叶片毛状体介导的捕食者对芸豆植物体内食草螨分布的影响

IF 1.8 2区 农林科学 Q2 ENTOMOLOGY
Tatsuya Yoshida, Yasuyuki Choh
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引用次数: 0

摘要

有些捕食者喜欢在有微结构(如毛状体和穹隆)的叶片上定居,在叶片上留下痕迹。食草节肢动物则会根据捕食者留下的痕迹选择叶片。捕食者在叶片上留下的痕迹是否会通过植物微观结构影响草食性猎物在植物中的分布,目前仍不清楚。因此,我们通过研究食草螨(Tetranychus urticae)和捕食螨(Phytoseiulus persimilis)的产卵模式,考察了它们在植物中的分布。我们以芸豆植株(Phaseolus vulgaris)的两片展开的主叶和第一片三叶叶为研究对象,以叶片毛状体为微观结构。第一三叶叶片上的毛状体密度高于主叶,叶背面的毛状体密度高于叶正面的毛状体密度。柿树雌成虫在三叶一心叶片上产卵多于主叶片。虽然雌性 T. urticae 成虫更喜欢在主叶背面产卵,但之前植物暴露于捕食者的情况会降低这种偏好。卵分布的改变是对持久性有机污染物痕迹的反应,而不是对持久性有机污染物卵的反应。我们的研究结果表明,T. urticae 在有天敌痕迹的叶片上繁殖,不会改变其产卵偏好。众所周知,天敌痕迹的存在会降低荨麻蝇的繁殖能力,这可能会对芸豆植株上荨麻蝇的下一代种群数量产生重大影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Leaf trichome-mediated predator effects on the distribution of herbivorous mites within a kidney bean plant

Leaf trichome-mediated predator effects on the distribution of herbivorous mites within a kidney bean plant

Some predators prefer to settle on leaf patches with microstructures (e.g., trichomes and domatia), leaving traces on the patches. Herbivorous arthropods, in turn, select leaf patches in response to these traces left by predators. It remains unclear whether traces of predators on leaf patches affect the distribution of herbivorous prey within plants through plant microstructure. Therefore, we examined the distribution of herbivorous mite (Tetranychus urticae) and predatory mite (Phytoseiulus persimilis) by investigating their oviposition pattern. We used a kidney bean plant (Phaseolus vulgaris) with two expanded primary leaves and the first trifoliate leaf, focusing on leaf trichomes as the microstructure. The density of trichomes was higher on the first trifoliate leaf than on the primary leaves and on the abaxial surface of the leaves than on the adaxial surface. Adult female P. persimilis laid more eggs on the first trifoliate leaf to the primary leaves. Although adult female T. urticae preferred to oviposit on the abaxial surface of primary leaves, previous exposure of plants to predators diminished this preference. The altered egg distribution would be a response to the traces of P. persimilis rather than eggs of P. persimilis. Our findings indicate that T. urticae reproduces on leaf patches with traces of predators without altering their oviposition preference. Given that the presence of predator traces is known to reduce the reproduction of T. urticae, it may have a substantial effect on the population of T. urticae in the next generations on kidney bean plants.

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来源期刊
CiteScore
3.90
自引率
9.10%
发文量
81
审稿时长
4-8 weeks
期刊介绍: Experimental and Applied Acarology publishes peer-reviewed original papers describing advances in basic and applied research on mites and ticks. Coverage encompasses all Acari, including those of environmental, agricultural, medical and veterinary importance, and all the ways in which they interact with other organisms (plants, arthropods and other animals). The subject matter draws upon a wide variety of disciplines, including evolutionary biology, ecology, epidemiology, physiology, biochemistry, toxicology, immunology, genetics, molecular biology and pest management sciences.
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