Levron Céline, Ternengo Sonia, Marchand Bernard
Laboratoire Parasites et Ecosystèmes Méditerranéens, Faculté des Sciences et Techniques, Université de Corse, Campus Grossetti, 20250 Corte, France.
Parasitol Res. 2004 Sep;94(2):147-54. doi: 10.1007/s00436-004-1199-0.
This paper constitutes the first ultrastructural study of spermiogenesis and the spermatozoon of a Digenea belonging to the family Zoogonidae, Diphterostomum brusinae. Spermiogenesis follows the general pattern found in the digeneans. It begins with the formation of a differentiation zone in the spermatid. The two centrioles give rise to flagella. These two flagella undergo a rotation of 90 degrees and fuse with the median cytoplasmic process. The proximo-distal fusion occurs at the level of attachment zones. The mature spermatozoon of D. brusinae presents all the features found in the digeneans gametes: two axonemes, mitochondrion, nucleus and two bundles of parallel cortical microtubules. Nevertheless, several characteristics distinguish the spermatozoon of D. brusinae from other digeneans, in particular the external ornamentations of the plasma membrane and the anterior and posterior extremities. The description of the ultrastructural features of reproduction in this species would contribute to the understanding of the phylogenetic relationships in the Zoogonidae family.
本文是对属于 Zoogonidae 科的双腔吸虫 Diphterostomum brusinae 的精子发生和精子进行的首次超微结构研究。精子发生遵循双腔吸虫中发现的一般模式。它始于精细胞中分化区的形成。两个中心粒产生鞭毛。这两个鞭毛进行 90 度旋转并与中间细胞质突起融合。近端到远端的融合发生在附着区水平。D. brusinae 的成熟精子具有双腔吸虫配子中发现的所有特征：两个轴丝、线粒体、细胞核和两束平行的皮质微管。然而，几个特征将 D. brusinae 的精子与其他双腔吸虫区分开来，特别是质膜以及前后端的外部装饰。对该物种生殖超微结构特征的描述将有助于理解 Zoogonidae 科中的系统发育关系。
