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Connections between adjacent retinula cell columns in the eye of Ephestia kuehniella Zeller (Lepidoptera, Pyralididae)

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Summary

Connections were found between retinula cells of adjacent retinula cell columns in the eye of Ephestia. The connections occur most frequently at the level of the retinula cell nuclei and may involve two or more retinula columns simultaneously. The absence of specialized structural modifications of the membranes and the presence of pigment granules at the level of the connections or distal to them indicates that these connections are probably not involved in selective chemical or electrical communication nor in light transmission. It is suggested that the connections may serve tactily to coordinate cytoplasmic movement in adjacent retinula columns during light-dark adaptation.

Zusammenfassung

Im Auge von Ephestia kommen Kontakte zwischen den Zellen benachbarter Retinulae vor. Diese Kontakte finden sich am häufigsten in der Kernregion der Retinulazellen und können 2 oder mehr Retinulae miteinander verbinden. Da keine besonderen Membranstrukturen in der Kontaktzone beobachtet wurden und da andererseits die Retinulazellen auf diesem Niveau und weiter distal Pigmentgranula enthalten, scheinen diese Kontakte weder die Zellen chemisch bzw. elektrisch zu koppeln noch Reizlicht zu übertragen. Vielmehr wird angenommen, daß die Verlagerungen des Cytoplasmas bei Hell-Dunkeladaptation in benachbarten Retinulae durch die gegenseitige Berührung koordiniert werden.

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Senior U. S. Scientist Awardee of the Alexander von Humboldt Foundation. Thanks to Prof. Dr. A. Fischer for his suggestions and assistance.

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Gottlieb, F.J. Connections between adjacent retinula cell columns in the eye of Ephestia kuehniella Zeller (Lepidoptera, Pyralididae). Cell Tissue Res. 153, 189–193 (1974). https://doi.org/10.1007/BF00226607

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  • DOI: https://doi.org/10.1007/BF00226607

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