两种叶猴睾丸形态及精子发生(链翅目:叶猴科)

Marcella Carcupino , Jeyaraney Kathirithamby , Massimo Mazzini
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引用次数: 10

摘要

采用光镜和电镜技术对两种链翅目昆虫——细角棘猴(Elenchus tenuicornis)和日本棘猴(e.japonicus)睾丸超微结构和精子发生进行了研究。在这两个物种中,睾丸都是成对的,由几个形状不规则的大卵泡组成。每个卵泡由一个被薄上皮包围的生殖细胞克隆组成。在幼虫期和蛹期,每个睾丸的所有生殖细胞同步发育,在羽化期,性腺只含有成熟的精子。最有趣的发现之一是由核膜开孔部分包围的一个大核泡的形态发生。这个囊泡包含一个电子密集的球形结构,即染色质体。在精子发生结束时,核泡及其染色质体与多余的细胞质一起消失。在睾丸管腔和吞噬细胞的细胞质内可见含有核囊泡的大滴残余细胞质。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Testis morphology and spermatogenesis in two species of Elenchus (Strepsiptera : Elenchidae)

Testes ultrastructure and spermatogenesis were studied in two species of Strepsiptera (Insecta), namely, Elenchus tenuicornis and E. japonicus, using light and electron microscopy. In both species, the testis is paired and consists of several large irregularly shaped follicles. Each follicle consists of a single clone of germ cells surrounded by a thin epithelium. During the larval and pupal stages, all the germ cells of each testis develop synchronously, and at eclosion, the gonads contain solely mature sperm. One of the most interesting findings is the morphogenesis of a large nuclear vesicle bounded by the fenestrate part of the nuclear envelope. This vesicle contains an electron-dense spherical structure, the chromatoid body. At the end of spermiogenesis, both the nuclear vesicle and its chromatoid body are eliminated with the excess cytoplasm. Large drops of residual cytoplasm containing several nuclear vesicles are present in the lumen of the testis and inside the cytoplasm of phagocytic cells.

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