木兰科拟单性木兰属叶部微形态的研究  

A STUDY ON LEAF MICROMORPHOLOGY OF PARAKMERIA IN MAGNOLIACEAE

作　　者：周守标[1,2] 陈士超[1,2] 樊汝汶[1,2] 朱政德[1,2] 

机构地区：[1]安徽师范大学生物系 [2]南京林业大学

出　　处：《安徽师大学报》1997年第1期39-43,共5页

摘　　要：在扫描电镜下，对我国木兰科（Ｍａｇｎｏｌｉａｃｅａｅ）特有属拟单性木兰属（Ｐａｒａｋｍｅｒｉａ）５种１变种植物的叶表皮和云南拟单性木兰（Ｐ．ｙｕｎｎａｎｅｎｓｉｓＨｕ）乐东拟单性木兰［Ｐ．ｌｏｔｕｎｇｅｎｓｉｓ（ＣｈｕｎｅｔＣ．Ｈ．Ｔｓｏｎｇ）Ｌａｗ］２种叶片的横切面进行了观察．结果表明：该属叶部微形态在种间较为相似，因此是亲缘关系极为密切的自然类群；气孔器在下表皮分布的密度和下表皮外表面蜡质纹饰种间存在一定的差异；乐东拟单性木兰和云南拟单性木兰叶横切面中脉及表皮细胞也存差异．The leaf epidermal surface of 5 species, 1 variety and leaf anatomical structure of 2 species are observed under scanning electron microscope (SEM). Results are as follows: The leaf micromorphology of Parakmeria Hu et Cheng is very similar between different species, they belong to a natural group with close relationship. The density, types and wax ornamentation of stomatal apparatus on the lower epidermis are different between different species. The leaf comparative anatomical structure of P.lotungensis and P.yunnanensis are different because of different epidermis. The epidermis of P.lotungensis is composed of sclerenchyma cells. The leaf micromorphology feature of Parakmeria provides new experimental evidences for systematic evolution and species delimitation in the Magnoliaceae.

关 键 词：拟单性木兰属 叶片 微形态 木兰科 

分 类 号：Q949.747.1[生物学—植物学]