Plant Systematics and Evolution

, Volume 302, Issue 1, pp 129–135 | Cite as

Phylogeny of Sparganium (Typhaceae) revisited: non-monophyletic nature of S. emersum sensu lato and resurrection of S. acaule

  • Yu Ito
  • Norio Tanaka
  • Changkyun Kim
  • Robert B. Kaul
  • Dirk C. Albach
Short Communication

Abstract

The diploid aquatic genus Sparganium (Typhaceae) comprises ca. 14 species mainly in cool temperate regions of the world. Among these, S. emersum comprises two infraspecific taxa, subspecies acaule from eastern North America and subspecies emersum from Eurasia and western North America (and occasionally from eastern North America as well). However, there has been some discussion regarding the monophyly of S. emersum sensu lato. We tested the hypothesis of a polyphyletic S. emersum sensu lato in a phylogenetic framework. Sequence data from six plastid DNA regions and nuclear phyC were analyzed using maximum parsimony, maximum likelihood, and Bayesian inference. We obtained a moderately resolved phylogeny with the plastid DNA data set, while phylogenetically less-informative phyC was useful to distinguish morphological species and discern hybrid and non-hybrid specimens. Sparganiumemersum sensu lato was resolved as polyphyletic, clustering with S. angustifolium and S. glomeratum, respectively. Sparganiumacaule is resurrected to be a sister to S. glomeratum, for which synapomorphic and distinguishing morphological characters are provided. Three cases of hybridization were detected.

Keywords

Aquatic plants Hybridization Molecular phylogeny phyC Plastid DNA Sparganium Typhaceae 

Supplementary material

606_2015_1245_MOESM1_ESM.docx (51 kb)
Supplementary material 1 (DOCX 50 kb)

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Copyright information

© Springer-Verlag Wien 2015

Authors and Affiliations

  • Yu Ito
    • 1
    • 2
  • Norio Tanaka
    • 3
  • Changkyun Kim
    • 4
  • Robert B. Kaul
    • 5
  • Dirk C. Albach
    • 6
  1. 1.Botanical Gardens, Graduate School of ScienceThe University of TokyoTokyoJapan
  2. 2.Xishuangbanna Tropical Botanical GardenThe Chinese Academy of SciencesKunmingPeople’s Republic of China
  3. 3.Tsukuba Botanical GardenNational Museum of Nature and ScienceTsukubaJapan
  4. 4.Department of Life ScienceGachon UniversitySeongnamRepublic of Korea
  5. 5.The Bessey HerbariumUniversity of NebraskaLincolnUSA
  6. 6.Institute of Biology and Environmental Sciences (IBU)Carl von Ossietzky-Universität OldenburgOldenburgGermany

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