ULTRASTRUCTURE OF THE PREPARATIVE PHASE OF CELL-DEATH IN THE LARVAL FAT-BODY OF DROSOPHILA-MELANOGASTER
ULTRASTRUCTURE OF THE PREPARATIVE PHASE OF CELL-DEATH IN THE LARVAL FAT-BODY OF DROSOPHILA-MELANOGASTER
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DOI：
10.1016/0040-8166(84)90047-8
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发表时间：
1984-01-01
期刊：
影响因子：
2.6
通讯作者：
FORREST, EC
中科院分区：
文献类型：
--
作者：
BUTTERWORTH, FM;FORREST, EC
Progressive changes in the ultrastructure of the larval fat body of D. melanogaster were studied during the 3rd instar. In addition to EM, light microscopy and morphometric stereology were employed to evaluate the tissue at five 12-hr intervals: 48, 60, 72, 84 and 96 h after hatching from the egg. Lipid and glycogen were stored throughout the instar; protein is stored in the form of cytoplasmic granules mainly during the final 24 h. The cells increased in cross-sectional area, and there was a concomitant increase in the relative amounts of these substances. Based on morphological characteristics there were 3 types of protein granules called dense granules (D), heterogeneous granules (H) and autophagic vacuoles. The morphology, size range, time of appearance and changes in frequency of these granules suggested that the H type arose from D granules, and that the autophagic vacuoles were derived from D and H types. Morphological evidence indicated D granules have the unusual characteristic of forming in the intercellular space before entering the cytoplasm.
