FINE STRUCTURE OF POLE CELLS AND POLAR GRANULES IN DROSOPHILA MELANOGASTER
FINE STRUCTURE OF POLE CELLS AND POLAR GRANULES IN DROSOPHILA MELANOGASTER
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DOI：
10.1002/jez.1401510302
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发表时间：
1962-01-01
影响因子：
--
通讯作者：
MAHOWALD, AP
中科院分区：
文献类型：
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作者：
MAHOWALD, AP
在果蝇胚胎中，极细胞的精细结构与胚层形成对比。极细胞有密度较低的细胞质、环状片层、中空的球形核仁和极颗粒。极地颗粒是致密的颗粒体，不被膜包围，含有RNA。它们在卵黄发生的早期阶段出现在第9阶段的卵母细胞中，直径0.2[亩]的致密小体，在生长阶段附着在线粒体上。这种与线粒体的接触在受精后就会消失。对胚胎室和年轻卵母细胞中的极性颗粒的搜索没有发现任何可以确定的东西，但描述了各种不受膜约束的其他物体。
The fine structure of the pole cells is contrasted with the blastoderm in Drosophila melanogaster embryos. A less dense cytoplasm, annulate lamellae, hollow spherical nucleoli and polar granules distinguish the pole cells. The polar granules are dense granular bodies, not bounded by a membrane and contain RNA. They arise in stage 9 oocytes during early stages of vitellogenesis as small dense bodies 0.2 [mu] in diameter, which become attached to mitochondria during the growth phase. This contact with mitochondria is lost after fertilization. A search for polar granules in the germarium and young oocytes did not disclose any that could be identified with certainity, but various other bodies, not bounded by membranes, are described.