Ultrastructure of boar testis: spindle shape body of spermatid.

Y Kojima
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引用次数: 3

Abstract

The fine structure of the spindle shape body (SSB) of boar spermatid was studied using testes samples fixed by perfusion. This structure appeared on the middle piece which served as the upper border of the fibrous sheath of principal piece during the transition period between the late acrosome phase to the maturation phase of spermiogenesis. The formation of this thread-like spindle form coincided with the development of the postnuclear sheath with perinuclear ring just prior to the growth of the equatorial segment of the acrosome. Likewise, the ribs of the fibrous sheath on the principal piece were observed to have already formed but have not yet completed the mitochondrial sheath. The total size of the SSB and its consisting microtubule were measured. The functional meaning of this transitory construction may involve a threshold condition on the sperm middle piece.
公猪睾丸超微结构:精细胞梭形体。
采用灌注固定的睾丸标本,对猪精细胞纺锤形体的精细结构进行了研究。在顶体后期到精子发生成熟期的过渡时期,这种结构出现在作为主片纤维鞘上边界的中间片上。这种线状纺锤体的形成与核后鞘和核周环的发育一致,恰好在顶体赤道段生长之前。同样,主片上纤维鞘的肋骨已经形成,但尚未完成线粒体鞘。测定了SSB及其组成微管的总尺寸。这种短暂结构的功能意义可能涉及精子中间部分的阈值条件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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