一种脉翅目昆虫中带有附属大微管的巨型精子细胞。

Giant sperm cells with accessory macrotubules in a neuropteran insect.

作者信息

Dallai Romano, Lupetti Pietro, Osella Giuseppe, Afzelius Björn A

机构信息

Department of Evolutionary Biology, University of Siena, Via A. Moro 2, I-53100 Siena, Italy.

出版信息

Tissue Cell. 2005 Oct;37(5):359-66. doi: 10.1016/j.tice.2005.05.002.

DOI:10.1016/j.tice.2005.05.002

PMID:16043201

Abstract

The flagellar axoneme of the atypical spermatozoa (paraspermatozoa) of Mantispa perla (Neuroptera, Planipennia) contains accessory microtubules or rather macrotubules that are 55 nm in diameter and that has a wall consisting of about 40 protofilaments. The sperm tail further contains two giant mitochondrial derivatives, which during spermiogenesis store an electron dense material. The mature spermatozoon has a flattened acrosome and a elliptical nucleus. These giant spermatozoa may furnish nutrients to the functional spermatozoa (euspermatozoa) when they reach the female genital tracts or/and they function in sperm competition filling the spermatheca.

摘要

螳蛉（脉翅目，扁翅亚目）的非典型精子（副精子）的鞭毛轴丝含有辅助微管，或者更确切地说是直径为55纳米的大微管，其管壁由约40条原纤维组成。精子尾部还含有两个巨大的线粒体衍生物，在精子发生过程中储存电子致密物质。成熟精子具有扁平的顶体和椭圆形的细胞核。这些巨大精子在到达雌性生殖道时可能为功能性精子（真精子）提供营养，并且/或者它们在精子竞争中发挥作用，填充受精囊。