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Influence of photoperiod on dense-core vesicles and synaptic ribbons of pinealocytes of the Djungarian hamster (Phodopus sungorus)

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Summary

The ultrastructure of the superficial part of the pineal gland ofPbodopus sungorus was examined. Dense-core vesicles and synaptic ribbons in pinealocytes of animals kept under different photoperiods were counted, revealing marked differences. Pinealocytes of short-day animals compared with long-day animals exhibit an increase of dense-core vesicles coincident with a decrease of synaptic ribbons. It is assumed that the corresponding numerical changes of these organelles are of functional significance in relation to pineal secretory activity.

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  1. J. Fechner

    Present address: Pathologisches Institut der Universität, Domagkstrasse 17, D-4400, Münster, Federal Republic of Germany

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  1. Institute of Anatomy, University of Münster, Münster, Federal Republic of Germany

    J. Fechner

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Fechner, J. Influence of photoperiod on dense-core vesicles and synaptic ribbons of pinealocytes of the Djungarian hamster (Phodopus sungorus). J. Neural Transmission 67, 139–145 (1986). https://doi.org/10.1007/BF01243366

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  • DOI: https://doi.org/10.1007/BF01243366

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