中国番荔枝科8属植物叶的扫描电镜观察

利用扫描电子显微镜（SEM）对中国番茄枝科8属28种植物叶表皮的微形态进行了观察比较研究。结果表明8属植物叶片的表皮微形态在属级水平上较为稳定且具有较明显的属间差异。紫玉盘属具有星状毛；哥纳香属具有质状毛和单列丝状毛两种类型表皮毛；蒙蒿子属具有棍棒状毛；而其它属只具单列丝状毛；瓜馥木属叶远轴面表皮细胞外平周壁中央均向外突起形成一个乳突；鹰爪花属的气孔器具有双拱盖；银钩花属和蕉木属的气孔器突起，但前者的表皮细胞垂周壁直，而后者表皮细胞垂周壁深波状；金钩花属气孔器周围的角度层呈瘤状突起。因此，可以利用这些叶表皮的微形态特征将8属植物相互区别开来。

Studies on epidermal micromorphology of eight genera in Annonaceae from China by SEM

The epidermal micromorphological characters of 8 genera with 28 species of plants in Annonaceae were comparatively studied by scanning electron microscopy (SEM). The results showed that epidermal micromorphological characters among 8 genera were relatively stable at genus level. For example, there are 4 types of hairs in 8 genera, Uvaria possesses stellate hairs, Goniothalamus has both peltate and filiform hairs, and Anaxagorea possesses clavate hairs , other genera only possess filiform hairs; abaxial epidermal cells of all species in Fissistigma are papillose; the stomata apparatuses appear double rims in Artabotrys ; in Mitrephora and Oncodostigma the stomata apparatuses are obviously raised over the level of unspecialized epidermal cells, but in the former the anticlinal walls of epidermal cells are straight and cuticular surface is very smooth, in the latter the anticlinal walls of cells are sinuate and some of stomata are covered with cuticule; and in Pseuduvaria the cuticular pattern around stomata apparatus is bulge ridges. Therefore, according to above mentioned micromorphological differences of leaves 8 genera can be identified each other.