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Control of corpus allatum activity inDiploptera punctata: roles of the pars intercerebralis and pars lateralis

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Summary

Control of the corpora allata (CA) ofDiploptera punctata is maintained by at least 2 factors. The glands are directly inhibited by an allatostatin arriving at the CA via the nervi corporis cardiaci I (NCC I). Destruction of the putative source (median neurosecretory cells, MNC) of the allatostatin by radio-frequency (RF) cautery relieved the inhibition imposed on the CA of virgin females, and the glands became active. Similarly, destruction of the lateral neurosecretory cells (LNC) also relieved the inhibition. We propose that the LNC stimulated the MNC to release allatostatin. RF-cautery did not result in the activation of CA of pregnant or ovariectomized females. Activation of the CA may therefore require not only absence of the inhibitory factor but also the presence of a stimulatory one (perhaps from the ovary).

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Authors and Affiliations

  1. Department of Zoology, University of Toronto, 25 Harbord Street, M5S 1A1, Toronto, Ontario, Canada

    R. P. Rüegg, D. J. Lococo & S. S. Tobe

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  1. R. P. Rüegg
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  2. D. J. Lococo
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  3. S. S. Tobe
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Rüegg, R.P., Lococo, D.J. & Tobe, S.S. Control of corpus allatum activity inDiploptera punctata: roles of the pars intercerebralis and pars lateralis. Experientia 39, 1329–1334 (1983). https://doi.org/10.1007/BF01990089

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