Studies on species-and self-recognition in scleractinian corals

石珊瑚的物种和自我识别研究

• 批准号: 07836011
• 负责人: HIDAKA Michio
• 金额: $ 1.47万
• 依托单位: University of the Ryukyus
• 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-07836011/
• 关键词: CORAL; HISTORECOGNITION; CHIMERA; HISTOCOMPATIBILITY; APOPTOSIS; COLONY; MESENTERIAL FILAMENTS; NEMATOCYST

Developmental changes in histocompatibility reactions and the cellular mechanism of transformation from incompatible fusion to nonfusion in the coral Pocillopora damicornis were studied.When primary polyps or young colonies derived from different colonies of a coral, P.damicornis were brought into contact within a few days after settlement, they showed either fusion or incompatible fusion. When branches isolated from adult colonies were brought into contact they showed either fusion or nonfusion. The present results suggest that the coral do not have functional histocompatibility system to avoid tissue fusion at an early stage of development.Pairs that show incompatible fusion transformed into nonfusion or disconnection after several months. Large extracellular spaces and cells with condensed nuclei and small amount of cytoplasm were observed at the interface of incompatibly fused pairs. This suggests that cells at the interface died through apoptosis and were phagocitized during the transformation from incompatible fusion to nonfusion.Sensitivity of nematocyst discharge response and that of extracoelenteric digestion response were compared using various coral species. In some combination pf coral species, corals did not discharge nematocysts against target corals, while they display aggressive behavior using mesenterial filaments. This suggests the possibility that coral use different markers to distinguish allogeneic from xenogeneic corals.

本文研究了珊瑚Pocillopora damicornis组织相容性反应的发育变化和从不相容融合到不相容融合的细胞机制，当珊瑚Pocillopora damicornis的不同群体的初生息肉或幼群体在定居后的几天内接触时，它们表现出融合或不相容融合。当从成年菌落分离的分支接触时，它们显示融合或不融合。目前的研究结果表明，珊瑚没有功能性的组织相容性系统，以避免组织融合在早期阶段的发展。对不兼容的融合转化为nonfusion或断开几个月后。在不相容的融合对的界面处观察到大的细胞外间隙和具有浓缩的核和少量细胞质的细胞。这表明，在界面处的细胞死亡，通过凋亡和吞噬过程中不兼容的融合nonfusion.Sensitivity的放电反应和肠外消化反应的敏感性进行了比较，使用不同的珊瑚品种。在某些组合的珊瑚物种，珊瑚并没有排放包囊对目标珊瑚，而他们表现出侵略性的行为，利用肠系膜细丝。这表明珊瑚可能使用不同的标记来区分同种异体珊瑚和异种珊瑚。

项目成果

Hidaka M,K Yurugi, S Sunagawa, RA Klnzie III: "Contact reactions between young colonies of the coral Pocillopora damicornis" Coral Reefs. 16. 13-20 (1997)

Hidaka M,K Yurugi, S Sunakawa, RA Klnzie III：“珊瑚 Pocillopora damicornis 年轻群体之间的接触反应”珊瑚礁。

Hidaka M and M Yogi: "Incompatible fusion between young colonies of the coral Pocillopora damicornis : ultrastructure of the interface region." Zool Sci.13 (Supplement). 131 (1996)

Hidaka M 和 M Yogi：“珊瑚 Pocillopora damicornis 的年轻群体之间的不相容融合：界面区域的超微结构。”

Hidaka M.,K.Yurugi,S.Sunagawa,R.A.Kinzie III: "Contact reaction between young colonies of the coral Pocillopora damicornis." Coral Reefs. 15(印刷中). (1996)

Hidaka M.、K. Yurugi、S. Sunakawa、R. A. Kinzie III：“珊瑚礁珊瑚幼虫群之间的接触反应”15（出版中）。

Hidaka.M.,K.Yurugi,S.Sunagawa,R.A.KinzieIII: "Contact reactions between young colonies of the coral pocillopora damicornis." Coral Reefs. 16(印刷中). (1997)

Hidaka.M.、K.Yurugi、S.Sunakawa、R.A.KinzieIII：“珊瑚小珊瑚群之间的接触反应”16（出版中）。

Hidaka M.,K,Yurugi, S.Sunagawa, R.A.Kinzie III: "Contact reactions between young colonies of the coral Pocillopora damicornis." Coral Reefs. 16. 13-20 (1997)

Hidaka M.,K,Yurugi, S.Sunakawa, R.A.Kinzie III：“珊瑚 Pocillopora damicornis 的年轻群体之间的接触反应。”