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Zoomorphologie

, Volume 92, Issue 3, pp 191–200 | Cite as

Effects of light on ocelli of seastars

  • Richard M. Eakin
  • Jean L. Brandenburger
Article

Summary

Dark- and light-adapted ocelli of three seastars (Patina miniata, Leptasterias pusilla, Henricia leviuscula) were studied by transmission and scanning electron microscopy. In the dark-adapted state the process of each receptor cell is relatively devoid of clear vesicles. Numerous long microvilli arise from the tips and sides of the processes. Cilia from the sensory processes project into the lumen of an ocellus; they are unconnected to the microvilli. In light-adapted ocelli each process is filled with clear pinocytotic vesicles of varying size. The microvilli are now irregular. Many lie free in the lumen of an ocellus or within phagocytic vacuoles in the supportive and corneal cells. These findings are evidence of a microvillar (rhabdomeric) type of photoreceptor in seastars and of cyclic turnover of receptoral membrane.

Keywords

Electron Microscopy Scanning Electron Microscopy Developmental Biology Receptor Cell Receptoral Membrane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • Richard M. Eakin
    • 1
  • Jean L. Brandenburger
    • 1
  1. 1.Department of ZoologyUniversity of CaliforniaBerkeleyUSA

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