Journal of Plant Research

, Volume 107, Issue 3, pp 221–227 | Cite as

Allozyme diversity and the evolution ofSymplocos (Symplocaceae) on the Bonin (Ogasawara) Islands

  • Akiko Soejima
  • Hidetoshi Nagamasu
  • Motomi Ito
  • Mikio Ono
Original Articles


To study the origin and speciation of plants in oceanic islands, electrophoretic analyses have been done on three endemic species ofSymplocos in the Bonin Islands as well as on three other species;S. kuroki, S. nakaharae andS. tanakae which are considered to be closely related to the Bonin endemics. There occur three species:S. kawakamii, S. pergracilis andS. boninensis in Bonin. The genusSymplocos is one which is considered to be diversified in the Bonin Islands.

Seven enzyme systems presumed to be encoded by 18 loci were examined. The genetic diversity was low in the island species, as reported in some oceanic island plants of Hawaii and the Bonin Islands. The three endemics share high genetic identities and they clustered together in the tree drawn by the UPGMA method, suggesting that they are a monophyletic group, that is, they result from a single introduction.

Key words

Allozyme Bonin Islands Oceanic islands Symplocos 


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Copyright information

© The Botanical Society of Japan 1994

Authors and Affiliations

  • Akiko Soejima
    • 1
  • Hidetoshi Nagamasu
    • 2
  • Motomi Ito
    • 3
  • Mikio Ono
    • 4
  1. 1.Department of Life Sciences, College of Integrated Arts and SciencesUniversity of Osaka PrefectureSakai, OsakaJapan
  2. 2.Department of Environment Sciences, Faculty of Integrated Human StudiesKyoto UniversityKyotoJapan
  3. 3.Department of Biology, Faculty of ScienceChiba UniversityChibaJapan
  4. 4.Makino Herbarium, Faculty of ScienceTokyo Metropolitan UniversityHachioji, TokyoJapan

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