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The biosynthesis of alarm pheromone in the wheat aphid Rhopalosiphum padi is regulated by hormones via fatty acid metabolism

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Journal of Integrative Agriculture 2024年第7期23卷 2346-2361页

作者： Chengxian Sun Yaoguo Qin Julian Chen Zhengxi Li Department of Entomology/Ministry of Agriculture Key Laboratory for Monitoring and Environment-friendly Control of Crop Pests College of Plant ProtectionChina Agricultural UniversityBeijing 100193China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China

Aphids are major insect pests in agriculture and forestry *** attacks by natural enemies,many aphids release an alarm pheromone to protect their *** most aphids,the main component of the aphid alarm pheromone(AAP)is the sesquiterpene hydrocarbon(E)-β-farnesene(EβF).However,the mechanisms behind its biosynthesis and regulation remain poorly *** this study,we used the bird cherry–oat aphid Rhopalosiphum padi,which is an important wheat aphid,to investigate the regulatory mechanisms of EβF *** results showed that EβF biosynthesis occurs during the mature embryo period and the molting period of the 1st-and 2nd-instar *** provide the prerequisite material for EβF production and *** on transcriptome sequencing,RNAi analysis,hormone treatments,and quantitative measurements,we found that the biosynthesis of EβF utilizes acetyl coenzyme A produced from fatty acid degradation,which can be suppressed by juvenile hormone but it is promoted by 20-hydroxyecdysone through the modulation of fatty acid *** is the first systemic study on the modulation of EβF production in *** results of our study provide insights into the molecular regulatory mechanisms of AAP biosynthesis,as well as valuable information for designing potential aphid control strategies.

关键词： (E)-β-farnesene critical period for biosynthesis fatty acid metabolism juvenile hormone 20-hydroxyecdysone

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