寄主植物受益于食肉动物对食草动物的非捕食作用

IF 4.3 1区 农林科学 Q1 ENTOMOLOGY
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引用次数: 0

摘要

摘要食植性捕食者可通过植食引起植物防御反应。由于食虫Orius sauteri会在植物组织中产卵,我们假设它的产卵行为也会诱导植物防御反应,从而对随后的食草动物攻击产生负面影响。在番茄植株上预先接种 O. sauteri 雌虫可显著降低西洋法兰克里尼尔虫的适应性和繁殖能力,在室内微环境中,西洋法兰克里尼尔虫也更喜欢未接种的植株。在田间,O. sauteri 的预接种也会导致 F. occidentalis 的种群增长减少。与雌性 O. sauteri 预接种相比,雄性 O. sauteri 预接种的上述趋势都较弱。接着,转录组分析表明,与未处理的植物相比,接种雌性 O. sauteri 的植物中 MAPK 信号通路、植物激素信号转导和植物与病原体相互作用的防御相关通路显著富集。我们发现,JA 通路中的三个关键基因:氧化烯合成酶(AOS)、茉莉酸 ZIM-domain2(JAZ2)和蛋白酶抑制剂 1(PI-1)都上调了。这是植物防御激活的证据,也是 O. sauteri 预接种(通过取食和产卵活动)在实验室中降低 F. occidentalis 适应性和在温室实验中将种群密度降低近三倍的可能机制。这种机制可在虫害综合防治战略中加以推广,方法是及早引入食虫性生物控制剂,激活作物植物的防御能力,以加强生物虫害控制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Host plants benefit from non-predatory effects of zoophytophagous predators against herbivores

Abstract

Zoophytophagous predators can induce plant defence responses through phytophagous feeding. Since the zoophytophagous bug Orius sauteri lays eggs into plant tissues, we hypothesised that its oviposition behaviour may also induce plant defence responses with a negative impact on subsequent herbivore attacks. Pre-inoculation of O. sauteri females on tomato plants significantly reduced the fitness and reproduction of Frankliniella occidentalis, which also preferred the non-inoculated plants in indoor micro-environments. In the field, O. sauteri pre-inoculation also caused reduced population growth of F. occidentalis. All these tendencies were weaker with male compared to female O. sauteri pre-inoculation. Next, a transcriptome analysis showed that the MAPK signalling pathway, the plant hormone signal transduction and plant-pathogen interaction of defence-related pathways were significantly enriched in plants inoculated with O. sauteri females compared to untreated plants. We showed that three key genes of the JA pathway, allene oxide synthase (AOS), jasmonate ZIM-domain 2 (JAZ2), and proteinase inhibitor 1 (PI-1), were upregulated. This is evidence of plant defence activation, the likely mechanism by which O. sauteri pre-inoculation (through feeding and oviposition activities) reduced F. occidentalis fitness in the laboratory and population densities by almost three times in a greenhouse experiment. This mechanism could be promoted in IPM strategies through the early introduction of zoophytophagous biocontrol agents activating crop plant defences to enhance biological pest control.

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来源期刊
Journal of Pest Science
Journal of Pest Science 生物-昆虫学
CiteScore
10.40
自引率
8.30%
发文量
114
审稿时长
6-12 weeks
期刊介绍: Journal of Pest Science publishes high-quality papers on all aspects of pest science in agriculture, horticulture (including viticulture), forestry, urban pests, and stored products research, including health and safety issues. Journal of Pest Science reports on advances in control of pests and animal vectors of diseases, the biology, ethology and ecology of pests and their antagonists, and the use of other beneficial organisms in pest control. The journal covers all noxious or damaging groups of animals, including arthropods, nematodes, molluscs, and vertebrates. Journal of Pest Science devotes special attention to emerging and innovative pest control strategies, including the side effects of such approaches on non-target organisms, for example natural enemies and pollinators, and the implementation of these strategies in integrated pest management. Journal of Pest Science also publishes papers on the management of agro- and forest ecosystems where this is relevant to pest control. Papers on important methodological developments relevant for pest control will be considered as well.
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