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植物研究 ›› 2015, Vol. 35 ›› Issue (3): 321-326.doi: 10.7525/j.issn.1673-5102.2015.03.001

• 论文 •    下一篇

基于形态和叶表皮微形态特征试论西藏固沙草的归并

苏旭1,2;刘玉萍3;李兆孟1,2;周勇辉1,2;陈克龙4;陈文俐5*   

  1. 1.青海师范大学生命与地理科学学院青海省自然地理与环境过程重点实验室,西宁 810008;
    2.青海大学青海省高原作物种质资源创新与利用国家重点实验室,西宁 810016;
    3.青海师范大学思想政治理论课教学科研部,西宁 810008;
    4.青海师范大学科学技术处,西宁 810008;
    5.中国科学院植物研究所系统与进化植物学国家重点实验室,北京 100093
  • 出版日期:2015-05-20 发布日期:2015-06-24
  • 基金资助:
     

Reduction on Orinus tibeticus Based on the External Morphology and Micromorphological Characteristics of Leaf Epidermis

SU Xu1,2;LIU Yu-Ping3;LI Zhao-Meng1,2;ZHOU Yong-Hui1,2;CHEN Ke-Long4;CHEN Wen-Li5*   

  1. 1.Key Laboratory of Physical Geography and Environmental Process in Qinghai Province,College of Geography and Life Science,Qinghai Normal University,Xining 810008;
    2.Key Laboratory of Plateau Crop Germplasm Innovation and Utilization of Qinghai Province,Qinghai University,Xining 810016;
    3.Department of Ideological and Political Theory Teaching and Research,Qinghai Normal University,Xining 810008;
    4.Science and Technology Department,Qinghai Normal University,Xining 810008;
    5.State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093
  • Online:2015-05-20 Published:2015-06-24
  • Supported by:
     

摘要: 通过形态学性状的观测、统计和叶表皮微形态特征的分析,比较了西藏固沙草、固沙草和鸡爪草3个近缘物种的主要性状差异,以探讨西藏固沙草的系统分类归属。结果显示,在外部形态上西藏固沙草与固沙草差异甚小,难以进行区分,但与鸡爪草差异明显,是典型的种间关系;在叶表皮微形态解剖上,西藏固沙草的绝大多数特征与固沙草的一致或类同,可与鸡爪草却存在明显间断。故研究认为,西藏固沙草与固沙草是同一个种,西藏固沙草应作为固沙草的异名。

关键词: 禾本科, 固沙草属, 西藏固沙草, 形态性状, 叶表皮微形态

Abstract: We analyzed the main character differences among nearest related Orinus tibeticus, O.thoroldii and O.anomala in the genus Orinus by morphological observation and anatomical analysis of leaf epidermises. There was very slight disparity between O.tibeticus and O.thoroldii in external morphology, and classifying two species was difficult. The differences between O.tibeticus and O.anomala were distinct, and two taxa were two different species. Anatomically, the most features of O.tibeticus were consistent with or similar to that of O.thoroldii, while for O.anomala, the discontinuity of characters between them was obviously present. Therefore, O.tibeticus and O.thoroldii should belong to the same species, and O.tibeticus can be reduced to synonymy of O.thoroldii.

Key words: Poaceae, Orinus, Orinus tibeticus, morphological character, morphology of leaf epidermis

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