Morphological Changes of Mammalian Nucleoli during Spermatogenesis and Their Possible Role in the Chromatoid Body Assembling

Figure 3

Germ cells of Oryctolagus cuniculus. Silver ion impregnation (AgNOR). (a) Interphasic spermatogonia with organized nucleolus (arrow). (b) Primary spermatocyte in zygotene stage possessing central and peripheral nucleolar corpuscles (arrows). (c) Primary spermatocyte in pachytene possessing nucleolar corpucles mainly in the peripheral chromosomal region (arrow). (d) Metaphase I. (e) Round and elongated spermatids general view. (f) Elongated spermatids possessing peripheral nucleolar corpuscles (arrows). (g) Spermatozoon with a strong silver ion impregnation in the mitochondrial sheath region. Bars (a, b, c, d, f, and g) 5 μm; (e) 20 μm.

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