Role of animal pole protuberance and microtubules during meiosis in sea cucumber Apostichopus japonicus oocytes

文献类型： 外文期刊

第一作者： Chang Yaqing

作者： Chang Yaqing;Yu Jiaping;Sun Huiling;Pang Zhenguo;Pang Zhenguo

作者机构：

关键词： Apostichopus japonicus;oocyte protuberance;oocyte maturation;microtubule organizing center;polar body formation

期刊名称：CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY （ 影响因子：1.068； 五年影响因子：0.983 ）

ISSN： 0254-4059

年卷期： 2010 年 28 卷 3 期

页码：

收录情况： SCI

摘要： Fully grown oocytes of Apostichopus japonicus have a cytoplasmic protuberance where the oocyte attaches to the follicle. The protuberance and the oolamina located on the opposite side of the oocyte indicate the animal-vegetal axis. Two pre-meiotic centrosomes are anchored to the protuberance by microtubules between centrosomes and protuberance. After meiosis reinitiation induced by DTT solution, the germinal vesicle (GV) migrates towards the protuberance. The GV breaks down after it migrates to the oocyte membrane on the protuberance side. The protuberance then contracts back into the oocyte and the first polar body extrudes from the site of the former protuberance. The second polar body forms beneath the first. Thus the oocyte protuberance indicates the presumptive animal pole well before maturation of the oocyte.

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