赤爮亚族植物营养器官的比较解剖

COMPARATIVE ANATOMY OF NUTRITIVE ORGANS OF THE SUBTRIBE THLADIANTHINAE(CUCURBITACEAE)

对赤 亚族３属共１２种植物的营养器官进行了比较解剖学研究，其结果是：１．在卷须的解剖结构上，赤 属和白兼果属有明显的区别。前者具周维管纤维，但其维管束发育很差；后者不具周维管纤维，但其维管束发育良好。从系统演化上来说，完善的维管系统显然比周维管纤维有更强的机械功能。２．草酸钙盐的结晶体、硅质细胞和钟乳体分别存在于白兼果属、罗汉果属和苦瓜属植物中，而在赤 属植物中未发现上述结构物质。３．比较解剖学的证据部分地支持了赤属和白兼果属的近缘关系以及赤 属是赤 亚族中相对原始的分类群的观点。

This paper deals with comparative anatomy of nutritive organs of 12species of the genera Thladiantha,Baijiania ane Momordica.The conclusions are as follows: 1.On the structure of tendrils, the differences between Thladiantha and baijiania are evident.The former has the perivascular fibers and the vascular bundles developed weakly; and on the other hand,in the latter there is no perivascular fibers ar all and the pvascular bundles well developed.It is considered that a completed vascular system is stronger than the perivascular fibers for the mechanical function of plants in Cucurbitaceae.2.Crystals, silica cells andcystoliths are respectively present in the plants of Baijiania, Siraitia and Momordica, but they are not found in Thladiantha.3.The evidence of comparative anatomy suggests that Thladiantha is closely related to Baijiania,but the latter is more advanced than the former in phylogeny.