Elsevier

Neuroscience Letters

Volume 73, Issue 1, 2 January 1987, Pages 33-37
Neuroscience Letters

Diversity in neurohaemal organs for homologous neurosecretory cells in different insect species as demonstrated by immunocytochemistry with an antiserum to molluscan cardioexcitatory peptide

https://doi.org/10.1016/0304-3940(87)90026-7Get rights and content

Abstract

Neurosecretory cells were histochemically identified in the thoracic ganglia of the Colorado potato beetle and Drosophila melanogaster with an antiserum to the molluscan cardioexcitatory neuropeptide FMRFamide (Phe-Met-Arg-Phe-NH2). These cells and the FMRFamide-immunoreactive neurosecretory cells identified in a locust are most likely homologous. The neurosecretory axon terminals in the 3 species use different neurohaemal organs. Such a structural diversity in release sites of apparently homologous neurosecretory cells in different species may account for the large structural variability in neurohaemal organs in insects in general.

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    Citation Excerpt :

    The close association of corazonin-immunoreactive axons with the corpora allata have similarly been interpreted to suggest the possibility of direct regulation of this gland by corazonin (Choi et al., 2008). As pointed out elsewhere insect neurohemal organs need a physical or trophic support and use the surface of different organs for this purpose (Veenstra, 1987; Carr and Taghert, 1988a,b; Wall and Taghert, 1991; Allan et al., 2003), hence the close physical proximity of corazonin axons and the AKH producing cells or the corpora allata do not necessarily imply a functional association. So far physiological effects of corazonin for non-insect arthropods have only been described for the crayfish Procambarus clarkii.

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