丛藓科（Pottiaceae）植物叶细胞形态特征及其系统学意义

通过光学显微镜（LM）和扫描电镜（SEM）观察了17属国产丛藓科（Pottiaceae）植物叶中上部细胞的形态特征，结果表明：丛藓科植物的叶中上部细胞的形状、大小及表面形态等特征上具较大相似性；据细胞表面特征，叶细胞可分为无疣或具乳突、具圆疣以及具分枝的马蹄形疣3种类型，且该特征在丛藓科不同属、种间有较大的区别。因此，叶细胞形态特征可为丛藓科植物属级和亚科级的划分提供细胞形态学依据。

Leaf Cell Morphology Characteristics of Family Pottiaceae and Systematic Significance

The upper laminal cell morphology of 17 genus of the family Pottiaceae were observed by light microscope (LM) and scanning electron microscope (SEM). The results show that the upper laminal cells of Pottiaceae have large similarity in cell shape, size and surface characteristic. According to its surficial characteristic, cells of Pottiaceae can be divided into three types: smooth or mammillae, hemispherical papillose and dichotomous horseshoe papillose. In addition, there are distinctive differentiations among different genus and species. The conclusion is drawn that leaf cell morphological characteristics can provide evidence for Pottiaceae on the delimitation of genus and subfamily.