骨碎补科植物叶表皮特征及其系统学意义  

Structural Characteristics of Leaf Epidermis and Their Systematic Significance in Davalliaceae

作　　者：马晓东[1,3] 何春梅[2] 王发国[1] 王爱华[1,3] 邢福武[1] 

机构地区：[1]中国科学院华南植物园,中国科学院植物资源保护与可持续利用重点实验室,广州510650 [2]广东省林业科学研究院,广州510520 [3]中国科学院大学,北京100049

出　　处：《植物科学学报》2015年第4期438-447,共10页Plant Science Journal

基　　金：国家自然科学基金(30800056);中国科学院知识创新工程重要方向性项目(KSCX2-EW-Z-1);中国科学院青年创新促进会基金

摘　　要：基于骨碎补科(Davalliaceae)植物属的界定和属下等级的划分一直存在较大争议,本研究首次对骨碎补科6属39种(秦仁昌系统)植物的叶表皮进行了扫描电镜观察。结果显示,骨碎补科有9种类型的角质层,其中,阴石蕨属(Humata)的角质层有密集的孔状凹陷结构;Wibelia条纹突起较厚,排列整齐且细密紧致;广义钻毛蕨属(Davallodes)内存在多种角质层类型,需要在属下进一步细分。本研究还根据角质层特征讨论了骨碎补科与一些近缘种类的关系。角质层特征是骨碎补科内种属分类的重要依据,而保卫细胞形状和气孔密度,均不能用来界定骨碎补科的属和种。本研究按角质层分类的结果与Kato和Tsutsumi的分子系统学分类观点一致。Because the classification in Davalliaceae is significantly controversial,we observed for the first time the leaf epidermis of 39 species representing six genera of Davalliaceae in the classification system of Ching RC using scanning electron microscopy（ SEM）. Results showed that Davalliaceae had nine types of cuticular layer. Humata had dense pinhole structures;Wibelia had thick projections in stripes,which were orderly arranged,fine and compact;Davallodes had many types of cuticular layers,and required further subdivision under the genus. Our research also examined the relationship among many relative species on the basis of cuticular layer characteristics, which could be used among and below genera for classification in Davalliaceae. However,both the shape of guard cells and stomatal density could not be used for classification of genera and species in Davalliaceae. Our classification is consistent with that of molecular systematics by Kato Tsutsumi.

关 键 词：骨碎补科 叶表皮 角质层特征 系统学意义 

分 类 号：Q944[生物学—植物学] Q949.36