根据外部形态特征试论披碱草属3组植物间的系统关系

doi:10.7525/j.issn.1673-5102.2013.02.003

植物研究 ›› 2013, Vol. 33 ›› Issue (2): 139-144.doi: 10.7525/j.issn.1673-5102.2013.02.003

根据外部形态特征试论披碱草属3组植物间的系统关系

苏旭^1,2；刘玉萍³；杨淳彬¹；柯君¹；拉本¹

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

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2013-03-20 发布日期:2013-03-20
基金资助:

Biosystematic Relationships among Three Sects’ Plants in Elymus(Poaceae) Based on the External Morphological Characteristics

SU Xu;LIU Yu-Ping;YANG Chun-Bin;KE Jun;LA Ben

1.School 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

Received:1900-01-01 Revised:1900-01-01 Online:2013-03-20 Published:2013-03-20
Supported by:

摘要/Abstract

摘要： 通过对披碱草属中小颖组、宽颖组和长颖组种类外部形态的观察，总结了3组植物外部形态特征的异同，探讨了形态学特征的分类学意义。同时，根据3组植物外部形态性状—花序、小穗、小花、以及内稃的演化趋势，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。此外，本文对披碱草属参试种的系统关系也作了一定程度的探讨，结果显示圆锥披碱草最原始，墨西哥披碱草最进化，其余参试种居于两者之间。上述研究工作为整个披碱草属系统与进化方面的探讨提供了形态学方面的理论证据。

关键词: 小颖组, 宽颖组, 长颖组, 外部形态特征, 系统关系

Abstract: The external morphology of the major species of sects. Elymus, Turczaninovia and Macrolepis in Elymus was analyzed, the similarities and the differences of the external morphological characteristics were summarized, and the taxonomic significance of external morphological features among them was discussed. Furthermore, according to the evolutionary trends of external morphological characters including inflorescences, spikelets, florets and paleas of three sects, their evolutionary positions and relationships were analyzed. The results show that the sect. Elymus is most primitive among three sects, the sect. Turczaninovia is advanced than the sect. Elymus, and the sect. Macrolepis is the most advanced sect. The sect. Elymus probably generated the sect. Turczaninovia, whereas the sect. Macrolepis was probably derived from the sect. Turczaninovia. The biosystematic relationships of tested species in Elymus were also discussed. The research provides the theoretic foundation for further studying the systematics and evolution of Elymus.

Key words: sect.Elymus, sect.Turczaninovia, sect.Macrolepis, external morphological characteristics, biosystematic relationship

中图分类号:

Q944.56

苏旭;刘玉萍;杨淳彬;柯君;拉本. 根据外部形态特征试论披碱草属3组植物间的系统关系[J]. 植物研究, 2013, 33(2): 139-144.

SU Xu;LIU Yu-Ping;YANG Chun-Bin;KE Jun;LA Ben. Biosystematic Relationships among Three Sects’ Plants in Elymus(Poaceae) Based on the External Morphological Characteristics[J]. Bulletin of Botanical Research, 2013, 33(2): 139-144.

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根据外部形态特征试论披碱草属3组植物间的系统关系

Biosystematic Relationships among Three Sects’ Plants in Elymus(Poaceae) Based on the External Morphological Characteristics

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