title: The effect of silencing arginine kinase by RNAi on the larval development of Helicoverpa armigera.
abstract: Arginine kinase (AK) is an important regulation factor of energy metabolism in invertebrate. An arginine kinase gene, named HaAK, was identified to be differentially expressed between Cry1Ac-susceptible (96S) and Cry1Ac-resistant (Bt-R) Helicoverpa armigera larvae using cDNA-amplification fragment length polymorphism analysis. The full-length open reading frame sequence of HaAK gene with 1068 bp was isolated from H. armigera. Quantitative reverse transcription polymerase chain reaction assay revealed that HaAK gene is specifically expressed in multiple tissues and at larval developmental stages. The peak expression level of HaAK was detected in the midgut of the fifth-instar larvae. Moreover, the expression of HaAK was obviously down-regulated in Bt-R larvae. We further constructed a dsRNA vector directly targeting HaAK and employed RNAi technology to control the larvae. The feeding bioassays showed that minute quantities of dsRNA could greatly increase the larval mortality and delay the larval pupation. Silencing of HaAK significantly retarded the larval development, indicating that HaAK is a potential target for RNA interference-based pest management.
authors.affiliation: Biotechnology Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081,China.
authors.forename: X-L
authors.initials: XL
authors.lastname: Qi
authors.affiliation: Biotechnology Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081,China.
authors.forename: X-F
authors.initials: XF
authors.lastname: Su
authors.affiliation: Biotechnology Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081,China.
authors.forename: G-Q
authors.initials: GQ
authors.lastname: Lu
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China.
authors.forename: C-X
authors.initials: CX
authors.lastname: Liu
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China.
authors.forename: G-M
authors.initials: GM
authors.lastname: Liang
authors.affiliation: Biotechnology Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081,China.
authors.forename: H-M
authors.initials: HM
authors.lastname: Cheng
mesh_terms: D000818:Animals; D001122:Arginine Kinase / Q000235:genetics / Q000378:metabolism*; D018507:Gene Expression Regulation, Developmental / Q000502:physiology*; D015971:Gene Expression Regulation, Enzymologic / Q000502:physiology*; D007814:Larva / Q000254:growth & development / Q000378:metabolism; D009036:Moths / Q000254:growth & development* / Q000378:metabolism; D034622:RNA Interference
chemical_list: D001122:Arginine Kinase
keywords: Helicoverpa armigera; RNA interference; arginine kinase; genes expression; pest control