羊蹄甲属植物种子表面微形态观察

利用光镜和扫描电镜对羊蹄甲属21种(含1亚种、2变种)的种子进行观察,结果显示,羊蹄甲属植物的种子颜色、形状和外种皮纹饰多样,还发现种脐位置、假种皮裂片、拟透镜状突起和种皮表面纹饰有一定的相关性:即没有假种皮裂片,拟透镜状突起在种子表面不明显,具网状纹饰的种子其种脐位于种子亚顶部的位置,而非顶部位置。此外,大部分羊蹄甲亚属种子的表面纹饰为皱波状,而显托亚属的纹饰没有皱波状纹饰,却以网状纹饰居多。分析认为,羊蹄甲属植物中种皮网纹状纹饰可能是比较进化的特征;并认为种脐在亚顶部位置,没有假种皮裂片,拟透镜状突起在表面不明显,具网状纹饰的种子应是羊蹄甲属内较进化的式样。

Spermodermal micro-morphology of Bauhinia ( Leguminosae: Caesalpinioideae )

The seeds of 21 species (including infraspecific taxa) in Bauhinia were studied by LM and SEM. The colors,shapes and the ornamentations of these seeds are various. Some association was found in hilum position,aril-lobes,pseudolens and the ornamentation of seed surface,viz.,in the species without aril-lobes,pseudolens is indistinct in the surface and the ornamentation is reticulate,the position of hilum is subapical rather than apical. And the ornamentations of most seeds in subgenus Bauhinia are rugulose while in subgenus Phanera being reticulate.