The secretoryducts of vegetative organs origin before vascular element and after vascular element inthe reproductive organs.