A COMPLEX ALLORECOGNITION SYSTEM IN A REEF-BUILDING CORAL - DELAYED-RESPONSES, REVERSALS AND NONTRANSITIVE HIERARCHIES
A COMPLEX ALLORECOGNITION SYSTEM IN A REEF-BUILDING CORAL - DELAYED-RESPONSES, REVERSALS AND NONTRANSITIVE HIERARCHIES
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DOI：
10.1007/bf00426436
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发表时间：
1994-01-01
期刊：
影响因子：
3.5
通讯作者：
RINKEVICH, B
中科院分区：
文献类型：
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作者：
CHADWICKFURMAN, N;RINKEVICH, B
通过对11个种群(181个测定)的分枝组合进行24个月的分析，在野外发现了一个高度多态和复杂的同种异体识别系统。菌落间组合的重复结果在时间尺度和反应类型上都是一致的。不同的同种异体组合表现出两种主要结果之一，要么是单侧排斥反应，要么是在“非融合”状态下的一系列其他不相容的反应。这些反应与颜色变体(紫色为主，黄色为主)部分相关。另有22例同种异体移植物完全融合。首次接触后1~7个月发生单侧排斥反应。不融合通常在3~9个月后发展为骨缝屏障，6~23个月时形成单侧集落特异性过度生长，18~22个月时出现部分逆转。在这个过程中，小的病变通常出现在从属伴侣的组织上，要么被主要伴侣过度生长，要么愈合。两年后，群体间的过度生长网络被建立起来，基本上具有层次性，但也发生了一些非传递性的相互作用。菌落被分成三个不同的组织相容性组；在每个组内，菌落进行不融合。在群体之间，群体以群体特有的方式表现出不融合或相互排斥。基于这些结果，我们讨论了硬珊瑚融合与排斥现象所使用的术语，柱头目中自我非我识别的可能遗传背景，以及与使用短期同种识别分析相关的方法论人工制品。
A highly polymorphic and complex allorecognition system in the coral Stylophora pistillata was revealed in the field by assaying branch pair combinations among 11 colonies (181 assays) for 24 months. Replicates of between-colony combinations exhibited consistent outcomes, in both time scale and type of response. Different allogeneic combinations exhibited one of two main outcomes, either unilateral rejection, or an array of other incompatible reactions following a state of ''non-fusion''. These responses were partially linked with color morphs (purple dominated yellow). An additional 22 isogeneic grafts resulted in complete fusion. Unilateral rejection occurred 1-7 months following initial contact. Nonfusion usually developed into skeletal suture barriers after 3-9 months, and then into unilateral colony-specific overgrowths at 6-23 months with some reversals in direction at 18-22 months. During this process, small lesions usually developed on the tissue of the subordinate partner, which were either overgrown by the dominant partner or healed. After two years, a network of overgrowths among colonies was established with essentially hierarchial properties, but some nontransitive interactions also occurred. The colonies segregated into three distinct histocompatibility groups; within each group, colonies engaged in nonfusion. Between groups, colonies exhibited nonfusion or rejected each other in a group-specific manner. Based on the results, we discuss the terminology used for fusion versus rejection phenomena in scleractinian corals, the possible genetic background for self-nonself recognition in Stylophora, and the methodological artifacts associated with the use of short-term allorecognition assays.