八种当归属植物叶表皮微形态学研究

Micromorphologic Characteristics of Leaf Epidermis of 8 Species of Angelica L.

在光学显微镜下对8种当归属植物叶表皮微形态进行了观察.结果表明:该属8种植物叶片上表皮细胞形态具有较强的一致性,大多数种类为垂周壁平直的多边形;下表皮细胞的形态、气孔器的排列方式、表皮毛的有无及类型等性状表现出较高的多态性,对当归属种间鉴定具有一定参考价值.依照各物种表皮细胞的形态特征的相似程度,可分为三种类型:同形型、相似型和异形型,但这些特征还不足以为系统学研究提供可靠依据.

The leaf epidermis structures of 8 species in the genus Angelica L.were examined with LM.The results show that they have similar morphological characteristics of leaf epidermis,and the anticlinal walls in most of them are straight.MCLE such as cell shape,arrangement of stomatal apparatus and the distribution of epidermal hairs exhibit a high diversity,which cam be evaluated as the certain references for inter-species identification.They can be divided into three types in accordance with the similar degrees of cells shape in the morphological characteristics on leaf epidermis： isomorphic,similar and different types,but the characteristics of leaf epidermis can not provide adequate references for systematics study.