• Applied Microscopy
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• v.29 no.4
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• pp.451-457
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• 1999

Ultrastructure of adult Drosophila ocellus was compared with conventional electron microscopic method and osmium impregnation. When osmium impregnation was applied, some organelles of cells were strongly stained. Especially, subrhabdomeric cisternae (SRC) were strongly stained and showed network-iike structure as in compound eye. Other organelles including SSC, ER, nuclear envelope, pigment granules and mitochondria were also strongly stained. These organelles are known as a general calcium ion reservoir. In conclusion, the strong effect of light and shade by osmium impregnation was regarded as a result of strong binding between calcium ion and osmium tetroxide. Thus, we agree to the opinion that osmium impregnation is very useful methods to the comparative morphology of cell organelles.

• Journal of Life Science
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• v.9 no.6
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• pp.709-714
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• 1999

Ultrastructure of ocellar system was studied in adult Drosophila melanogaster. Ocellus was composed of terminal receptors, interneuron and glia. These three part showed different brightness each other and each component was distinct. In the glial cell, rER was abundant, and terminal receptors and interneuron showed numerous microtubules, special transporting system. The terminal receptors have particular structure referred as capital projection connecting the terminal receptor to glia. In synaptic active zone between terminal receptor and interneuron, ribbon-like structures and synaptic vesicles around the structures were frequently observed. In addition, the cross section of giant interneuron was also observed.