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Journal of Plant Research

, Volume 111, Issue 4, pp 557–564 | Cite as

Variation in therbcL sequence ofStegnogramma pozoi subsp.mollissima (Thelypteridaceae) in Japan

  • Yoko Yatabe
  • Masayuki Takamiya
  • Noriaki Murakami
Original Articles

Abstract

Stegnogramma pozoi (Lagasca) K. Iwats. subsp.mollissima (Fischer ex Kunze) K. Iwats. is one of the most common ferns in Japan with a very broad geographical distribution and habitat ranges. We examined the intrasubspecific variation of therbcL gene, and found three types in the subspecies (Atami-1, Atami-2, and Tateyama types). The Atami-1 and 2 types shared three apomorphic nucleotides and their geographical distribution is intermingled. Thus, we considered them to have intraspecific variation. In contrast, the Tateyama type had 4–5 different nucleotides than the Atami types, and showed a more northern distribution. Leaf morphology of the Tateyama type is distinct from that of the Atami types, though the leaf shape in Tateyama type varies considerably and in some cases overlaps with other types. Ferns have fewer morphological features that are systematically significant than flowering plants because they lack complex reproductive organ. It is reasonable to expect that species recognition of ferns based only on leaf morphology can be fine tuned by molecular features. Variation in therbcL sequences might be useful as an indication of significant biological units.

Key words

Intraspecific variation Plasticity rbcL Stegnogramma pozoi subsp.mollissima Thelypteridaceae 

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Copyright information

© The Botanical Society of Japan 1998

Authors and Affiliations

  • Yoko Yatabe
    • 1
  • Masayuki Takamiya
    • 2
  • Noriaki Murakami
    • 1
  1. 1.Department of Botany, Graduate School of ScienceKyoto UniversityKyotoJapan
  2. 2.Department of Environmental Science, Faculty of ScienceKumamoto UniversityKumamotoJapan

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