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Bulletin of Botanical Research ›› 2018, Vol. 38 ›› Issue (2): 189-194.doi: 10.7525/j.issn.1673-5102.2018.02.004

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

SU Xue1, HOU Yun-Yun1,2, GAO Ting1, WANG Ya-Li1, SUN Kun1   

  1. 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)

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

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