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首页> 外文期刊>Journal of Molecular Biology Research >A Study on Testicular Development in Apteronotus albifrons
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A Study on Testicular Development in Apteronotus albifrons

机译：Apteronotus albifrons睾丸发育研究

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Apteronotus albifrons has its cloacal aperture located in the front of the body and on the back of the lower jaw. A. albifrons possess a pair of testes attached on the mesentery below its liver on the back of the abdominal cavity. In the early days of development, the testes are in translucent elongated thin strips in nude colour. As they develop, the testes will grow thicker and become white or creamy white in color. The rear end of the testes will split whereas the front end will merge to form the vas deferens which is connected to the external environment through the cloacal aperture. Testes of A. albifrons are lobular. There are six stages in its development. At 6 months of age, the testis structure shows clear medium with primary spermatocytes and abundant spermatogonia, suggesting that development is into the stageⅡ. At 8 months of age, testes in male A. albifrons are in the shape of a thin rod in white with blood vessels in presence. Germ cells consist of spermatogonia, primary spermatocytes and spermatocytes, indicating stageⅢ development. At 11 months of age, testes in male A. albifrons grow fuller and are in creamy white with apparent blood vessels present. Primary spermatocytes, secondary spermatocytes, spermatids and a small amount of sperms are president, indicating stageⅣ of development. At 15 months of age, testes in male A. albifrons swells and consist of a large amount of sperms, reaching full maturity. This is the stageⅥof development, after which is the stage featured by testes after spermiation.
机译：ApteronoTus albifrons的苜蓿孔径位于车身前面和下颌后部。 A. Albifrons拥有一对在腹腔背部下方的肠膜内附着在肠膜内的睾丸。在开发的早期，睾丸在裸色的半透明细长细条。在他们发展时，睾丸将增长较厚，变得白色或奶油白色。睾丸的后端将分割，而前端将合并以形成通过泄压孔连接到外部环境的输精管。 Albifrons的睾丸是小叶。发展中有六个阶段。在6个月的年龄时，Testis结构显示含有原发性精子细胞和丰富的精子的清晰培养基，表明发展是Ⅱ期。在8个月的时间里，在雄性A中的睾丸睾丸呈白色薄杆的形状，存在血管。生殖细胞由精寄生虫，原发性精子细胞和精胶质细胞组成，表明Ⅲ期发育。在11个月的年龄，在男性A中睾丸睾丸饱和度饱满，并在乳脂状白色，存在明显的血管。原发性精子细胞，二次精子细胞，精子和少量精子是总统，表明阶段的发育。在15个月的年龄，在雄性A中的睾丸睾丸膨胀并由大量的精子组成，达到全部成熟度。这是第一次开发，之后是精子后睾丸特征的舞台。

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