Self and non self recognition in a marine sponge, Halichondria okadai

研究了海洋海绵Halichondria okadai的自我和非我识别功能。一只成虫在接触时表现出对海鞘幼虫的排斥。冈田的个体也认识到大多数同种异体是非我的。此外，就在浮游幼虫从母体蜕变为幼体后，它们在兄弟姐妹中表现出异种识别的能力，即两个幼体在接触区域相互融合或被排斥。在日本血吸虫中，对日本血吸虫个体的异种排斥方式与对同种排斥不同，对成年个体的异种排斥方式也不同于对幼虫的异种排斥方式。然后，为了讨论同种异体识别的遗传控制，我们检查了自然种群和培养的兄弟姐妹之间的融合和排斥的频率。

The function of self and nonself recognition in a marine sponge Halichondria okadai was studied. An adult individual showed rejection against the individual of Halichondria japonica, when they came in contact with each other. The individual of H. okadai also recognized most of allogeneic ones as nonself. Furthermore, just after the metamorphosis of planktonic larvae from a mother individual into young individuals, they showed the ability of allorecognition among their siblings, that is, two young individuals fused with each other or rejected at their contact area. In H. okadai, the manner of xenorejection against individuals of H. japonica was different from that of allorejection, and the manner of allorejection of adult individuals was also different from the manner shown by young individuals. Then, to discuss the genetic control of allorecognition in H. okadai, we have examined the frequency of fusion and rejection among natural populations and among cultured siblings.