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

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概要

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• Planula larvae of the coral genus <I>Acropora</I> 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 <I>Acropora tenuis</I> 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 <I>A. tenuis</I> larvae. In addition, oral fragments gained a metamorphic ability in several days, revealing regeneration of the aboral tissue.

著者

• MATSUSHIMA Kanae

  Graduate School of Humanities and Sciences, and Teteyama 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

• KIYOMOTO Masato

  Graduate School of Humanities and Sciences, and Tateyama Marine Laboratory, Marine and Coastal Research Center, Ochanomizu University

関連論文

• An unidentified species of acoel flatworm in the genus Waminoa associated with the coral Acropora from the field in Japan
• A hanging life of acroporids in success after COT outbreaks
• Presumed natural hybrids between Acropora donei and Acropora tenuis
• Aboral localization of responsiveness to a metamorphic neuropeptide in the planula larva of Acropora tenuis
• Molecular evidence supporting predation by emerging snails on hermatypic corals in temperate areas of Japan

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