title: Nutritional Signaling Regulates Vitellogenin Synthesis and Egg Development through Juvenile Hormone in Nilaparvata lugens (Stål).
abstract: Insect female reproduction which comprises the synthesis of vitellogenein (Vg) in the fat body and its incorporation into developing oocytes, needs a large amount of energy and food resources. Our previous studies found that juvenile hormone (JH) regulates vitellogenesis in the brown planthopper, Nilaparvata lugens. Here, we report on the role of JH in nutrient-regulated Vg synthesis and egg development. We first cloned the genes coding for juvenile hormone acid methyltransferase (JHAMT) which is involved in JH biosynthesis and methoprene-tolerant (Met) for JH action. Amino acids (AAs) induced the expression of jmtN, while showing no effects on the expression of met using an artificial diet culture system. Reduction in JH biosynthesis or its action by RNA interference (RNAi)-mediated silencing of jmtN or met led to a severe inhibition of AAs-induced Vg synthesis and oocyte maturation, together with lower fecundity. Furthermore, exogenous application of JH III partially restored Vg expression levels in jmtN RNAi females. However, JH III application did not rescue Vg synthesis in these met RNAi insects. Our results show that AAs induce Vg synthesis in the fat body and egg development in concert with JH biosynthesis in Nilaparvata lugens (Stål), rather than through JH action.
authors.affiliation: College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China. lukaiqw@163.com.|State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China. lukaiqw@163.com.
authors.forename: Kai
authors.initials: K
authors.lastname: Lu
authors.affiliation: College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China. 18659105423@163.com.
authors.forename: Xia
authors.initials: X
authors.lastname: Chen
authors.affiliation: College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China. liuwting123@163.com.
authors.forename: Wen-Ting
authors.initials: WT
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China. 13076721421@163.com.
authors.forename: Xin-Yu
authors.initials: XY
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China. mingchen119@126.com.
authors.forename: Ming-Xiao
authors.initials: MX
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China. lsszhou@mail.sysu.edu.cn.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhou
mesh_terms: D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D004032:Diet; D005260:Female; D006430:Hemiptera / Q000254:growth & development / Q000378:metabolism*; D019476:Insect Proteins / Q000235:genetics / Q000378:metabolism; D007605:Juvenile Hormones / Q000378:metabolism*; D008780:Methyltransferases / Q000235:genetics / Q000378:metabolism; D009865:Oocytes / Q000378:metabolism; D009866:Oogenesis; D015398:Signal Transduction; D014819:Vitellogenins / Q000096:biosynthesis*
chemical_list: D000596:Amino Acids; D019476:Insect Proteins; D007605:Juvenile Hormones; D014819:Vitellogenins; D008780:Methyltransferases
keywords: Juvenile hormone; Nilaparvata lugens; RNA inteference; nutritional signaling; vitellogenesis