期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 17, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/ijms17030269
关键词
RNA inteference; Juvenile hormone; Nilaparvata lugens; nutritional signaling; vitellogenesis
资金
- National Natural Science Foundation of China [31272038]
- National Basic Research Program of China [2010CB126200]
- Fujian-Taiwan Joint Innovative Center for Germplasm Resources and cultivation of crop (Fujian Program) [[2015] 75]
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 (Stal), rather than through JH action.
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