Nicotinamide adenine dinucleotide phosphate(NADPH)-cytochrome P450 re-ductase(CPR)is involved in the metabolism of endogenous and exogenous substances,and detoxification of insecticides.RNA interference(RNAi)of CPR in certain insects causes developmental defects and enhanced susceptibility to insecticides.However,the CPR of Acyrthosiphon pisum has not been characterized,and its function is still not under-stood.In this study,we investigated the biochemical functions of A.pisum CPR(ApCPR).ApCPR was found to be transcribed in all developmental stages and was abundant in the embryo stage,and in the gut,head,and abdominal cuticle.After optimizing the dose and silencing duration of RNAi for downregulating ApCPR,we found that ApCPR suppression resulted in a significant decrease in the production of cuticular and internal hydrocarbon contents,and of cuticular waxy coatings.Deficiency in cuticular hydrocarbons(CHCs)decreased the survival rate of A.pisum under desiccation stress and increased its suscepti-bility to contact insecticides.Moreover,desiccation stress induced a significant increase in ApCPR mRNA levels.We further confirmed that ApCPR participates in CHC production.These results indicate that ApCPR modulates CHC production,desiccation tolerance,and insecticide susceptibility in A.pisum,and presents a novel target for pest control.

Jian-Wen Qiao;Yong-Liang Fan;Bing-Jin Wu;Tian-Tian Bai;Ying-Hao Wang;Zhan-Feng Zhang;Dun Wang;Tong-Xian Liu

State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau,Ministry of Agriculture,Northwest A&F University,Yangling,Shaanxi Province,China;Key Lab of Integrated Crop Pest Management of Shandong Province,College of Plant Health and Medicine,Qingdao Agricultural University,Qingdao,Shandong Province,China

中国昆虫科学（英文版）

[1]Jian-Wen Qiao;Yong-Liang Fan;Bing-Jin Wu;Tian-Tian Bai;Ying-Hao Wang;Zhan-Feng Zhang;Dun Wang;Tong-Xian Liu-.Downregulation of NADPH-cytochrome P450 reductase via RNA interference increases the susceptibility of Acyrthosiphon pisum to desiccation and insecticides)[J].中国昆虫科学（英文版）,2022(04):1105-1119

ductase,ApCPR,CHCs

Downregulation,NADPH,cytochrome,P450,reductase,via,interference,increases,susceptibility,Acyrthosiphon,pisum,desiccation,insecticides,Nicotinamide,adenine,dinucleotide,phosphate,involved,metabolism,endogenous,exogenous,substances,detoxification,RNAi,certain,insects,causes,developmental,defects,enhanced,However,has,not,been,characterized,its,still,under,stood,In,this,study,investigated,biochemical,functions,was,found,transcribed,all,stages,abundant,embryo,gut,head,abdominal,cuticle,After,optimizing,dose,silencing,duration,downregulating,that,suppression,resulted,significant,production,cuticular,internal,contents,waxy,coatings,Deficiency,hydrocarbons,decreased,survival,rate,stress,increased,contact,Moreover,induced,levels,We,further,confirmed,participates,These,results,indicate,modulates,tolerance,presents,novel,target,pest,control

0.500954