三种丁香叶片的比较解剖学观察

Comparative Anatomy Observation of Leaf Blades of 3 Kinds of Cloves

运用光镜对 3种丁香的叶片进行比较解剖学观察表明 ,贺兰山丁香、华北紫丁香与北京丁香的叶片均为典型双子叶植物背腹型叶。但气孔器类型、叶肉组成和主脉结构三者存在明显差异 ;贺兰山丁香和华北紫丁香气孔器为无规则型 ,而北京丁香则为不等型 ;贺兰山丁香栅栏组织为 1层细胞组成 ,且排列紧密 ,华北紫丁香和北京丁香为 2层细胞且排列疏松 ;贺兰山丁香主脉机械组织由 3～ 5层厚角细胞组成 ,华北紫丁香 8～ 9层 ,北京丁香 1 1～ 1

A comparative anatomy observation was made on leaf blades of 3 kinds of cloves using optical microscope. The results show that the leaf blades of Syringa pinnatifolia Hemsl. var. alashannsis Ma et S. Q. Zhou,S.oblata Lindl.and S.vulgaris L.are all typical back-abdomen type leavesof dicotyledons. But some significant differences exist among the three in the aspects of types of stomatic apparatus mesophyll composition and primary vein structure. The stomatic apparatus of Syringa pinnatifolia Hemsl. var. alashannsis Ma et S. Q. Zhou and S.oblata Lindl.are irregularity type and that of S. vulgaris L. is disparity type. The palisade tissue of Syringa pinnatifolia Hemsl. var. alashannsis Ma et S. Q. zhou consists of one stratum of cells which line up densely and those of S. oblata Lindl. and S. vulgaris L consist of two strata of cells which line up loosely. The primary vein mechanical tissue of Syringa pinnatifolia Hemsl. var. alashannsis Ma et S. Q. Zhou consists of 3 to 5 strata of thick-angle cells and those of S. oblata Lindl.and S. vulgaris L. consist of 8 to 9 strata and 11 to 14 strata of thick-angle cells respectively.