WROBEL, KH and PAWAR, HS (1992) QUANTITATIVE MORPHOLOGY OF THE TESTICULAR TUBULAR EPITHELIUM IN THE WATER-BUFFALO (BUBALUS-BUBALIS). ANDROLOGIA, 24 (2). pp. 63-68. ISSN 0303-4569,
Full text not available from this repository.Abstract
Ultrastructural features and morphometric evaluations of water buffalo seminiferous epithelium are reported for the 6 phases of the spermatogenic cycle. The relative Sertoli cell volume varies between 30% (phase 4) and 39% (phase 8), the calculated volume of a Sertoli cell between 7118-mu-m3 and 8968-mu-m3 (phase 4). Smooth ER is the organelle that exhibits the most prominent changes in Sertoli cells during the spermatogenic cycle: it occupies about 6% in phase 3 and 21% in phase 4. All spermatogenic cells of the same clone present cytoplasmic bridges among them. From preleptotene (about 470-mu-m3) to late diplotene (about 2300-mu-m3) the volume of a primary spermatocyte increases nearly 5-fold; their nuclear volumes increase 3.5-fold in the same period. Secondary spermatocytes are found only in phase 4 of the cycle. Due to partial cell necrosis and autolysis late maturation phase spermatids display not more than 25% of the size of early cap phase spermatids. 63% of all numerically possible germ cells disappear from the seminiferous epithelium during spermatogenesis. Particularly heavy cell loss is observed in phase 4 and involves the spermatogonial fraction as well as cells during the second meiotic division.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SERTOLI-CELL; TESTIS; SPERMATOGENESIS; CYCLE; BULL; TESTIS; SPERMATOGENESIS; SERTOLI CELL; MORPHOMETRY; WATER BUFFALO |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/54612 |
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