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Journal of Experimental Biology 141,47-59 (1989)
Published by Company of Biologists 1989

Dye Transport Across the Retinal Basement Membrane of the Blowfly Calljphora Erythrocephala

E. WEYRAUTHER 1, J. G.H. ROEBROEK 2, and D. G. STAVENGA 2

1 Department of Biophysics, Laboratorium voor Algemene Natuurkunde, Rijksuniversiteit Groningen, Westersingel 34, NL-9718 CM Groningen, The Netherlands; Institut für Zoologie II, Universität Erlangen-Nürnberg, Staudtstrasse 5, D-8520 Erlangen, Federal Republic of Germany
2 Department of Biophysics, Laboratorium voor Algemene Natuurkunde, Rijksuniversiteit Groningen, Westersingel 34, NL-9718 CM Groningen, The Netherlands

In the blowfly, Calliphora erythrocephala, transport of dye into or out of the retina, following injection into the eye or thorax, was investigated, mainly by microspectrophotometry and fluorimetry. After injection into the eye, Phenol Red, Trypan Blue, Lucifer Yellow and 9-amino-acridine were transported out of the retina; Procion Yellow and Rhodamine-123 stayed in it. The time constants of this transport process were in the range 45-80 min at 23°C, depending on the dye. When Lucifer Yellow was injected into the thorax, it was transported into the retina. The transport of these dyes across the retina was inhibited by nitrogen, ouabain and low temperature, indicating that active processes are involved.

Key words: insect retina, dyes, transport, metabolism, blowflies

Accepted on July 12, 1988






© The Company of Biologists Ltd 1989