Ultrastructure of germ cells, the Leydig cells, and Sertoli cells during spermatogenesis in Boleophthalmus pectinirostris (Teleostei, Perciformes, Gobiidae)

Tissue & Cell
Ee-Yung Chung

Abstract

The ultrastructures of germ cells, Leydig cells, and Sertoli cells during spermatogenesis in male Boleophthalmus pectinirostris were investigated by electron microscopic observations. During the period of maturation divisions, well-developed Leydig cells have three major morphological characteristics: a vesicular nucleus, mitochondria with tubular cristae, and a number of smooth endoplasmic reticulum. Based on cytoplasmic features, it appears that Leydig cells are responsible for the synthesis of male sex steroids. Although no clear evidence of steroidogenesis was found in the Sertoli cells, they were found to perform a phagocytic function in the seminiferous lobules. Most Sertoli cells contain granules thought to represent deposited glycogen or lipid but there is no indication of a transfer of nutrients to the spermatids. During the period of germ cell degeneration, several characteristics of phagocytosis appear in the cytoplasm of the Sertoli cells. In particular, it is assumed that the Sertoli cells are involved in the degeneration and resorption of undischarged spermatids after spermiation. No acrosome of the sperm is formed. The structure of the spermatozoon in B. pectinirostris is very similar and closely resembles to tho...Continue Reading

References

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Citations

May 9, 2014·Micron : the International Research and Review Journal for Microscopy·Mônica CasselMahmoud Mehanna
Apr 27, 2013·Micron : the International Research and Review Journal for Microscopy·Liguang ShiRujie Yang
Nov 27, 2009·The Journal of Veterinary Medical Science·Ryohei IchimuraKunitoshi Mitsumori
May 17, 2011·Micron : the International Research and Review Journal for Microscopy·Alban FrancoClothilde Heude Berthelin
Mar 30, 2016·Protoplasma·Alexander V Kalachev, Olga V Yurchenko
Mar 8, 2018·Fish Physiology and Biochemistry·Yong-Qiang ZhaoJun-Quan Zhu
Oct 24, 2018·Environmental Science and Pollution Research International·Pan GongYubang Wang

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