Miquel Jordi, Swiderski Zdzisław, Neifar Lassad, Eira Catarina
Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, E-08028 Barcelona, Spain.
J Parasitol. 2007 Dec;93(6):1296-302. doi: 10.1645/GE-1193.1.
The ultrastructural organization of the mature spermatozoon of the trypanorhynch cestode Parachristianella trygonis is described by transmission electron microscopy. The spermatozoon is a long and filiform cell, tapered at both ends, lacking both mitochondrion and crested bodies. Its cytoplasm contains 2 axonemes of the 9+'1' pattern of the Trepaxonemata longitudinally displaced, parallel cortical microtubules, the nucleus and glycogen in form of both alpha-glycogen rosettes and beta-glycogen particles. The anterior extremity of the spermatozoon is characterized by the presence of an arclike row of up to 10 parallel cortical microtubules that partially surround the first axoneme. The present study emphasizes the ultrastructural similarity between mature spermatozoa of all 4 trypanorhynchs that have been studied to date. Nevertheless, several features, i.e., the characteristics of spermatozoa extremities, the absence of crested bodies, and the possible presence of an arclike layer of cortical microtubules, need a more thorough analysis or confirmation in some of these species.
利用透射电子显微镜描述了锥吻绦虫拟克里斯蒂绦虫成熟精子的超微结构组织。精子是一个细长的丝状细胞，两端逐渐变细，既没有线粒体也没有嵴体。其细胞质包含2条具有9 + '1'模式的轴丝，属于纵行排列的三鞭毛目，还有平行的皮质微管、细胞核以及α -糖原玫瑰花结和β -糖原颗粒形式的糖原。精子的前端特征是存在一排多达10条平行的皮质微管，它们部分环绕着第一条轴丝。本研究强调了迄今为止已研究的所有4种锥吻绦虫成熟精子之间的超微结构相似性。然而，一些特征，即精子末端的特征、嵴体的缺失以及皮质微管可能存在的弧形层，在其中一些物种中需要更深入的分析或证实。
