中国鼠李科植物的叶表皮微形态

Leaf Epidermis Micromorphology of Rhamnaceae in China

利用扫描电子显微镜对鼠李科(Rhamnaceae)14属41种4变种的叶表皮形态进行了观察。结果表明:鼠李科植物叶表皮纹饰为皱状或网状,表面近光滑、具条纹或鳞片状粗糙;除蛇藤(Colubrina asiatica)叶上表皮有少量气孔外,其余植物气孔只存在于下表皮,椭圆形、卵形或圆形,孔盖光滑或具波纹状、颗粒状、瘤状、鳞片状附属物;孔盖内缘光滑、浅波状或外卷。这些叶表皮微形态对于一些种及种下分类群的划分有一定的参考作用。

Leaf epidermis characteristics of 41 species and 4 varieties,belonging to 14 genera in Rhamnaceae were observed under scanning electron microscope（SEM）.The results showed that the epidermis ornamentation of leaf in Rhamnaceae were corrugate or reticulate,surface nearly smooth with striate or scale.Stomata occurred only on abaxial surface except for Colubrina asiatica,and they are elliptic,ovate or round.The stomatal lids were smooth or had striate,granular,nodular,or scale appendages,and its inner margin were smooth,shallow wavy or revolute.The leaf micromorphology features could be used to distinguish some specific or intraspecific taxa.