The function of the echinoderm madreporite.

棘皮动物 Madreporite 的功能。

• 批准号: 07640909
• 负责人: TAKAHASHI Keiichi
• 金额: $ 1.41万
• 依托单位: INTERNATIONAL CHRISTIAN UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640909/
• 关键词: Echinodermata; Water-vascular system; Madreporite; Cilia; 棘皮動物学; 繊毛運動

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.

研究了棘皮动物 Madreporite 的功能，重点是孔管纤毛上皮的双向运输机制和可能的分选机制。通过胶原酶处理从 Madreporite 中分离出的孔管开口附近注射的微珠的运动 DIC 显微镜显示，直径大于 0.5 微米的珠子总是向口腔输送，而较小的珠子 (<0.2 微米) 经常向相反方向移动，表示按尺寸选择。在通过切开隔离孔管获得的纤毛上皮的平坦表面上也观察到双向运输。这表明双向性不是由组织的管状几何形状引起的，而是由纤毛的固有特征引起的。然而，对单个纤毛运动的观察表明，它们的跳动形式与典型纤毛的跳动形式相似。

项目成果

Tamori, M., Matsuno, A.and Takahashi, K.: "Structure and function of the sea urchin madreporite" Proc.Roy.Soc.B,351 (1340). 659-676 (1996)

Tamori, M.、Matsuno, A. 和 Takahashi, K.：“海胆 madreporite 的结构和功能”Proc.Roy.Soc.B,351 (1340)。

Tamori, M.: "Structure and function of the pore canals of the sea urchin madreporite." Philosophical Transactions of the Royal Society, B.(印刷中). (1996)

Tamori, M.：“海胆 Madreporite 的孔道的结构和功能。”英国皇家学会哲学汇刊，B.（出版中）。

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)

Tamori, M.：“海胆 Madreporite 的孔道的结构和功能。”英国皇家学会哲学汇刊，B.351・1340（1996）。

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

Tamori, M.：“海胆 Madreporite 的孔道的结构和功能。”Ryoyal 学会哲学汇刊，B.351・1340 (1996)。