国产柿属(Diospyros)的叶表皮形态研究及其分类学意义

Leaf Epidermal Morphology of Diospyros from China and Its Taxonomic Significance

摘要:

为了解柿属（Diospyros）植物的叶表皮特征，在光学显微镜下观察了46种2变种植物的叶表皮微形态特征，并进行了主成分分析。结果表明，柿属植物的叶表皮微形态可分为2组：A组的表皮细胞为不规则形，垂周壁浅波状或深波状；B组的表皮细胞为多边形，垂周壁平直或弓形。气孔全部位于下表皮，以无规则型为主，但同时有辐射型、环列型和十字型气孔存在。大多数种具有表皮毛，表皮毛有非腺毛和头状腺毛的区别。柿属植物的叶表皮微形态特征类型多样，能够为部分类群的分类提供较好的形态学证据。

Abstract:

In order to understand the leaf epidermal morphology of Diospyros (Ebenaceae), the leaf epidermal characters of 46 species and 2 varieties were observed under light microscopes, and then the major characters were analyzed by principal component analysis. The results showed that the micro-morphology of the leaf in Diospyros could be divided into two groups, Group A and Gruop B. The epidermal cells were irregular with repand or sinuous anticlinal walls in Group A, and which were polygonal with straight or arched anticlinal walls in Group B. The leaves of the genus were hypostomatic. The stomata were mainly anomocytic and sometimes actinocytic, cyclocytic or staurocytic. The trichomes were found in most species, which were either simple non-glandular or capitate glandular. Therefore, the epidermal characters would provide valuable morphological evidences for classification in some taxa of the genus.