摘要
本文对珙桐、喜树和蓝果树等三种植物次生木质部的导管分子进行了初步比较观察，珙桐的导管分子多数为梯状穿孔板，但有的可见到单穿孔；喜树和蓝果树的导管分子均无单穿孔；珙桐的梯状穿孔板的横隔数明显少于喜树和蓝果树的．三种植物导管分子还存在一些其它差异．
This paper preliminarily makes a comparative study on vessel elements of secondary xylem in Camptotheca acuminata. Nyssa sinensis and Davidia involucrata. Most of vessel elements in D. involucrata have scalariform perforation plates and only a few of them have simple perforation plates. The other two species have no simple perforation. The scalariform perforation plates of D. involucrata have The fewest bars in those of the three species.In addition,some other differences in vessel elements between these three species are also discussed.
关键词
蓝果树科植物
次生木质部
导管分子
珙桐
喜树
Vessel elemts
D. involucrata Baill
C. acuminata Decne
N. sinensis oliv
Comparative studies
