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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Isoprene Interferes With The Attraction Of Bodyguards By Herbaceous Plants
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Isoprene Interferes With The Attraction Of Bodyguards By Herbaceous Plants

机译：异戊二烯干扰草本植物吸引保镖

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摘要

Isoprene is the most abundant volatile compound emitted by vegetation. It influences air chemistry and is part of plant defense against abiotic stresses. However, whether isoprene influences biotic interactions between plants and other organisms has not been investigated to date. Here we show a new effect of isoprene, namely its influence on interactions between plants and insects. Herbivory induces the release of plant volatiles that attract the herbivore's enemies, such as parasitic wasps, as a kind of bodyguard. We used transgenic isoprene-emitting Arabidopsis plants in behavioral, chemical, and electrophysiological studies to investigate the effects of isoprene on ecological interactions in 2 tritro-phic systems. We demonstrate that isoprene is perceived by the chemoreceptors of the parasitic wasp Diadegma semiclausum and interferes with the attraction of this parasitic wasp to volatiles from herbivore-infested plants. We verified this repellent effect on D. semiclausum female wasps by adding external isoprene to the volatile blend of wild-type plants. In contrast, the antennae of the parasitic wasp Cotesia rubecula do not perceive isoprene and the behavior of this wasp was not altered by isoprene emission. In addition, the performance of the 2 examined lepidopteran herbivores (Pieris rapae and Plutella xylostella) was not affected by isoprene emission. Therefore, attraction of parasitic wasps to host-infested herbaceous plants in the neighborhood of high isoprene emitters, such as poplar or willow, may be hampered by the isoprene emission that repels plant bodyguards.
机译：异戊二烯是植被释放的最丰富的挥发性化合物。它会影响空气化学反应，是植物抵御非生物胁迫的一部分。然而，迄今为止，尚未研究异戊二烯是否影响植物与其他生物之间的生物相互作用。在这里，我们显示了异戊二烯的新作用，即其对植物与昆虫之间相互作用的影响。草食动物会诱使植物挥发物释放，从而吸引草食动物的敌人（例如寄生蜂）作为保镖。我们在行为，化学和电生理研究中使用了发射异戊二烯的转基因拟南芥植物，以研究异戊二烯对2种营养体系中生态相互作用的影响。我们证明异戊二烯被寄生黄蜂Diadegma semiclausum的化学感受器感知到，并干扰了此寄生黄蜂对食草动物侵染植物的挥发物的吸引力。我们通过将外部异戊二烯添加到野生型植物的挥发性混合物中，验证了这种对驱蚊半夏念珠菌的驱避作用。相比之下，寄生黄蜂Cotesia rubecula的触角不能感知异戊二烯，并且该异蜂的行为不会因异戊二烯的发射而改变。此外，检查的2种鳞翅类食草动物（菜豆（Pieris rapae）和小菜蛾（Plutella xylostella））的性能不受异戊二烯排放的影响。因此，驱除植物保镖的异戊二烯发射可能会阻止寄生蜂对高异戊二烯发射器（如杨树或柳树）附近寄主为害的草本植物的吸引。

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