西南地区当归属植物叶表皮微形态研究  

Micro-morphological characters of leaf epidermis in Angelica from Southwest China

作　　者：冯图[1,2] 刘爽[1] 何兴金[1] 

机构地区：[1]四川大学生命科学学院,成都610065 [2]毕节学院环境与生命科学系,毕节551700

出　　处：《四川大学学报（自然科学版）》2009年第6期1798-1804,共7页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(30670146);国家自然科技资源平台资助项目(2005DKA21403)

摘　　要：利用光学显微镜和扫描电镜对中国西南地区12种当归属植物的叶表皮微形态(如气孔器类型、表皮细胞与气孔形状、气孔纹饰及细胞角质膜特征等)进行了观察,测量并统计气孔长度和气孔指数.研究结果表明当归属植物叶表皮微形态特征在种间存在较大的差异,但表皮细胞形状、气孔分布情况、气孔类型和细胞角质膜特征等是本属植物较为稳定的演化特征,可以作为物种分类与鉴别的依据.最后根据叶表皮微形态特征列出了12种当归属植物的分种检索表.The leaf epidermal morphology of 12 species of Angelica in Southwest China were observed under light microscopy (LM) and scanning electron microscopy (SEM).The micro-morphological characters, such as stomata type,shape of cells and stomata,ornamentation of stomata and cuticular membrane, were investigated.The indices and lengths of stomata were measured.The results indicated that the micro-morphological characters were variant among Angelica species,but several characters were species-specific and could be used for distinguishing these species.In conclusion,the leaf micro-morphological characters showed great significance in systematics of Angelica species.In addition,a dichotomous key based on the micro-morphological characters of leaf epidermis was compiled in this paper.

关 键 词：中国西南地区 当归属 植物 叶表皮微形态 形态研究 Southwest China characters species of 气孔指数 scanning electron MICROSCOPY 微形态特征 表皮细胞 light MICROSCOPY 膜特征 significance 光学显微镜 分种检索表 演化特征 扫描电镜 气孔长度 

分 类 号：N55[自然科学总论]