Vitellogenin synthesis in female larvae of the gypsy moth, Lymantria dispar (L.): suppression by juvenile hormone
1992
Fescemyer, H.W. | Masler, E.P. | Davis, R.E. | Kelly, T.J.
1. Fat body from feeding-phase, last instar gypsy moth females incorporates L-[35S]methionine in vitro into two vitellogenins with the same molecular masses (165 and 180 kDa) as the apo-vitellogenins found in the hemolymph and the apo-vitellins in the eggs. 2. Both apo-vitellogenins are observed in the medium of fat body cultures, but only the 180 kDa apo-vitellogenin is observed in extracts of cultured tissue. 3. Synthesis and accumulation of the apo-vitellogenins are suppressed in a dose-dependent manner by topical treatment with the juvenile hormone analog, methoprene, prior to day 4. 4. This suppression suggests that a declining juvenile hormone titre is involved in the initiation of vitellogenin synthesis.
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