金星蕨科16种植物叶表皮特征的研究

利用光学显微镜对金星蕨科(Thelypteridaceae)8属16种植物的叶表皮形态进行了观察和研究,为金星蕨科植物的系统演化及分类提供科学依据。结果表明:(1)16种金星蕨科植物的叶片表皮细胞为不规则型,表皮细胞垂周壁大多呈深波状。(2)气孔为下生型,多呈椭圆形;共观察到6种气孔器类型(极细胞型、腋下细胞型、聚合极细胞型、聚腋下细胞型、不规则型和聚围绕细胞型),每种植物具2~5种不同类型的气孔器。(3)金星蕨科8属植物在表皮细胞大小、垂周壁形状、气孔大小和形状、气孔密度、气孔指数和气孔器类型上存在一定的属间差异。

Study on the Characteristics of Leaf Epidermis of 16 Species of Thelypteridaceae

The epidermal structures of the sixteen species of Thelypteridaceae were investigated under light microscope(LM).The results indicated that:(1)Their epidermis cells are irregular,with deep sinuate anticlinal walls.(2)All the stomatal apparatuses occur in the lower epidermis,and most of them are elliptical.Altogether 6 types of stomatal apparatus were observed in present investigation(Polocytic type,Axillocytic type,Copolocytic type,Coaxillocytic type,Anomocytic type,Coroundcytic type).And each plant possesses 2-5 different types of stomatal apparatus.(3)The cell size of the leaf epidermis,the form of anticlinal wall,the size and form of stomatal apparatus,stomatal density,stomatal index and type of stomatal apparatus showed some difference between the eight genera of Thelypteridaceae.The results provide evidences for phylogeny and classification of Thelypteridaceae.