Entwicklung und Lage der Augenpigmente bei Verschiedenen Drosophilamutanten

Zeutzschel, Brigitte

doi:10.1007/bf00889085

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1961

1993

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Cited by 3 publications

(1 citation statement)

References 9 publications

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“…From these facts, it might be assumed that there are two kinds of brown pigment, as suggested by Zentzschel (1958). A kind of brown pigment may be derived from quinone like substances.…”

Section: Discussionmentioning

confidence: 99%

Genetical and Biochemical Studies on the Red and Yellow Eye Pigments of <i>Drosophila melanogaster</i>

Taira

1961

The Japanese journal of genetics

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“…From these facts, it might be assumed that there are two kinds of brown pigment, as suggested by Zentzschel (1958). A kind of brown pigment may be derived from quinone like substances.…”

Section: Discussionmentioning

confidence: 99%

Genetical and Biochemical Studies on the Red and Yellow Eye Pigments of <i>Drosophila melanogaster</i>

Taira

1961

The Japanese journal of genetics

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Pterine als Wirkstoffe und Pigmente

Ziegler

1965

Ergebnisse der Physiologie und exper. Pharmakologie

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Atypical Granules in the Eyes of the White Mutant of Drosophila melanogaster Are Lysosome‐Related Organelles

Schraermeyer

Dohms

1993

Pigment Cell Research

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In the pigment cells of the white mutant of Drosophila melanogaster, as described earlier, two types of abnormal granules are found by conventional electron microscopy. However, both types of abnormal granules, in addition to those in pigment cell invaginations, are also present in the cytoplasm of the photoreceptor cells. Three enzymes (acid phosphatase, peroxidase, and tyrosinase) are localized within the eyes of wild type and white mutant Drosophila melanogaster by electron microscopy. Peroxidase activity is present in lamellar bodies close to the rhabdomeral microvilli of both fly types. However the organelles containing peroxidase activity are 6-fold more frequent in the wild type than in the mutant. Acid phosphatase is present in lamellar bodies between and at the bases of the rhabdomeral microvilli of the wild type, as well as in ommochrome granules of the photoreceptor cells. In the white mutant, however, acid phosphatase was located in electron lucent vacuoles in the cytoplasm of the receptor cells. These acid phosphatase-positive vacuoles also contained both types of abnormal granules. The latter result indicates that abnormal granules in the receptor cells originate from lysosomal degradation and that targeting of lysosomal enzymes is altered in the white mutant. Due to the tyrosinase activity in the hemolymph of flies, the extracellular spaces are electron dense after DOPA incubation. Since some abnormal granules within the photoreceptor cells are not surrounded by an extracellular space, they can be assumed to originate within the photoreceptor cells.

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Entwicklung und Lage der Augenpigmente bei Verschiedenen Drosophilamutanten

Cited by 3 publications

References 9 publications

Genetical and Biochemical Studies on the Red and Yellow Eye Pigments of <i>Drosophila melanogaster</i>

Genetical and Biochemical Studies on the Red and Yellow Eye Pigments of <i>Drosophila melanogaster</i>

Pterine als Wirkstoffe und Pigmente

Atypical Granules in the Eyes of the White Mutant of Drosophila melanogaster Are Lysosome‐Related Organelles

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