title: Dendroctonus armandi (Curculionidae: Scolytinae) cytochrome P450s display tissue specificity and responses to host terpenoids.
abstract: Bark beetles oxidize the defensive allelochemicals of their host trees both to detoxify them and convert them into components of their pheromone systems which were catalyzed by cytochrome P450 enzymes (CYPs) and occur in different tissues of the insect. We study P450 genes in the Chinese white pine beetle (Dendroctonus armandi), and some bio-information analysis was done for the full-length deduced amino acid sequences. The tissue specificity of these P450 genes was determined in three tissues (antenna, gut and reproductive organs). Differential expression of the P450 genes was observed between sexes, and within these significant differences exposed to stimuli (α-pinene (1:1 racemic mix), (S)-(-)-α-pinene, (S)-(-)-β-pinene, (+)-3-carene, (±)-limonene and turpentine oil) at 24h. Increased expression of P450 genes suggested that they play a role in the detoxification of monoterpenes released by the host trees. The different transcript accumulation patterns of these bark beetle P450 genes provided insight into ecological interactions of D. armandi with its host pine.
authors.affiliation: College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China.
authors.forename: Lulu
authors.initials: L
authors.lastname: Dai
authors.affiliation: College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China.
authors.forename: Mingyuan
authors.initials: M
authors.lastname: Ma
authors.affiliation: College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China.
authors.forename: Guanqun
authors.initials: G
authors.lastname: Gao
authors.affiliation: College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China. Electronic address: chenhui@nwsuaf.edu.cn.
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D003577:Cytochrome P-450 Enzyme System / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D005260:Female; D005786:Gene Expression Regulation / Q000187:drug effects; D008297:Male; D009928:Organ Specificity; D028223:Pinus; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D051381:Rats; D013729:Terpenes / Q000494:pharmacology*; D048889:Weevils / Q000201:enzymology* / Q000235:genetics* / Q000502:physiology
chemical_list: D012333:RNA, Messenger; D013729:Terpenes; D003577:Cytochrome P-450 Enzyme System
keywords: Allelochemicals; Chinese white pine beetle; Cytochrome P450; Tissue-specific