稀有植物香果树叶解剖结构的研究

Study on Anatomical Structure of Leaves of Rare Plant Emmenopterys henryi Oliv.

通过石蜡切片法制片,光学显微镜观察,Motic显微摄像,研究了香果树（Emmenopterys henryi Oliv.）的叶形态解剖结构.结果表明,香果树叶为典型异面叶;表皮由一层紧密的形状不规则的表皮细胞组成,细胞外壁角质膜较薄;气孔类型为平列型,仅分布于下表皮;下表皮上零星分布着多细胞表皮毛;叶肉组织发达,栅栏组织由1～2层排列整齐的圆柱形细胞构成;海绵组织枝状分布,排列极为疏松,细胞间隙大;叶脉主脉发达;上述特征反映出植物结构与环境的统一性.

The anatomical structure of＇leaves of Emmenopterys henryi Oliv. was investigated by waxslides and photo-microscopy. The observed results indicate that the leaf belongs to typical bifacial leaf. Each epidermis consists of a row of irregular epidermic cells which are arranged closely and the horny layers of the cells are thin. The stomata only exist in lower epidermis covered by sparse cellulous epidermal hairs, and their type is paracytic. The mesophyll is very rich. Its palisade tissue is composed of 1 - 2 layers of cylindrical cells. The ratio of the palisade tissue to the spongy parenchyma is 1：2.2. The midrib is conspicuous. The characters mentioned above shows that it is adapted to the environments in which they live.