Trauer-Kizilelma Ute, Hilker Monika
Institute of Biology, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Haderslebener Str. 9, Berlin 12163, Germany.
Institute of Biology, Dahlem Centre of Plant Sciences, Freie Universität Berlin, Haderslebener Str. 9, Berlin 12163, Germany.
Dev Comp Immunol. 2015 Jul;51(1):126-33. doi: 10.1016/j.dci.2015.03.004. Epub 2015 Mar 16.
Insects are known to prime the immune state of their offspring. However, although the beginning of insect life, the egg stage, is often greatly endangered by parasitism, no knowledge is available regarding whether transgenerational immune priming improves the immune responses of insect eggs to actual parasitoid attacks. Our study revealed suppression of the development of parasitoids in transgenerationally immune-primed Manduca sexta eggs and reduced emergence rates of parasitoids from these eggs. The higher defence efficiency of immune-primed M. sexta eggs against parasitoids was in agreement with the increased antibacterial activity and phenoloxidase activity of these eggs in response to parasitism compared to the eggs of control parents. Our study showed that immunochallenged insect parents could enable their offspring already in the egg stage to defend more efficiently against parasitic invaders. We discuss whether M. sexta benefits from transgenerational immune priming of eggs by limiting the population growth of egg parasitoids.
已知昆虫会启动其后代的免疫状态。然而，尽管昆虫生命的起始阶段，即卵期，常常受到寄生现象的严重威胁，但关于代际免疫启动是否能改善昆虫卵对实际寄生蜂攻击的免疫反应，目前尚无相关知识。我们的研究揭示，在经代际免疫启动的烟草天蛾卵中，寄生蜂的发育受到抑制，且从这些卵中羽化出的寄生蜂的羽化率降低。与对照亲本的卵相比，经免疫启动的烟草天蛾卵对寄生蜂具有更高的防御效率，这与这些卵在受到寄生时抗菌活性和酚氧化酶活性的增加相一致。我们的研究表明，受到免疫挑战的昆虫亲本能够使其处于卵期的后代更有效地抵御寄生入侵者。我们讨论了烟草天蛾是否通过限制卵寄生蜂的种群增长而从卵的代际免疫启动中获益。
