ULTRASTRUCTURAL OBSERVATIONS ON OOGENESIS IN DROSOPHILA
ULTRASTRUCTURAL OBSERVATIONS ON OOGENESIS IN DROSOPHILA
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DOI：
10.1002/jmor.1051370103
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发表时间：
1972-01-01
影响因子：
1.5
通讯作者：
MAHOWALD, AP
中科院分区：
文献类型：
--
作者：
MAHOWALD, AP
卵泡细胞和卵母细胞周质的超微结构描述在卵子发生阶段之前，期间，并立即随后，卵黄发生。果蝇的许多特征以前没有被描述过。有些卵黄出现在血蛋白的胞饮作用之前。然而，大部分的蛋白质卵黄形成时，周质充满了来自卵膜的微胞饮内陷和小管。这些小管保留了包被囊泡的内层材料特征，并与卵黄球融合。在卵母细胞的内质网或高尔基体中没有电子致密物质的积累。卵母细胞积累台盼蓝和铁蛋白。在卵黄积累最多的时期，卵泡细胞具有精致的内质网。相邻的细胞在它们的基部通过粘附无环藻连接，在细胞周围形成一条带，并通过间隙连接斑块连接。间隙连接也存在于滋养细胞和滤泡细胞之间。在绒毛膜形成过程中，滤泡细胞之间也出现分隔连接，与粘连小带相邻。
The ultrastructure of the follicle cells and oocyte periplasm is described during the stages of oogenesis immediately prior to, during, and immediately subsequent to, vitellogenesis. A number of features have not been described previously inDrosophila.Some yolk appears prior to pinocytosis of blood proteins. However, most of the protein yolk forms while the periplasm is filled with micropinocytotic invaginations and tubules derived from the oolemma. These tubules retain the internal layer of material characteristic of coated vesicles and are found to fuse with yolk spheres. No accumulation of electron‐dense material in the endoplasmic reticulum or Golgi of the oocyte is found. Both trypan blue and ferritin are accumulated by the oocyte.The follicle cells have an elaborate endoplasmic reticulum during the period of maximum yolk accumulation. Adjacent cells are joined at their base by azonula adhaerens, forming a band around the cells, and by plaques of gap junctions. Gap junctions are also present between nurse cells and follicle cells. During chorion formation, septate junctions also appear between follicle cells, adjacent to thezonula adhaerens.