中药秦艽根内中柱裂分的发育解剖学研究

通过发育解剖学研究表明，秦艽根的初生结构正常，初生木质部四原型。次生生长早期阶段也是正常的，但天以后的次生生长过程中，由于木质部内部分薄壁细胞的分裂，且迅速 化成异常形成层细胞，并与原维管形成层相连，从而形成多个新的形成层环，将木质部柱分为几个子木质部。

DEVELOPMENT ANATOMY OF STALAR DIVISIONIN CENTIANA MACROPHYLLA

The paper is concerned with the process of stalar division in G. macrophylla root. The recent results of an experiment in developmental anatomy show that the primary structure of G.macrophlla is normal,and early stage of secondary growth is normal too. In the course of later process of seconfary growth,because the division of parenchyma inner xylem and become innormal combium quickly and connect with vascular cambium, forming a new cambium circul. Therefore the xylem are divided into several four to six parts,the new cambium divided the xylem and phloem cells then the statar are divided into several independent steles.