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  • Title: Influence of photoperiod on dense-core vesicles and synaptic ribbons of pinealocytes of the djungarian hamster (Phodopus sungorus).
    Author: Fechner J.
    Journal: J Neural Transm; 1986; 67(1-2):139-45. PubMed ID: 3783149.
    Abstract:
    The ultrastructure of the superficial part of the pineal gland of Phodopus 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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