山茱萸果皮的解剖学研究

本文报导了山茱萸果皮的解剖学研究结果.外果皮由一层表皮细胞构成.中果皮外方为3-4(5)层厚角组织细胞,这些细胞通常含有单宁;其内方包含薄壁细胞、单宁细胞和8束维管束.单宁细胞成团或零星分布于薄璧细胞中,前者的体积明显大于后者.单宁细胞的单宁与多糖结合在一起.维管束含有环纹、螺纹、梯纹、网纹及孔纹管胞,还有少数散生的纤维.内果皮高度木质化,主要由多种形状的石细胞组成,其间分布了肉眼可见、排列成环状的异细胞,偶见少数生活石细胞及薄壁细胞.内果皮有3束维管束.

ANATOMY OF THE PERICARP OF CORNUS OFFICINALIS

Anatomical features of the pericarp of Cornus officinalis Sieb. et Zucc. are reported. The exocarp contains only one layer of epidermal cells. The outer part of mesocarp is composed of 3 - 4(5) layers of collenchyma cells which always contain tannin, and the inner part are parenchyma cells, tannin cells as well as eight collateral vascular bundles. Tannin cells are scattered in group or singly among parenchyma cells. Volume of tannin cells is obviously bigger than that of parenchyma cells. Tannin in cells is always in combination with polysaccharides. The vascular bundles are with tracheids and a few fibers. Five types of tracheids, i.e. annular, helical, scalariform, reticulate and pitted trecheids are found. The endocarp is strongly lignified, and is mainly constructed by sclereids which vary greatly in shape. Besides, many idioblasts, which are so large as to be seen by naked eyes, are distributed among sclereids and arranged in a circle. In endocarp, three vascular bundles occur and occasionally living sclereids and parenchyma cells can be found.