publication . Article . 1992

Kopec revisited—Neuroendocrine regulation of metamorphosis in the gypsy moth (Lymantria dispar): Development of a larval in vivo assay for prothoracicotropic hormone

Belgaum S. Thyagaraja; Thomas J. Kelly; Edward P. Masler; Dale B. Gelman; Robert A. Bell; Richard B. Imberski;
Open Access
  • Published: 01 Nov 1992
Abstract
Abstract The role of the brain as a neuroendocrine regulator of metamorphosis in the gypsy moth, Lymantria dispar L. was originally demonstrated by Kopec more than 70 years ago. We have reexamined this role by determining haemolymph ecdysteroid titres, activity and responsiveness of the prothoracic glands, and growth of female last (i.e. fifth)-instar larvae in relation to secretion of the brain prothoracicotropic hormone (PTTH), the factor known to trigger moulting and metamorphosis in insects. The head critical period for secretion of PTTH in Lymantria reared at 25°C in a 16 h light-8 h dark cycle was shown by neck ligation to occur on day 7–8 of the fifth ins...
Subjects
Medical Subject Headings: animal structuresfungi
free text keywords: Insect Science, Physiology, Anatomy, Endocrinology, medicine.medical_specialty, medicine, Lymantria dispar, biology.organism_classification, biology, Moulting, Ecdysteroid, chemistry.chemical_compound, chemistry, Hemolymph, Lymantria, Prothoracicotropic hormone, Prothoracic gland, Internal medicine, Metamorphosis, media_common.quotation_subject, media_common
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publication . Article . 1992

Kopec revisited—Neuroendocrine regulation of metamorphosis in the gypsy moth (Lymantria dispar): Development of a larval in vivo assay for prothoracicotropic hormone

Belgaum S. Thyagaraja; Thomas J. Kelly; Edward P. Masler; Dale B. Gelman; Robert A. Bell; Richard B. Imberski;