苦丁茶与近缘种的果皮微形态特征及其分类学意义  

MICROMORPHOLOGICAL CHARACTERS OF FRUIT COATS IN ILEX KUDINGCHA C.J.TSENG AND RELATIVE SPECIES AND THEIR TAXONOMIC SIGNIFICANCE

作　　者：王玉国[1] 韦发南[1] 

机构地区：[1]广西壮族自治区中国科学院广西植物研究所,桂林541006

出　　处：《木本植物研究》2001年第1期47-50,T010,T011,共6页

基　　金：广西自然科学基金

摘　　要：在扫描电镜下对药用植物苦丁茶 (IlexkudingchaC .J.Tseng)与 4个近缘种的果皮微形态进行了观察。结果显示这些材料的果皮上均有气孔器存在 ,气孔圆形至椭圆形 ,气孔外拱盖表面近平滑或有蜡质碎片 ,拱盖内缘近平滑稀浅波状 ,外缘角质膜在气孔周围呈环形包着气孔。但各种间果皮的微形态特征具有较为明显的差异 ,有一定的分类鉴定意义。本研究结果表明扣树(I .kaushueS .Y .Hu)的果实有指状毛附属物 ,不支持与苦丁茶的合并。五棱苦丁茶 (I.pen tagonaS .K .Chen ,Y .X .FengetC .F .Liang )的果皮特征与苦丁茶较近 ,但有明显差异 ,支持将其从苦丁茶中独立出来建立一新种。Scanning electron microscope (SEM) was used to examine characters of fruit coats in a medical plant, Ilex kudingcha C. J. Tseng, and its relative 4 species. In those species, stomatal apparatus is ovate or suborbicular or elliptic and only presents on the fruit surface. Ornamentation of outer stomatal ledge (or rim) is nearly smooth or with wax fragments and inner margin of them is nearly smooth, rarely sinuolate. Cuticular membrane is insular but annular around stomata. As a result of observation, characters of fruit coats under SEM are very useful evidence in identifying and classifying of Ilex . In the present paper, it is not supported that I. kudingcha should be referred to I. kaushue S. Y. Hu because of the existence of fingered trichomes on the fruit epidermis in I. kaushue but it is supported that I. pentagona S. K. Chen, Y. X. Feng et C. F. Liang is a new speices because of the remarkable difference of characters of fruit coats between I. pentagona and I. kudingcha .

关 键 词：苦丁茶 果皮 气孔器 冬青科 微形态特征 分类学意义 

分 类 号：Q949.754.6[生物学—植物学] Q944.59