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Regulation of pheromone biosynthesis in the “Z strain” of the European corn borer, Ostrinia nubilalis

✍ Scribed by H.S. Eltahlawy; J.S. Buckner; S.P. Foster

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
149 KB
Volume
65
Category
Article
ISSN
0739-4462

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✦ Synopsis

Abstract

The regulation of pheromone biosynthesis by the neuropeptide PBAN in the Z strain of the European corn borer, Ostrinia nubilalis, was investigated using labeled intermediates. Injection of radiolabeled acetate showed PBAN did not influence the de novo synthesis of saturated fatty acids in the gland. When deuterium‐labeled myristic acid was topically applied to the gland, females injected with PBAN produced more labeled pheromone than did control females, indicating that PBAN controls one of the later steps of pheromone biosynthesis. Although more myristic acid was Δ11‐desaturated in the gland in the presence of PBAN, this was counterbalanced by less Δ11‐desaturation of palmitic acid, indicating that desaturase activity did not change overall. This change in flux of myristic acid through to pheromone was shown to be caused by increased reduction of fatty acid pheromone precursors occurring in the presence of PBAN. Arch. Insect Biochem. Physiol. 65:29–38, 2007. © 2007 Wiley‐Liss, Inc.

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