Title
Presence of [<tex>$His^{7}$</tex>]-corazonin in the central nervous system of a newly isolated albino strain of **Schistocerca gregaria** (Orthoptera : Acrididae) : mass spectrometric and immunocytochemical evidencePresence of [<tex>$His^{7}$</tex>]-corazonin in the central nervous system of a newly isolated albino strain of **Schistocerca gregaria** (Orthoptera : Acrididae) : mass spectrometric and immunocytochemical evidence
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Subject
Biology
Source (journal)
European journal of entomology / Euromonitor
Volume/pages
100(2003):3, p. 455-458
ISSN
1210-5759
ISI
000184932700018
Carrier
E
Target language
English (eng)
Abstract
An inbred strain of a newly isolated spontaneous albino mutant of Schistocerca gregaria (Forsk.) was examined for the presence of the neuropeptide [His(7)]-corazonin by immunocytochemical and mass spectrometric methods. It was concluded that this peptide is definitely present in a limited number of neurosecretory cells in the pars lateralis as well as in the corpora cardiaca (CC). Injection of either synthetic [His(7)]-corazonin or of extracts of CC of the normal coloured phenotype of S. gregaria failed to induce darkening of the cuticle, while albino Locusta migratoria, used as a positive control, turned dark. The conclusion is that the cause of albinism in the new S. gregaria albino is probably due to a defect in the receptor system for [His(7)]-corazonin or in the biosynthetic pathway of melanin.
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