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药用植物苦丁茶与近缘种的微形态研究——叶表皮特征的扫描电镜观察
王玉国; 韦发南;
广西壮族自治区中国科学院广西植物研究所!广西桂林541006
摘要:
在扫描电镜下对药用植物苦丁茶 (Ilex kudingcha C.J.Tseng)与 4个近缘种的叶表皮微形态进行了观察。结果显示这些材料的叶表皮仅远轴面有气孔器存在 ,气孔圆形至椭圆形 ,气孔外拱盖表面多平滑 ,拱盖内缘近平滑 ,浅波状或波状 ,外缘角质膜在气孔周围呈环形包着气孔。但各种间叶表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。本研究结果支持将五棱苦丁茶 (I.pentagona S.K.Chen,Y.X.Feng et C.F.L iang)从苦丁茶中独立出来建立一新种 ,但因苦丁茶具有 2种类型气孔器外缘角质膜排列 ,而不支持对扣树 (I.kaushue S.Y.Hu)与苦丁茶的合并
关键词:  苦丁茶  叶表皮  气孔器  
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