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Aboral localization of responsiveness to a metamorphic neuropeptide in the planula larva of Acropora tenuis

  • MATSUSHIMA Kanae
    Graduate School of Humanities and Sciences, and Tateyama Marine Laboratory, Marine and Coastal Research Center, Ochanomizu University
  • KIYOMOTO Masato
    Graduate School of Humanities and Sciences, and Tateyama Marine Laboratory, Marine and Coastal Research Center, Ochanomizu University
  • HATTA Masayuki
    Graduate School of Humanities and Sciences, and Tateyama Marine Laboratory, Marine and Coastal Research Center, Ochanomizu University

Abstract

Planula larvae of the coral genus Acropora ini-tiate metamorphosis in response to microorganisms on the undersea substrate. Since planulae move forward in the direction of the aboral side, it is supposed that initial metamorphic signaling localizes on this side of planula. We dissected planulae of Acropora tenuis into fragments perpendicularly to the oral-aboral axis, and tested their response to a metamorphosis-inducing neuropeptide. Aboral 1/3 fragments metamorphosed in response to the neu-ropeptide with high efficiency while most oral 2/3 frag-ments did not. The results suggest that the tissue in the aboral 1/3 region receives the metamorphic neuropeptide and releases downstream signals to complete metamor-phosis of the oral side in A. tenuis larvae. In addition, oral fragments gained a metamorphic ability in several days, revealing regeneration of the aboral tissue.

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Details

  • CRID
    1390282680278451968
  • NII Article ID
    130002144874
  • DOI
    10.3755/galaxea.12.77
  • ISSN
    18833969
    18830838
  • Text Lang
    en
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles

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