.... 1 Department of Anatomy, Swing Building 217H, University of North Carolina at Chapel Hill, Chapel Hill, NC27514, USA 24 09 1986 © 1987 by Company of Biologists 1987 Manduca sexta prothoracicotropic hormone juvenile hormone ecdysteroids For over half a century...

...Wendy A. Smith; M. F. Bowen; Walter E. Bollenbacher; Lawrence I. Gilbert ABSTRACT Prothoracic glands from diapausing pupae of the tobacco hornworm, Manduca sexta , synthesize markedly less ecdysone in vitro in response to prothoracicotropic hormone (PTTH) than do glands from non-diapausing pupae...

... activated in vitro by the prothoracicotropic hormone (PTTH), the effect of JH on the PG does not involve suppression of gland sensitivity to PTTH. The locus of the JH effect was determined to be the brain-retrocerebral complexes (Br-CC-CA), on the basis of experiments which tested the effect of implanted Br...

... neuroendocrine system. In the case of pupal diapause in lepidopterous insects the accepted concept has been that environmental cues suppress the synthesis and/or release of the primary effector of insect postembryonic development, the cerebral neuropeptide, prothoracicotropic hormone (PTTH) ( Denlinger, 1984...