Critical roles for juvenile hormone and its esterase+ in the prepupa of Trichoplusia ni

Grace Jones, Bruce D. Hammock

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

In the caterpillar Trichoplusia ni (Lepidoptera: Noctuidae) it has been demonstrated by allatectomy that the appearance of juvenile hormone during the prepupal stage is crucial for the successful larval‐pupal ecdysis of most larvae. Application of juvenile hormone or juvenile hormone esterase inhibitors at key times disrupted normal development as well. Thus the subsequent disappearance of juvenile hormone is regulated by degradation by juvenile hormone esterase in addition to a hypothetical reduction in biosynthesis. This reduction in juvenile hormone titer in the prepupa is just as critical for normal development as was its previous appearance. These observations on the critical role of juvenile hormone in the prepupa are in contrast to observations in some other species. For instance, in the case of Manduca sexta (Lepidoptera: Sphingidae), juvenile hormone is considered only supplementary to the action of prothoracicotropic hormone in the postwandering stage and primarily is required for normal pupal development. It thus appears that even within the Lepidoptera the role of juvenile hormone in prepupal development can vary dramatically.

Original languageEnglish (US)
Pages (from-to)397-404
Number of pages8
JournalArchives of Insect Biochemistry and Physiology
Volume2
Issue number4
DOIs
StatePublished - 1985

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Keywords

  • allatectomy
  • esterase inhibition
  • juvenile hormone
  • juvenile hormone esterase
  • Trichoplusia ni

ASJC Scopus subject areas

  • Physiology
  • Biochemistry
  • Insect Science

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