目的 哥纳香属植物是重要的抗癌药物资源,研究叶的结构有利于正确识别该属植物。方法 利用离析法和石蜡切片法研究金平哥纳香、大花哥纳香和云南哥纳香3种植物的叶表皮和结构。结果 3种植物叶的形态结构非常相似,但仍存在着许多差别。金平哥纳香叶的表皮细胞内不含晶体,叶肉组织中含许多纤维状石细胞;而大花哥纳香和云南哥纳香叶的表皮细胞内含晶体,叶肉组织中不含纤维状石细胞。大花哥纳香的单列表皮毛通常为3个细胞,且其叶远轴面不具败育气孔器,每毫米叶宽含7个油细胞和25个粘液细胞,主脉中的维管束组织由10个小的维管束构成,而云南哥纳香的单列表皮毛为2个细胞,叶远轴面具许多败育气孔器,每毫米叶宽含4个油细胞和16个粘液细胞,主脉中的维管组织由12个小的维管束构成。结论 利用叶的表皮特征和内部结构可以鉴别上述3种植物。

Object To study the botanic characteristics of leaves from three plants of Goniothalamus (Bl.)Hook.f.et Thoms.in order to correctly distinguish them from numerous plants of the genus, which are important resource of antic an cermedicine.Methods The maceration method and paraffin method were used to study the epidermis and structures of leaves from G.griffithii Hook.f.et Thoms., G.leiocarpus(W.T.Wang)P.T.Liand G.yunnanensis W.T.Wang.Results Three leaves were morphologically similar in the structure,but there were some anatomical differen ces among them. For example, the absence of druses in the epidermis and the presence of fibrousscler eidsin the laminamesophyll of leaves from G. griffithii,while the presence of drusesinepidermis and the absence offibrous sclereids in laminamesophyll of the leaves from G. griffithii and G. yunnanensis were observed. In addition, epidermalhairs of G.griffithii were composed of three cells, stomatas were always normal,there were seven oil cells and 25 mucilage cellspermmleafwid thin laminamesophyll and the v asculartissue of the midrib consisting of tensmall bundles. However,epidermal hairs of G.yunn anensis were composed of twocells, many abortive stomat as were present at the distal surface,there were only four oilcells and 16 mucilage cellsper mmleafwidth and the vascular tissue of the midribconsisted of 12 sm all bundles.Conclusion Three species were easilyidentified on the basis of epidermal and structural characters of the leaves of them.