冬青属植物的叶表皮特征及其分类学意义  

Epidermal anatomy of the genus Ilex and its taxonomic significance

作　　者：李相传[1] 孙柏年[1] 林志成[1] 丁素婷[1] 肖良[2] 吴靖宇[1] 

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]长安大学地球科学与资源学院,西安710054

出　　处：《兰州大学学报（自然科学版）》2010年第4期13-21,29,共10页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(40772012);兰州大学2008年接受国内博士生访学项目;2007年国家建设高水平大学公派研究生项目

摘　　要：利用光学显微镜对102种冬青属植物的叶表皮特征进行了观察.结果表明:不同种冬青属植物的叶表皮特征既具有一定的相似性(如气孔器下生),据大小可分为正常气孔器和大气孔器,气孔器类型以双环列型为主,其次为环列型、三环列型和辐射型,下表皮具有退化大气孔器、簇状木质化细胞和瘿状结构;也具有一定的差异性,如叶表皮细胞的大小、形状、垂周壁形态和表面纹饰以及表皮毛的有无和长度.冬青属叶表皮特征的共同点表明冬青属是一自然类群,而其不同点说明叶表皮的某些特征可以作为种间分类的依据.因此,冬青属的叶表皮特征具有分类学意义,能为该属现生植物的系统分类、化石植物鉴定和系统演化研究提供可靠的证据.Foliar cuticles of 102 species of Ilex were examined under a light microscope. The results show that cuticle features are uniform to some extent at an inter-specific level： leaves being hypostomatic with normal and giant stomata, the stomatal type primarily comprising amphicyclocytic, secondly cyclocytic, tricyclic and actinocytic, abaxial epidermis with regressive/aberrant giant stomata, lignified cells and wart-like structures. But some cuticular variability exists at an inter-specific level in terms of cell size, shape, anticlines, surface ornamentations and trichomes. Therefore, the common cuticular features indicate that the genus Ilex is a natural taxon, while the minor variations in its epidermal anatomy provide additional evidence for the inter-specific differentiation. It is concluded that the epidermal anatomy of Ilex is of considerable taxonomic significance, having great potential to improve the classical taxonomy, paleobotany and phylogenetics.

关 键 词：冬青属 叶表皮 气孔器 UI指数 古植物学 

分 类 号：Q914[天文地球—古生物学与地层学] Q944[生物学—古生物学]