| 根据叶表皮微形态特征试论披碱草属（禾本科）中小颖组、宽颖组和长颖组间的系统关系 |
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| 引用本文： | 苏旭,刘玉萍,陈克龙.根据叶表皮微形态特征试论披碱草属（禾本科）中小颖组、宽颖组和长颖组间的系统关系[J].植物研究,2012,32(2):129-136. |
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| 作者姓名： | 苏旭 刘玉萍 陈克龙 |
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| 作者单位： | 1.青海师范大学生命与地理科学学院，西宁 810008；;2.青海师范大学青藏高原环境与资源教育部重点实验室，西宁 810008；;3.青海师范大学思想政治理论课教学科研部，西宁 810008 |
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| 基金项目： | 青海省自然科学基金项目(2011-Z-745);教育部“春晖计划”合作科研项目(Z2010078);青海师范大学科研创新计划项目;青海师范大学博士科研启动经费(202500205);国家自然科学基金项目(30370110)资助 |
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| 摘 要： | 观察了披碱草属中小颖组、宽颖组和长颖组主要代表种的叶表皮形态学特征，总结了3组植物叶表皮结构的异同，探讨了叶表皮特征的分类学意义。同时，根据3组植物叶表皮性状的演化趋势，分析了各组的演化关系和系统位置。结果表明，小颖组最原始，宽颖组较进化，长颖组最高级；小颖组可能直接派生了较进化的宽颖组，并在宽颖组的基础上进而产生了最高级的长颖组。小颖组、宽颖组和长颖组的这一系统关系与利用外部形态特征所获得的演化趋势基本一致。
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| 关 键 词： | 小颖组 宽颖组 长颖组 叶表皮 系统关系 |
Biosystematic Relationships among Sect.Elymus,Sect.Turczaninovia and Sect.Macrolepis in Elymus(Poaceae) Based on the Micromorphological Characteristics of Leaf Epidermis |
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| SU Xu,LIU Yu-Ping,CHEN Ke-Long.Biosystematic Relationships among Sect.Elymus,Sect.Turczaninovia and Sect.Macrolepis in Elymus(Poaceae) Based on the Micromorphological Characteristics of Leaf Epidermis[J].Bulletin of Botanical Research,2012,32(2):129-136. |
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| Authors: | SU Xu LIU Yu-Ping CHEN Ke-Long |
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| Institution: | 1(1.College of Geography and Life Science,Qinghai Normal University,Xining 810008;2.Key Laboratory of Education Ministry on Environments and Resources in Tibetan Plateau,Qinghai Normal University,Xining 810008;3.Department of Ideological and Political Theory Teaching and Research,Qinghai Normal University,Xining 810008) |
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| Abstract: | The leaf epidermises of the major species of sect.Elymus, sect.Turczaninovia and sect.Macrolepis in Elymus were examined, their similarities and differences on the leaf epidermis were summarized, and the taxonomic significance of leaf epidermal features among them was discussed as well. Furthermore, according to the evolutionary trends of leaf epidermal characteristics of three sects, their evolutionary positions and relationships were inferred. The results show that the sect. Elymus is the most primitive one among these three sects, the sect.Turczaninovia is slightly more advanced than the former, and the sect.Macrolepis is the most advanced of them; the sect.Elymus might produce immediately the sect.Turczaninovia, whereas the sect.Macrolepis might derive immediately form the sect.Turczaninovia. The biosystmatic relationships of these three sects are corroborated by the evolutionary trend of external morphology. |
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| Keywords: | sect Elymus sect Turczaninovia sect Macrolepis leaf epidermis biosystematic relationship |
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