黄连营养器官解剖结构与其阴生环境相关性研究

Study on the Anatomical Structure of Vegetative Organs of Coptis chinensis and Its Pertinence to Sciophyte Conditions

通过石蜡切片法制片,光学显微镜观察,研究了黄连叶、根的形态解剖结构.结果表明:黄连叶为等面叶,表皮由1层排列紧密的表皮细胞构成,细胞外壁角质膜较薄,气孔只分布于下表皮;叶肉没有栅栏组织和海绵组织的分化,叶脉不发达;根中导管数量少,孔径小,次生木质部不含射线.上述特征表明黄连为典型的阴地植物.

The anatomical structures of leaves and roots of Coptis chinensis were studied by the method of paraffin microtomy and optical microscopic observation . Results show that the leaves belong to isolateral leaves, each epidermis consists of a row of irregular epidermic cells which are arranged closely, and the horny layers of the epidermic cells are thin. Stomata only exist in lower epidermis. Palisade tissue can＇t be found in the mesophyll. Moreover the leaves don＇t have well-developed veins. There are no many vessels whose bore diameter is small in the root, and no ray in the xylem. So Coptis chinensis is a typical kind of sciophyte.