Ultrastructural Characteristics of Monkey Spermatogonia and Preleptotene Spermatocytes

Publisher Website
Google Scholar
Abstract
With the aim of defining distinctive morphological characteristics of spermatogonia and preleptotene spermatocytes in monkey [Macaca mulatta and M. arctoides] light microscopic and EM observations on adjacent thick and thin sections were correlated. On the basis of their ultrastructure it is possible to distinguish preleptotene spermatocytes (PL), dark type A (Ad), pale type A (Ap) and type B spermatogonia (B). The criteria used for the identification include their cellular and nuclear sizes, the shape of the cells, the amount of organelles and especially, the nuclear staining characteristics and chromatin patterns. Type A dark spermatogonia possess an oblong nucleus containing a deeply stained chromatin in contrast with the pale nuclei which stain very lightly. The staining pattern of some of the type A appears intermediate. They could all not be categorized into Ad or Ap. The type B spermatogonia are round cells with an increased amount of heterochromatin close to the nuclear envelope. Preleptotene spermatocytes are smaller both in cellular and in nuclear diameter than the type B spermatogonia and their nucleoplasm consists of irregular patches of condensed chromatin.

This publication has 0 references indexed in Scilit: