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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Spermiogenesis of the hangingfly Terrobittacus implicatus (Huang and Hua) (Mecoptera: Bittacidae)
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Spermiogenesis of the hangingfly Terrobittacus implicatus (Huang and Hua) (Mecoptera: Bittacidae)

机译：Hangingfly Terrobittacus的精子发生Implicatus（Huang和Hua）（MeCoptera：Bittacidae）

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摘要

The structure of spermatozoa is able to provide valuable characters in resolving phylogenic relationships in Metazoa, especially in insects. Such data, however, are greatly deficient in Mecoptera. Here, we studied the spermiogenesis and ultrastructure of spermin the hangingfly Terrobittacus implicatus (Huang and Hua) using transmission electron microscopy. The results show that the spermatogenesis of T. implicatus occurs within spermcysts, following a pattern commonly found in insects. The microtubular doublets of spermatid axoneme exhibit a hooklike projection from the B-subtubule in the early period, but the projection disappears in the mature stage. The mature spermatozoon of T. implicatus is a filiform cell that is pronouncedly elongated and has a bi-layered acrosome, a nucleus with two lateral longitudinal grooves, a neck region with the centriole adjunct, a flagellum with a simple 9 + 2 axoneme, two extra-axonemal accessory structures, two accessory bodies, and two mitochondrial derivatives of unequal size, and a prominent glycocalyx. The basic structure of spermatozoa of T. implicatus is similar to that of other Mecoptera studied. However, this species shows characteristics unique in Bittacidae, such as the reniform appearance of the centriole adjunct, two triangular accessory bodies with granular materials, and two asymmetric mitochondrial derivatives with a circular profile in cross-section. The potential utilization of the spermultrastructure for understanding the phylogeny of Bittacidae is briefly discussed.
机译：精子的结构能够提供有价值的特征来解决美唑群中的系统发育关系，尤其是昆虫。然而，这些数据在梅普特拉大大缺乏。在这里，我们使用透射电子显微镜研究了Hangingfly Terrobittacus Implicatus（Huang和Hua）的精子发生和超微结构。结果表明，在昆虫中常见的图案之后，在精子内发生的T. Implicatis的精子发生。精子双胞胎轴承的微仔轴突在早期从B-upmtubule中表现出钩状突起，但是在成熟阶段中投影消失。 T. Implicatus的成熟精子是一个丝状细胞，丝细胞被伸长细长，具有双层顶层，具有两个横向纵向凹槽的核，颈部区域与厘米辅助，具有简单的9 + 2轴突的鞭毛，两个额外的Axonemal辅助结构，两个配件体和两个线粒体衍生物的不等大小，以及一个突出的甘油癌。 T. Implicatus的精子的基本结构类似于所研究的其他MeCoptera。然而，该物种表明了Bittacidae中独特的特征，例如沿甲基辅助的肾性外观，具有颗粒材料的两个三角形辅助体，以及两个具有圆形轮廓的两种不对称线粒体衍生物的横截面。简要讨论了对理解精药的潜在利用，以了解Bittacidae的系统发育。

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