Predator-induced trophic shift of a free-living ciliate: parasitism of mosquito larvae by their prey.
Predator-induced trophic shift of a free-living ciliate: parasitism of mosquito larvae by their prey.
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捕食者引起的自由生活纤毛虫的营养转移：蚊子幼虫被猎物寄生。
DOI：
10.1126/science.3131877
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Anderson,JR
中科院分区：
文献类型：
--
作者：
Washburn,JO;Gross,ME;Mercer,DR;Anderson,JR
树洞蚊子，锡勒伊蚊，的幼虫释放一种水传播因子，诱导它们的猎物之一，四膜虫纤毛虫克拉基兰博恩菌的形态发生。诱导L的自由生活的营养体。克拉基会经历同步反应，细胞分裂并转化为寄生细胞（寄生细胞），并在幼虫捕食者身上形成包囊。寄生纤毛虫穿透角质层，进入血腔，最终杀死它们的捕食者宿主。在自然界中，这种营养转变可能导致捕食者灭绝和微生物种群的巨大变化。这种多态性纤毛虫的兼性寄生可能是作为一种反捕食策略而进化的。 L 的实验诱导寄生响应。克拉基为研究纤毛原生动物的细胞形态发生提供了一种新模型。
Larvae of the treehole mosquito,Aedes sierrensis, release a waterborne factor that induces morphogenesis of one of their prey, the tetrahymenid ciliateLambornella clarki. Induced free-living trophonts ofL. clarkiundergo a synchronous response in which cells divide and transform into parasitic cells (theronts) that encyst on larval predators. Parasitic ciliates penetrate the cuticle, enter the hemocoel, and ultimately kill their predator-host. In nature, this trophic shift can lead to predator extinction and dramatic changes in microbial populations. Facultative parasitism by this polymorphic ciliate may have evolved as an antipredator strategy. The experimentally inducible parasitic response ofL. clarkiprovides a novel model for studying cellular morphogenesis of ciliated protozoa.