文献类型： 外文期刊
作者： Meng, Lin 1 ; Mao, Peichun 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Res & Dev Ctr Grass & Environm, Beijing 100097, Peoples R China
关键词： Elytrigia Desv.;Micromorphology;Anatomy;SEM
期刊名称：BANGLADESH JOURNAL OF PLANT TAXONOMY （ 影响因子：0.679； 五年影响因子：0.664 ）
ISSN： 1028-2092
年卷期： 2013 年 20 卷 2 期
页码：
收录情况： SCI
摘要： The micromorphological and anatomical characters of Elytrigia caespitosa (K. Koch) Nevski, E. intermedia (Host) Nevski x E. elongata (Host) Nevski, E. interrnedia (Host) Nevski and E. repens (L.) Desv; ex Nevski have been studied using Scanning Electron Microscope (SEM) to determine interspecific variation. The results show that the root transverse section consists of epidermis, cortex and stele. Two rings of vascular bundles and a central pith cavity appear in stem morphology. The leaves of E. caespitosa have either single or twin, horseshoe-shaped short cells born along the costal zone of the upper epidermis, which lack prickle hairs and contain spherical or oblique-shaped papillae. In E. intermedia, the parallel subsidiary cells are distributed on the upper epidermis, and there are no short cells in the leaves. Dome-shaped subsidiary cells appear on the upper epidermis of E. internzedia x E. elongate and E. repens, but E. intermedia x E. elongate showes spot-shaped papillae, and its bulliform cells sank into the "hinge cells". E. repens has no papillae, and its bulliform cells are not sunken into the mesophyll. Therefore, the differences in micromorphological characters on the upper epidermis of the leaf could be useful in classifying and determining phylogenetic relationships among the species.
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