Joint study on the mechanism of recognition in corals

我们发现珊瑚Pocillopora Damicoris幼虫群体之间的接触反应发生了变化。一些最初融合的配对后来表现出不相容的融合，然后不融合。在组织不亲和对的交界处观察到许多空泡和浓缩的核，这表明细胞通过凋亡而死亡。不同科的珊瑚并不总是通过肠外消化竞争。虽然腔肠消化的存在表明这两种珊瑚属于不同的物种，但腔肠消化的缺失并不意味着两种珊瑚在系统发育上是亲缘的。同属珊瑚的卵黄蛋白相似，而不同科珊瑚的卵黄蛋白有显著差异。叶状珊瑚和压缩珊瑚的异常生长(肿瘤)表现出与正常息肉不同的骨骼形态和生殖产量下降。然而，用来自肿瘤和正常息肉的配子从杂交中获得的用柯西西林处理的囊胚的压榨显示了相似数量的染色体。

We showed that contact reaction between young colonies of the coral Pocillopora damicornis changes. Someinitially fused pairs later showedincompatible fusion and then nonfusion. Many vacuoles and condensed nucleiwere observed at the interface of histoincompatible pairs suggesting that celldeath through apoptosis occurred.Corals belonging to different families did not always compete through extracoelenteric digestion. Though presence of coelenteric digestion indicates that the two corals belong to different species, absenc of coelenteric digestiondoes not mean the two corals are phylogenetically related.Yolk protein of five scieractinian corals were analyzed biochemically and immunologicaIIy. Yolk proteins of congeneric corals were similar to each otherwhile those from corals belonging to different families differ significantly.Abnormal growths (tumors) in Porites lobata and P.compressa showed skeletaimorphology different from normal polyp and reduced reproductive output. However, squashes of coichicine-treated blastulae obtained from crosses using gametes from tumors and mormal polyps revealed similarnumber of chromosomes.