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首页> 外文期刊>Marine ecology progress series >Genetic relationship and maturity state of the allorecognition system affect contact reactions in juvenile Seriatopora corals
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Genetic relationship and maturity state of the allorecognition system affect contact reactions in juvenile Seriatopora corals

机译：同种异体认知系统的遗传关系和成熟状态会影响幼年Seriatopora珊瑚的接触反应

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Adult stony corals are characterized by a well-developed allorecognition system. In most cases, genetically identical coral grafts fuse, whereas genetically different grafts (allografts and xenografts) show various histoincompatible responses. Very little is known, however, about the allorecognition system in juvenile corals. We studied contact reactions of juvenile pairs in 2 sclerac-tinian coral species: Seriatopora caliendrum and S. hystrix (0 to 59 d after settlement). Juvenile colonies were experimentally grafted in combination groups of various genetic distances: sibling allografts of S. hystrix (4 pairs), non sibling allografts of S. caliendrum (12 pairs), non sibling allografts of S. hystrix (16 pairs) and xenografts of the 2 species (26 pairs). Three tissue contact reactions were detected in all of the genetic combination groups: nonfusion, fusion and incompatible fusion. The transition in contact reaction patterns was recorded over a 1 yr period. Contact reactions and their duration were largely consistent among pair replicates of each combination and within each of the 4 genetic combination groups. We suggest that in juvenile Seriatopora corals, the genetic combination of each graft is a primary determinant of the contact reaction and its endurance. Maturity state of the allorecognition system, affects both onset and duration of the fusion and incompatible fusion reactions in the juvenile corals. Onset of the fusion reaction was observed only when grafted colonies were younger than 4 mo. Throughout the experimental period, most fusion reactions transformed into histoincompatible reactions or disconnection and virtually none of the allografts or xenografts maintained stable chimeras. We suggest that as the alloimmune system matures, incompatible fusion reactions eventually transform into nonfusion or disconnection via tissue necrosis of the contact zone.
机译：成年石质珊瑚的特征是发达的同种异体认知系统。在大多数情况下，基因相同的珊瑚移植物融合在一起，而基因不同的移植物（同种异体移植物和异种移植物）显示出各种组织相容性反应。然而，关于少年珊瑚的同种异体认知系统知之甚少。我们研究了两个硬骨-锡尼珊瑚物种中的幼鱼对的接触反应：Seriatopora caliendrum和S. hystrix（定居后0至59 d）。在不同遗传距离的组合组中通过实验嫁接少年菌落：同胞链霉菌同胞异体移植物（4对），无花链霉菌同胞异体移植物（12对），同胞链霉菌同种异体移植物（16对）和2种（26对）。在所有基因组合组中检测到三种组织接触反应：非融合，融合和不相容融合。在1年的时间内记录了接触反应模式的转变。接触反应及其持续时间在每种组合的配对重复之间以及在4个遗传组合组的每组之间基本一致。我们建议，在未成年的Seriatopora珊瑚中，每个移植物的遗传组合是接触反应及其耐力的主要决定因素。同种异体认知系统的成熟状态，会影响幼珊瑚融合和不相容融合反应的开始和持续时间。仅当移植的菌落小于4mo时才观察到融合反应的开始。在整个实验期间，大多数融合反应转化为组织相容性反应或断开连接，几乎没有同种异体移植物或异种移植物保持稳定的嵌合体。我们建议，随着同种异体免疫系统的成熟，不相容的融合反应最终会通过接触区的组织坏死转变成非融合或断开连接。

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