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

Effects of light on ocelli of seastars

  • Richard M. Eakin
  • Jean L. Brandenburger


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.


Electron Microscopy Scanning Electron Microscopy Developmental Biology Receptor Cell Receptoral Membrane 
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  1. Blest, A.D.: The rapid synthesis and destruction of photoreceptor membrane by a dinopid spider: a daily cycle. Proc. R. Soc. London200, 463–483 (1978)Google Scholar
  2. Dilly, P.N.: Further observations of transport within paddle cilia. Cell Tissue Res.185, 105–113 (1977)Google Scholar
  3. Eakin, R.M.: Lines of evolution of photoreceptors. In: General physiology of cell specialization (D. Mazia, A. Tyler, eds.), pp. 393–425. New York-San Francisco-Toronto-London: McGraw-Hill 1963Google Scholar
  4. Eakin, R.M.: Evolution of Photoreceptors. In: Evolutionary biology, Vol.II (T. Dobzhansky, M.K. Hecht, W.C. Steere, eds.), pp. 194–242. New York: Appleton-Century-Crofts 1968Google Scholar
  5. Eakin, R.M.: Structure of invertebrate photoreceptors. In: Photochemistry of vision. Handbook of sensory physiology, Vol. VII/1 (H.J.A. Dartnall, ed.), pp. 625–684. Berlin-Heidelberg-New York: Springer 1972Google Scholar
  6. Eakin, R.M., Martin, G.G., Reed, C.T.: Evolutionary significance of fine structure of Archiannelid eyes. Zoomorphologie88, 1–18 (1977)Google Scholar
  7. Eakin, R.M., Westfall, J.A.: Further observations on the fine structure of some invertebrate eyes. Z. Zellforsch.62, 310–332 (1964)Google Scholar
  8. Eisenman, E.A., Das, N.K., Alfert, M.: Concanavalin A induced changes in the submembranous contractile structure in fertilized eggs ofUrechis caupo. In: Abstracts. The American Society for Cell Biology. Seventeenth Annual Meeting. J. Cell Biol.75, 264a (1977)Google Scholar
  9. Emerson, C.J.: Larval development of the sea star,Leptasterias polaris, with particular reference to the optic cushion and ocelli. In: Scanning electron microscopy, Vol. II, Proceedings of the workshop on other biological applications of the SEM/STEM, pp. 631–638. Chicago: IIT Research Institute 1977Google Scholar
  10. Hall, M.O.: Phagocytosis of light- and dark-adapted rod outer segments by cultured pigment epithelium. Science202, 526–528 (1978)Google Scholar
  11. LaVail, M.M.: Rod outer segment disk shedding in rat retina: relationship to cyclic lighting. Science194, 1071–1074 (1976)Google Scholar
  12. Sage, M.: Polyethylene glycol distearate 600 with 10% 1-hexadecanol; a superior embedding wax for warm climates. Stain Technol.47, 313–315 (1972)Google Scholar
  13. Salvini-Plawen, L.v., Mayr, E.: On the evolution of photoreceptors and eyes. In: Evolutionary Biology, Vol. X (M.K. Hecht, W.C. Steere, B. Wallace, eds.), pp. 207–263. New York-London: Plenum 1977Google Scholar
  14. Tamarin, A., Lewis, P., Askey, J.: Specialized cilia of the byssus attachment plaque forming region inMytilus califorianus. J. Morphol.142, 321–328 (1974)Google Scholar
  15. Vanfleteren, J.R., Coomans, A.: Photoreceptor evolution and phylogeny. Z. Zool. Syst. Evolutionsforsch.14, 157–169 (1976)Google Scholar
  16. Vaupel-von Harnack, M.: Über den Feinbau des Nervensystems des Seesternes (Asterias rubens L.). III. Mitteilung die Struktur der Augenpolster. Z. Zellforsch.60, 432–451 (1963)Google Scholar
  17. Yamamoto, M., Yoshida, M.: Fine structure of the ocelli of a synaptid holothurian,Opheodesoma spectabilis, and the effects of light and darkness. Zoomorphologie90, 1–17 (1978)Google Scholar
  18. Young, R.W.: The daily rhythm of shedding and degradation of cone outer segment membranes in the lizard retina. J. Ultrastruct. Res.61, 172–185 (1977)Google Scholar

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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