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Journal of Plant Research

, Volume 112, Issue 4, pp 397–404 | Cite as

Phylogeny of Osmundaceae Inferred from rbcL Nucleotide Sequences and Comparison to the Fossil Evidences

  • Yoko Yatabe
  • Harufumi Nishida
  • Noriaki Murakami

rbcL

sequences of 11 of 15 extant species of Osmundaceae which represent all three genera, Osmunda, Todea and Leptopteris. Our phylogenetic analysis concluded: 1) Osmunda subg. Osmunda and subg. Plenasium are monophyletic groups, but subg. Osmundastrum is not. The genus Osmunda is not monophyletic because Todea and Leptopteris are positioned within Osmunda. 2) Osmunda cinnamomea is the most basally positioned species in Osmundaceae, and it can be called as “a living fossil” because a fossil species (O. claytoniites) with almost the same morphology as this species was recorded from the Triassic. 3) Osmunda japonica and O. regalis are very closely related with only one nucleotide difference in the rbcL gene. 4) Greater nucleotide variation (5–7 nucleotides) was found between conspecific samples of O. cinnamomea and O. claytoniana collected from Japan and United States. Each of these two species may comprise more than two biologically differentiated species.

Keywords: Osmundaceae, rbcL, Living fossil, Molecular phytogeny 

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Copyright information

© The Botanical Society of Japan 1999

Authors and Affiliations

  • Yoko Yatabe
    • 1
  • Harufumi Nishida
    • 2
  • Noriaki Murakami
    • 1
  1. 1.Department of Botany, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwake-cho, Kyoto, 606–8502 JapanJP
  2. 2.Laboratory of Biosphere Sciences, Faculty of Science and Technology, Chuo University, Kasuga, Tokyo, 112–8551 JapanJP

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