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The cytology of the vitellogenic stages of oogenesis in Drosophila melanogaster . I. General staging characteristics
Author(s) -
Cummings M. R.,
King R. C.
Publication year - 1969
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051280404
Subject(s) - vitellogenesis , biology , drosophila melanogaster , oocyte , cytoplasm , nurse cell , oogenesis , ultrastructure , microbiology and biotechnology , organelle , cytochemistry , anatomy , follicle , zona pellucida , embryo , endocrinology , biochemistry , gene
The cytology of the vitellogenic stages in the development of the oocyte of Drosophila melanogaster has been studied using whole mounts and sections of plastic‐embedded ovaries and single egg chambers for light microscopy and cytochemistry. The migrations, changes in morphology, and synthetic products of the follicle cells are described as a function of developmental stage. The follicle cells synthesize the egg coverings, the vitelline and chorionic membranes, and elaborate the micropyle and dorsal chorionic appendages. The changing structure of the nurse cell nucleus and changes in organelle composition of its cytoplasm are described. The nurse cells synthesize ribosomes, lipid droplets, and mitochondria. These components pass through the ring canal system into the oocyte, which increases in volume some 200,000 times during its 78 hours of development.