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Published on: June 30, 2011
Insulin-like peptides regulate vitellogenesis and oviposition in the green lacewing, Chrysopa septempunctata
T T Zhang1, G C Zhang1, F F Zeng2
1School of Forestry, Northeast Forestry University,Harbin,Heilongjiang 150040,China.
Abstract:
Insulin-like peptides (ILPs) act through a conserved insulin signaling pathway and play crucial roles in insect metabolism, growth, reproduction, and aging. Application of bovine insulin is able to increase vitellogenin (Vg) mRNA and protein levels in female insects. Here, we first show that injection of bovine insulin into previtellogenic Chrysopa septempunctata female adults promoted ovarian growth, increased Vg protein abundance, elevated reproductive performance, and enhanced protease activity. These data suggested that ILPs play crucial roles in reproductive regulation of the green lacewing, C. septempunctata.
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