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Imaging Centrosomes in Fly Testes
Published on: September 21, 2013
Centriolar length variability in testicular cells from side-necked turtles
D W Hale1, B G Hanks, J W Bickham
1Department of Biology, Texas A&M University, College Station 77843.
Journal of Submicroscopic Cytology and Pathology
|January 1, 1989
Summary
Centrioles were found in turtle testicular cells, with significantly enlarged centrioles in spermatocytes and spermatids. These enlarged centrioles appear to replicate only once during sperm development.
Area of Science:
- Reproductive Biology
- Cell Biology
- Herpetology
Background:
- Centrioles are crucial microtubule-organizing centers in eukaryotic cells.
- Their presence and morphology during gametogenesis in reptiles remain incompletely understood.
Purpose of the Study:
- To investigate the presence and morphology of centrioles in the testicular cells of side-necked turtles.
- To describe centriole behavior during spermatogenesis in this species.
Main Methods:
- Silver nitrate staining was employed on surface-spread testicular material.
- Light microscopy was used to examine centriole structure and association with cellular nuclei.
Main Results:
- Centrioles were identified in Sertoli cells, spermatogonia, primary spermatocytes, and spermatids.
- Sertoli cell centrioles were minute, similar to somatic cells.
- Primary spermatocytes and spermatids displayed greatly enlarged centrioles (4-5 microns).
- Centriole replication appeared limited to prophase I of meiosis.
Conclusions:
- Side-necked turtles exhibit unique, enlarged centrioles in developing sperm cells.
- Centriole duplication is tightly regulated during turtle spermatogenesis, occurring only once.
- These findings contribute to understanding centriole evolution and function in male germline development.
