中国秋海棠属植物的叶表皮特征及其分类学意义  

Characters of Leaf Epidermis of Begonia(Begoniaceae) from China and Their Taxonomic Significance

作　　者：张嵘梅[1,2] 陈文红[1] 税玉民[1] 陈少瑜[3] 魏志丹[1,2] 

机构地区：[1]中国科学院昆明植物研究所生物多样性与生物地理学重点实验室,云南昆明650204 [2]中国科学院研究生院,北京100049 [3]云南省林业科学院国家林业局珍稀濒特森林植物保护和繁育重点实验室,云南昆明650204

出　　处：《云南植物研究》2008年第6期665-678,共14页Acta Botanica Yunnanica

基　　金：国家自然科学基金项目(30270109);云南省自然科学基金(2001C22Q)

摘　　要：在光学显微镜下,对中国秋海棠属(Begonia)植物7组52种2变种的叶表皮进行观察。结果表明秋海棠属植物叶表皮形态在属内组间具有较大的相似性,表皮细胞为多边形或近多边形,垂周壁平直或弓形,大多数种类表皮细胞内具有晶体,气孔器仅分布于下表皮,且以不等型为主。叶表皮综合特征,例如表皮细胞形状,表皮毛类型,表皮细胞内晶体的类型和形态,气孔器形态以及与一些种类独有特征的组合,在种间,尤其在近缘种之间具有明显的差异。Leaf epidermis of 52 species and two varieties representing seven sections of Begonia （Begoniaceae） from China were examined under light microscopy. The results showed that leaf epidermal characters of the genus revealed a remarkable consistency： the leaf epidermal cells were usually polygonal and subpolygonal beating with straight or arched anticlinal walls; and the stomatal apparatus was mainly anisocytic type and presented in abaxial epidermis of all studied species. However, the multiple leaf epidermal characters, including the shape of epidermal cells, the pattern of epidermal hairs, the shape of stomatal apparatus, the type of crystals in epidermal cells and some distinct characters varies obviously with species, in particular among species allies.

关 键 词：中国 秋海棠属 叶表皮 分类学意义 

分 类 号：Q944[生物学—植物学] Q949