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Jasmonate-inducible plant defences cause increased parasitism of herbivores

机译:茉莉酸酯诱导的植物防御导致草食动物寄生性增加

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摘要

In many plants, defence systems against herbivores are induced through the octadecanoid pathway, which may also be involved in recruiting natural enemies of herbivores. This pathway can be induced by treating plants with jasmonic acid or by natural herbivory, and increases resistance against herbivorous insects in tomato plants, in part by causing production of toxic and antinutritive proteinase inhibitors and oxidative enzymes. Herbivore-infested tomato plants release increased amounts of volatiles and attract natural enemies of the herbivores, as do other plants. The octadecanoid pathway may regulate production of these volatiles, which attract host-seeking parasitic wasps. However, plant resistance compounds can adversely affect parasitoids as well as herbivores. It is unclear whether the combination of increased retention and/or attractiveness of parasitic wasps to induced plants and the adverse effects of plant defence compounds on both caterpillars and parasitoids results in a net increase in parasitization of herbivores feeding on induced plants. Here I show that inducing plants with jasmonic acid increases parasitism of caterpillar pests in an agricultural field twofold. Thus, elicitors of plant resistance may become useful in agriculture.
机译:在许多植物中,通过食十八烷途径诱导了对食草动物的防御系统,该途径也可能参与招募食草动物的天敌。该途径可以通过用茉莉酸处理植物或天然草食动物来诱导,并部分地通过引起有毒和抗营养的蛋白酶抑制剂和氧化酶的产生而增加对番茄植物中食草昆虫的抗性。与其他植物一样,被食草动物感染的番茄植物释放出更多的挥发物,并吸引食草动物的天敌。十八烷通路可能调节这些挥发物的产生,从而吸引寻求宿主的寄生黄蜂。但是,植物抗性化合物会对寄生虫和食草动物产生不利影响。尚不清楚寄生蜂对诱导植物的保留和/或吸引力增加,以及植物防御化合物对毛毛虫和拟寄生虫的不利影响的组合,是否会导致以诱导植物为食的草食动物的寄生虫性净增加。在这里,我证明了用茉莉酸诱导植物可增加农业领域中毛虫害虫的寄生率。因此,植物抗性的引发剂可能在农业中变得有用。

著录项

  • 来源
    《Nature》 |1999年第6737期|p.686-688|共3页
  • 作者

    Jennifer S. Thaler;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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