Spermiogenesis and spermatozoon ultrastructure of the cranial digenean Troglotrema acutum (Leuckart, 1842)
Spermiogenesis and spermatozoon ultrastructure of the cranial digenean Troglotrema acutum (Leuckart, 1842)
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DOI：
10.1645/ge-743r.1
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发表时间：
2006-06-01
影响因子：
1.3
通讯作者：
Torres, Jordi
中科院分区：
文献类型：
--
作者：
Miquel, Jordi;Fournier-Chambrillon, Christine;Torres, Jordi
利用透射电镜技术描述了尖形穴居草精子发生的超微结构和成熟精子的培养特征。标本取自美国水貂（Mustela vison）的鼻泪窦。 T acutum 的精子发生遵循双殖系的一般模式。分化区是一个圆锥形区域，以皮质微管为边界，并在其底部由拱形膜环界定。脓区包含2个与横纹细根相关的中心粒以及它们之间的中心粒间体。中心粒发育出 2 个游离鞭毛，与中位细胞质突起正交生长。后鞭毛旋转和游离鞭毛与正中胞质突的近远融合起源于精子。 T. acutum 成熟精子的特征是存在 2 个不同长度的轴丝，呈现 9+1 trepaxonematan 模式。 2束平行的皮质微管，2个线粒体，一个细胞核。糖原和颗粒将这些超微结构特征与先前研究的其他双殖动物物种进行比较，并讨论了不同精子学特征的重要性。
Ultrastructure of spermiogenesis and the Train characters of the Mature Spermatozoon of Troglotrema acutum are described by means of transmission electron microscopy. Specimens were obtained front the nasolacrimal sinuses of an American mink (Mustela vison). Spermiogenesis in T acutum follows the general pattern of digeneans. The zone of differentiation is a conical-shaped area bordered by cortical microtubules and delimited at its base by it ring of arched membrane. Pus area contains 2 centrioles associated with striated rootlets and in intercentriolar body between them. The centriole develop 2 free flagella that grow ortogonally to the median cytoplasmic process. The posterior flagellar rotation and proximodistal fusion of the free flagella with the median cytoplasmic process originate the spermatozoon. The mature spermatozoon of T. acutum is characterized by the presence of 2 axonemes of different lengths presenting the 9+1 trepaxonematan pattern. 2 bundles of parallel cortical microtubules, 2 mitochondria, a nucleus. and granules Of glycogen These ultrastructural characters are compared with other digenean species previously studied and the importance of different spermatological features is discussed.