Distribution of Putative Neurotransmitters in the Brain of the European Corn Borer, 'Ostrinia Nubilalis.

摘要

Radioautographic localization of three putative neurotransmitters in the brain of larvae of the European corn borer was studied by electron microscopy. Acetylcholine and dopamine were found to be accumulated in median neurosecretory cells. Both acetylcholine and dopamine were preferentially found in glial cells as compared to neuronal cells. This may be indicative of active participation of glial cells in a blood-brain barrier in the intact brain. Gamma-aminobutyric acid was not accumulated by any particular cell in the brain, but was apparently excluded to the periphery of the ganglion. It is suggested that dopamine, or more likely an immediate metabolite may be involved in an endogenous time measuring system and/or diapause induction-termination. (Author)