基于数字化标本和种群形态变异特征试论块茎堇菜的分类地位

doi:10.7525/j.issn.1673-5102.2018.02.004

植物研究 ›› 2018, Vol. 38 ›› Issue (2): 189-194.doi: 10.7525/j.issn.1673-5102.2018.02.004

基于数字化标本和种群形态变异特征试论块茎堇菜的分类地位

苏雪¹, 侯云云^1,2, 高婷¹, 王亚莉¹, 孙坤¹

1. 西北师范大学生命科学学院, 兰州 730070;
2. 富平中学, 渭南 711700

收稿日期:2017-08-30 出版日期:2018-03-15 发布日期:2018-03-23
通讯作者: 孙坤 E-mail:kunsun@nwnu.edu.cn
作者简介:苏雪(1974-),女,副教授,硕士,主要从事植物繁殖生态学的研究。
基金资助:
国家自然科学基金项目（31260054）

Taxonomic Position of Viola tuberifera Based on Morphological Variation of the Populations and Digital Specimen

SU Xue¹, HOU Yun-Yun^1,2, GAO Ting¹, WANG Ya-Li¹, SUN Kun¹

1. College of Life Science, Northwest Normal University, Lanzhou 730070;
2. Fuping High School, Weinan 711700

Received:2017-08-30 Online:2018-03-15 Published:2018-03-23
Supported by:
The National Natural Science Foundation of China(31260054)

摘要/Abstract

摘要： 块茎堇菜是青藏高原及其邻近地区的一种特有两型闭花植物，目前其分类地位存在诸多争议。据此，本文对块茎堇菜及其近缘类群鳞茎堇菜的主要数字化标本以及同域分布的几个自然种群的叶片形态变异特征进行了分析。结果显示，所有参试数字化标本被分为两个明显不同的集群，一个集群符合块茎堇菜的叶片形态，另一集群则符合鳞茎堇菜；同样，同域分布的6个自然种群也分为两个集群。此外，叶片形态变异分析还显示叶片先端和叶基部形态参数ΔW、AL、BL和LWR在块茎堇菜/鳞茎堇菜同一类群不同种群间或种群内变异幅度较小且较为稳定，然而它们在不同类群间差异却极为显著（P<0.01）。因此，块茎堇菜和鳞茎堇菜理应作为两个不同的类群处理，这也表明叶片形态特征完全可以作为鳞茎堇菜和块茎堇菜的重要分类学依据。

关键词: 块茎堇菜, 数字化标本, 叶片形态, 分类地位

Abstract: Viola tuberifera, which is endemic to the Qinghai-Tibetan Plateau and its adjacent region, is a typical dimorphic cleistogamous plant, and the taxonomical position of V.tuberifera is still controversial. We analyzed the morphological variation of leaves from the digital specimen and three sympatric natural populations of V.bulbosa and V.tuberifera. The PCA analysis of digital specimen indicated that all the samples were divided into two clusters, represented for V.tuberifera and V.bulbosa, respectively. The PCA analysis of sympatric natural populations showed the same results. The parameters reflected the characters of leaf apex and base, such as ΔW, AL, BL and LWR, are relatively lower variation within and among populations of V.tuberifera and V.bulbosa, but the variation of these parameters between V.bulbosa and V.tuberifera is significant(P<0.01). V.tuberifera and V.bulbosa should be treated as different taxon, and indicating the leaf morphological characters can be used in the classificatiopn of V.tuberifera and V.bulbosa.

Key words: Viola tuberifera, digital specimen, leaf morphology, taxonomic position

中图分类号:

Q949.75

苏雪, 侯云云, 高婷, 王亚莉, 孙坤. 基于数字化标本和种群形态变异特征试论块茎堇菜的分类地位[J]. 植物研究, 2018, 38(2): 189-194.

SU Xue, HOU Yun-Yun, GAO Ting, WANG Ya-Li, SUN Kun. Taxonomic Position of Viola tuberifera Based on Morphological Variation of the Populations and Digital Specimen[J]. Bulletin of Botanical Research, 2018, 38(2): 189-194.

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基于数字化标本和种群形态变异特征试论块茎堇菜的分类地位

Taxonomic Position of Viola tuberifera Based on Morphological Variation of the Populations and Digital Specimen

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