• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1996 Fiscal Year Final Research Report Summary

The function of the echinoderm madreporite.

Research Project

Project/Area Number 07640909
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 動物生理・代謝
Research InstitutionINTERNATIONAL CHRISTIAN UNIVERSITY

Principal Investigator

TAKAHASHI Keiichi  International Christian University, Department of Biology, Professor, 教養学部, 教授 (40011481)

Project Period (FY) 1995 – 1996
KeywordsEchinodermata / Water-vascular system / Madreporite / Cilia
Research Abstract

The function of the echinoderm madreporite was studied with a focus on the mechanism of the bidirectional transport by the ciliated epithelium of the pore canal and the possible sorting mechanism. DIC microscopy of the movement of microbeads injected near the openings of pore tubes isolated from the madreporite by collagenase treatment revealed that the beads larger than 0.5 mum in diameter were always transported oralwards whereas the smaller beads (<0.2mum) often moved in the opposite direction, indicating selection by size. Bidirectional transport was also observed on the flat surface of ciliated epithelium obtained by cutting open an isolated pore tube. This showed that the bidirectionality did not arise from the tubular geometry of the tissue but an inherent characteristic of the cilia. Observation of the movement of individual cilia indicated, however, that their beat form was similar to that of typical cilia.

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] Tamori,M.: "Structure and function of the pore canals of the sea urchin madreporite." Philosophical Transactions of the Royal Society,B.351・1340. 659-676 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tamori, M., Matsuno, A.and Takahashi, K.: "Structure and function of the sea urchin madreporite" Proc.Roy.Soc.B,351 (1340). 659-676 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1999-03-09  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi