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Host plants benefit from non-predatory effects of zoophytophagous predators against herbivores

文献类型： 外文期刊

作者： Zhu, Zhengyang 1 ; Jaworski, Coline C. 1 ; Gao, Yulin 5 ; Xu, Zhigang 3 ; Liu, Junxiu 1 ; Zhao, Ercheng 1 ; Wang, Su 1 ; Desneux, Nicolas 4 ; Di, Ning 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Protect, Beijing 100097, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Nat Enemies Insects, Beijing 100122, Peoples R China

3.Nanjing Agr Univ, Coll Agr, Nanjing 210095, Peoples R China

4.Univ Cote Azur, INRAE, UMR ISA, F-06000 Nice, France

5.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

关键词： Defence responses; Fitness; Feeding; Oviposition behaviour; Biological control

期刊名称：JOURNAL OF PEST SCIENCE （ 影响因子：4.8； 五年影响因子：5.0 ）

ISSN： 1612-4758

年卷期： 2024 年

页码：

收录情况： SCI

摘要： 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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