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Journal of Integrative Agriculture  2026, Vol. 25 Issue (9): 3527-3536    DOI: 10.1016/j.jia.2025.12.047
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Functional roles of aphid-associated microbes in multitrophic interactions

Jiahui Liu1, 2, Lallie Glacet2, Yong Liu3, Julian Chen4, Guangwei Ren1#, Pengjun Xu1#, Frederic Francis2

1 Key Laboratory of Tobacco Pest Monitoring Controlling & Integrated Management, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China

2 Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Gembloux 5030, Belgium

3 College of Plant ProtectionShandong Agricultural UniversityTaian271018China

4 State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China

 Highlights 

Aphid endosymbionts regulate host nutrition, fitness and resistance to biotic and abiotic stresses.

Microbes in aphid saliva and honeydew mediate plant defenses.

Honeydew-associated microbial volatiles can modify the behaviour of natural enemies.

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摘要  

蚜虫是全球农业生产中的重要害虫。尽管越来越多的研究表明,蚜虫相关微生物在害虫综合治理中具有潜在应用价值,但其在多营养级互作中的功能仍有待深入认识。本文系统综述了蚜虫共生菌及蚜虫分泌物相关微生物的研究进展,重点阐述其对蚜虫生理与行为特性,以及蚜虫与寄主植物和天敌之间相互作用的调控作用。首先,总结了共生菌在改善蚜虫营养状况、增强耐热性,以及提高其对病原物、寄生蜂和杀虫剂抗性等方面的功能多样性。其次,探讨了蚜虫唾液和蜜露中的微生物如何作为分子信号,诱导植物防御反应,并调控捕食性和寄生性天敌的行为。特别关注了蜜露相关微生物中的挥发性有机物在调控捕食者和寄生蜂行为中的作用。最后,讨论了基于共生菌和微生物挥发物的新型生物防治策略,并展望了将微生物生态学融入蚜虫可持续治理体系的未来研究方向。



Abstract  

Aphids (Hemiptera: Aphididae) are economically important pests of crops worldwide.  Although increasing evidence suggests that aphid-associated microorganisms have potential applications in integrated pest management (IPM), our understanding of their roles in multitrophic interactions remains limited.  This review synthesizes current knowledge on aphid-associated endosymbionts and secretion-associated microbes, focusing on their influence on aphid physiology, behavior but also on interactions with host plants and natural enemies.  Firstly, the functional diversity of endosymbionts, which contribute to improved nutrition, heat tolerance and resistance to pathogens, parasitoids and pesticides was highlighted.  Secondly, we examined how microbes from aphid saliva and honeydew can act as molecular cues to induce plant defenses and modify the behaviour of aphidophagous beneficials.  Special attention was given to honeydew-associated microbial volatiles (mVOCs), which can modulate the behavior of predators and parasitoids.  Finally, emerging biocontrol strategies that leverage symbionts and mVOCs were discussed to propose future directions for integrating microbial ecology into sustainable aphid management.

Keywords:  aphid endosymbionts       secretion-associated microbes        plant defense        microbial volatiles        multitrophic interactions  
Received: 01 August 2025   Accepted: 03 December 2025 Online: 26 December 2025  
Fund: 

This work was supported by the China Postdoctoral Science Foundation (2025M783836), the Qingdao Postdoctoral Research Project, China (QDBSH20250102110), the Major Special Projects for Green Pest Control, China (110202201017(LS-01)) and the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences (ASTIP-TRIC04). 

About author:  Jiahui Liu, E-mail: liujiahui_aphid@163.com; #Correspondence Guangwei Ren, E-mail: renguangwei@caas.cn; Pengjun Xu, E-mail: xupengjun@caas.cn

Cite this article: 

Jiahui Liu, Lallie Glacet, Yong Liu, Julian Chen, Guangwei Ren, Pengjun Xu, Frederic Francis. 2026. Functional roles of aphid-associated microbes in multitrophic interactions. Journal of Integrative Agriculture, 25(9): 3527-3536.

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