Spermiogenesis and the spermatozoon ultrastructure of Robphildollfusium fractum (Digenea: Gyliauchenidae), an intestinal parasite of Sarpa salpa (Pisces: Teleostei)
Spermiogenesis and the spermatozoon ultrastructure of Robphildollfusium fractum (Digenea: Gyliauchenidae), an intestinal parasite of Sarpa salpa (Pisces: Teleostei)
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DOI：
10.1016/j.crvi.2012.06.003
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发表时间：
2012-07-01
影响因子：
2
通讯作者：
Miguel, Jordi
中科院分区：
文献类型：
--
作者：
Bakhoum, Abdoulaye J. S.;Sene, Aminata;Miguel, Jordi
刺梨的精子发生始于一个分化带的形成，该分化带包括：两个中心粒，每个中心粒带有条纹根状突起、核、几个线粒体和一个由7个电子致密层组成的中心粒间体。两个中心粒起源于两个游离鞭毛，它们垂直于细胞质正中突起生长。随后，游离鞭毛旋转并与正中的细胞质突起进行近端融合。核和线粒体的迁移发生在这种近端融合之前。最后，年轻精子在弓形膜环收缩后从残留的细胞质中分离出来。裂殖吸虫精子有两个长度不同的9+1‘’型轴丝，核、两个线粒体、两束平行的皮质微管、质膜外部纹饰、棘状小体和糖原颗粒。此外，一个不到达核区的较短的轴丝，在精子前肢中存在电子致密物质，以及两个精子末端的形态特征，是裂纹藻成熟精子的特征。(C)2012年，由埃尔塞维尔·马森公司代表科学院出版。
Spermiogenesis in Robphildollfusium fractum begins with the formation of a differentiation zone containing: two centrioles, each bearing striated rootlets, nucleus, several mitochondria and an intercentriolar body constituted by seven electron-dense layers. The two centrioles originate two free flagella growing orthogonally to the median cytoplasmic process. Later, the free flagella rotate and undergo proximodistal fusion with the median cytoplasmic process. Nuclear and mitochondrial migrations occur before this proximodistal fusion. Finally, the young spermatozoon detaches from the residual cytoplasm after the constriction of the ring of arched membranes. The spermatozoon of R. fractum exhibits two axonemes of different length of the 9 + '1' trepaxonematan pattern, nucleus, two mitochondria, two bundles of parallel cortical microtubules, external ornamentation of the plasma membrane, spine-like bodies and granules of glycogen. Additionally, a shorter axoneme, which does not reach the nuclear region, the presence of an electron-dense material in the anterior spermatozoon extremity and the morphologies of both spermatozoon extremities characterize the mature sperm of R. fractum. (c) 2012 Published by Elsevier Masson SAS on behalf of Academie des sciences.