20种药用金丝桃属植物的显微鉴别

目的：为20种药用金丝桃属植物的显微鉴定提供解剖学依据。方法：用整体透明法、石蜡制片法和半薄切片法对20种药用金丝桃属植物不同器官进行形态解剖学研究。结果：金丝桃属植物中存在3种分泌结构：分泌细胞、分泌囊(道)和韧皮部中分泌小管道,其中分泌细胞团含金丝桃素类物质,分泌囊(道)和分泌小管道含油脂类物质。20种植物叶的内部分泌结构的类型、分布密度、大小和位置存在较大差异,同时茎的形态、花萼、花瓣、花药及果实的解剖结构也存在一定差异。结论：该属的内部分泌结构和解剖特征可以作为这20种药用植物的显微鉴别指标。

Morphological identification of 20 medicinal species in Hypericum

Objective:To provide anatomical evidences for the morphological and histological identification of 20 medicinal species in Hypericum.Method: Morphological and anatomical study on the organs of 20 medicinal species in Hypericum using tissue clearing,paraffin sectioning and thin sectioning.Result: According to their anatomical characteristics,the secretory structures can be divided into nodules,secretory cavities(canals) and tiny secretory tubes of 20 medicinal species in Hypericum.Hypericin was produced and stored in the nodules,while the volatile oil was produced and stored in the secretory cavities(canals) and tiny secretory tubes.The types differed markedly from each other in location,diameter and distributional density of leaf,and the anatomical structures differed from each other of stem,calyx,petal,anther and fruit among the 20 species in Hypericum.Conclusion: The secretory structures may be as anatomical evidences for the morphological and histological identification of 20 medicinal species in Hypericum.