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学術論文

Adult Influence on Juvenile Phenotypes by Stage-Specific Pheromone Production

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Werner,  MS
Department Integrative Evolutionary Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

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Claaßen,  MH
Department Integrative Evolutionary Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

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Renahan,  T
Department Integrative Evolutionary Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

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Dardiry,  M
Department Integrative Evolutionary Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

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Sommer,  RJ
Department Integrative Evolutionary Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

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引用

Werner, M., Claaßen, M., Renahan, T., Dardiry, M., & Sommer, R. (2018). Adult Influence on Juvenile Phenotypes by Stage-Specific Pheromone Production. iScience, 10, 123-134. doi:10.1016/j.isci.2018.11.027.


引用: https://hdl.handle.net/21.11116/0000-0003-BA28-F
要旨
Many animal and plant species respond to population density by phenotypic plasticity. To investigate if specific age classes and/or cross-generational signaling affect density-dependent plasticity, we developed a dye-based method to differentiate co-existing nematode populations. We applied this method to Pristionchus pacificus, which develops a predatory mouth form to exploit alternative resources and kill competitors in response to high population densities. Remarkably, adult, but not juvenile, crowding induces the predatory morph in other juveniles. High-performance liquid chromatography-mass spectrometry of secreted metabolites combined with genetic mutants traced this result to the production of stage-specific pheromones. In particular, the P. pacificus-specific di-ascaroside#1 that induces the predatory morph is induced in the last juvenile stage and young adults, even though mouth forms are no longer plastic in adults. Cross-generational signaling between adults and juveniles may serve as an indication of rapidly increasing population size, arguing that age classes are an important component of phenotypic plasticity.