Developmental Changes in Lymantria Dispar (L.) Prothoracicotropic Hormone Activity from Embryo to Adult
Prothoracicotropic hormone (PTTH) in the brains of fifth instar Lymantria dispar larvae (Kelly et al., 1986; Masler et al., 1986) is presumably the factor(s) postulated by Kopec (1922) to control metamorphosis in L. dispar. We have extended our studies on L. dispar PTTH to other developmental stages (Masler et al., 1988) and now report PTTH activity in embryonic through adult tissue (see also Bell et al., Kelly et al, Thyagaraja et al., this volume). Embryonic PTTH has been reported for both Bombyx mori (Chen et al., 1986, 1987; Fugo et al., 1987) and Manduca sexta (Dorn et al, 1987) and developmental stage-related activation of M. sexta prothoracic glands (PGs) in vitro has been observed (Bollenbacher et al., 1984).
KeywordsBoiling Kelly Ecdysone
Unable to display preview. Download preview PDF.
- Chen J.H., Fugo H., Nakajima M., Nagasawa H. and Suzuki A. (1986) The presence of neurohormonal activities in embryos of the silkworm, Bombyx mori. J. Seric. Sci. Jpn. 55: 54–57.Google Scholar
- Dorn A., Gilbert L.I. and Bollenbacher W.E. (1987) Prothoracicotropic hormone activity in the embryonic brain of the tobacco hornworm, Manduca sexta. J. Comp. Physiol.-B. 157: 279–283.Google Scholar
- Kelly T.J., Masler E.P., Thyagaraja B.S., Bell R.A. and Borkovec A.B. (1986) Prothoracicotropic hormone stimulation of ecdysone synthesis by the prothoracic glands of the gypsy moth, Lymantria dispar. In Insect Neurochemistry and Neurophysiology-1986. (Ed. by Borkovec A.B. and Gelman D.B.) pp. 327–330, Humana Press, Clifton, New Jersey.Google Scholar
- Masler E.P., Kelly T.J., Thyagaraja B.S., Woods C.W., Bell, R.A. and Borkovec A.B. (1986) Discovery and partial characterization of the prothoracicotropic hormones of the gypsy moth, Lymantria dispar. In Insect Neurochemistry and Neuro-physiology-1986 (Ed. by Borkovec A.B. and Gelman,D.B.), pp. 331–334, Humana Press, Clifton, New Jersey.Google Scholar
- Masler E.R., Kelly T.J., Thyagaraja B.S., Davis R.E., Bell, R.A. and Borkovec A.B. (1988) Ecdysteroid activity in the gypsy moth, Lymantria dispar: identification of prothoracicotropic hormones from embryo through adult. Proc. Int’l. Congr. Entomology. 18: 120.Google Scholar