| 革胡子鲇原始生殖细胞的起源、迁移及性腺分化 |
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| 引用本文： | 刘少军.革胡子鲇原始生殖细胞的起源、迁移及性腺分化[J].水生生物学报,1991,15(1):1-7. |
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| 作者姓名： | 刘少军 |
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| 作者单位： | 湖南省生物研究所 长沙 |
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| 摘 要： | 革胡子鲇又称埃及胡子鲇,是一种多次产卵类型的硬骨鱼。作者用组织学、组织化学、电子显微镜等方法对革胡子鲇的原始生殖细胞(Primordial germ cells,PGCs)的起源、特征、迁移方式和性腺分化进行了研究。实验结果:PGCs来源于内胚层;PGCs的细胞质中存在着一种与生殖细胞有关的电子致密物——生殖质(Germ plasm);PGCs在迁移过程中有主动迁移的能力;PGCs到达生殖嵴的部位后,与生殖上皮细胞(Epithelisl cells)一起共同形成原始性腺;原始性腺分别逐步向精巢和卵巢分化;生殖质与性腺的分化有密切关系;卵巢的分化比精巢早。
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| 关 键 词： | 革胡子鲇 原始生殖细胞 迁移 性腺分化 生殖质 超微结构 |
STUDIES ON THE ORGIN AND MIGRATION OF THE PRIMORDIAL GERM CELLS AND GONAD DIFFERENTIATION IN CLARIAS LAZERA |
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| Liu Shaojun.STUDIES ON THE ORGIN AND MIGRATION OF THE PRIMORDIAL GERM CELLS AND GONAD DIFFERENTIATION IN CLARIAS LAZERA[J].Acta Hydrobiologica Sinica,1991,15(1):1-7. |
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| Authors: | Liu Shaojun |
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| Abstract: | In this paper, the primordial germ cells (PGCs) and gonad differentiation of Clarias lazera are studied by means of light-and electron-microscope. The germ plasm associated with the germ cells is found in the cytoplasm of the PGCs and developing oogonia and spermatogonia. The PGCs come from the endoderm which is near the periblast nucleus. The PGCs have the ability to move actively during migration. After reaching the site of the future gonad, the PGCs and epithelial cells form the primordial gonad which gradually differentiates into testis or ovary. The germ plasm is closely associated with the differentiation of the primordial gonad. The ovary appears earlier than the testis. |
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| Keywords: | Clarias lazera Primordial germ cell Migration Gonad differentiation Germ plasm Ultrastructure |
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