Spermatogenesis

Courot, M.; Reviers, Marie-Thérèse HOCHEREAU-de; Ortavant, R.

doi:10.1016/b978-0-12-386601-1.50012-3

Cited by 112 publications

(107 citation statements)

References 244 publications

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“…The changes in Feulgen DNA values of male germ cells of the vole are essentially the same as those described already for the bull, the ram and the rabbit Bouters et al, 1967a, b ;Courot et al, 1970 ;Esnault and Nicolle, 1976). The decline in Feulgen DNA from primary spermatocytes, through secondary spermatocytes to round spermatids corresponds with the accepted changes in ploidy which occur during these stages of germ cell maturation.…”

Section: Introductionsupporting

confidence: 82%

“…The decline in Feulgen DNA from primary spermatocytes, through secondary spermatocytes to round spermatids corresponds with the accepted changes in ploidy which occur during these stages of germ cell maturation. The increased Feulgen DNA value seen in elongated spermatids has its counterpart in the bull and sheep, in which the increase is seen in elongating rather than elongated spermatids (Courot et al, 1970). Assuming that the processes involved in spermatogenesis of the vole are similar to those in other species, the augmentation of the Feulgen DNA value in elongated spermatids could reflect enhanced staining of the deoxyribose by the leucofuchsin because of greater accessibility of the DNA (Sibatani, 1953 ;Noeske, 1971).…”

Section: Introductionmentioning

confidence: 87%

“…In the development of spermatids into mature spermatozoa (such as those in the vas deferens or in an ejaculate), it has been shown in these 3 species that there is no further change in the U-V DNA, whereas there is a statistically significant additional decline in the Feulgen DNA Bouters et al, 1967a, b ;Courot et al, 1970 ;Esnault and Nicolle, 1976 (Esnault et al, 1964). Testis (Grocock and Clarke, 1974 There is a highly significant decline in mean nuclear area from primary to secondary spermatocytes, from round to elongated spermatids, and from elongated spermatids to testicular spermatozoa (P < 0.001).…”

Section: Introductionmentioning

confidence: 99%

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Feulgen-DNA changes in the germ cells of the male vole (Microtus agrestis) during their development

Clarke¹,

Esnault²,

Nicolle³

1980

Reprod. Nutr. Dévelop.

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Section: Introductionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Feulgen-DNA changes in the germ cells of the male vole (Microtus agrestis) during their development

Clarke¹,

Esnault²,

Nicolle³

1980

Reprod. Nutr. Dévelop.

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“…Later the cyst cell will form the envelope to the cyst formed by the spermatogonia mitotic division. Within the cyst the secondary spermatogonia undergo a series of sucessive synchronous mitotic division during the multiplication period, and arise the constant, species specific, numbers cystocytes (TIHEN, 1946;COOPER, 1950;HANNAH-ALAVA, 1965;MEYER, 1968;COUROT et al, 1970;KUROKAWA & HIHARA, 1976;LINDSLEY & TOKUYASU, 1980;OGUMA & KUROKAWA, 1984), which after meiosis will originate the spermatids, and finally the spermatozoa.…”

Section: Introductionmentioning

confidence: 99%

Organization of the cysts in bee (Hymenoptera, Apidae) testis: number of spermatozoa per cyst

Cruz-Landim

2001

Iheringia, Sér. Zool.

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The morphology of the cyst cells in Apis mellifera Linné, 1758, Scaptotrigona postica Latreille, 1804, and Melipona bicolor bicolor Lepeletier, 1836 testis, as well as the average number of spermatic cells are reported. The data indicates a supporting and nourrishing role of the cyst cells to the developing cystocytes. The counts of immature spermatozoa in the cysts show an average of 202.8 ± 21.2 spermatozoa for A. mellifera, 117.4 ± 8.68 for S. postica and 88.8 ± 15.57 for M. bicolor, which predict the occurrence of 8 mitotic cycles in the cystocytes of A. mellifera and 7 in the meliponines, considering that only one spermatozoom originates of each final spermatogonium.

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“…The general cytological characteristics of these cells as nuclear and cytoplasmic forms are reviewed by (Courot et al, 1970;Martins, 1993;Martins & Silva, 2001). …”

Section: Introductionmentioning

confidence: 99%

Morphological Aspects of Spermatogenic Cells at Different Stages of Sexual Maturation in Black Isogenic C57BL/6/Uni Mice

et al. 2012

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SUMMARY:In order to study the morphological changes that occur in cells of the testes of isogenic black mouse C57BL/6/Uni into three periods during spermatogenetic used 15 mice divided into 3 groups of 5 animals with 40, 50 and 60 days of age. The mice were sacrificed and weighed. Then weighed and measured the testicles, to be processed finalmete histologically and stained with HE, PAS and Masson Massom-H and evaluated under light microscopy. Was observed in group I with 40 days of age in the seminiferous tubules had a lumen with sparse small amount of interstitial tubular cells. In the seminiferous epithelium were identified type A spermatogonia, intermediate and B, which occupied the compartment adbasal and intermingled with these cells was observed in spermatocytes I in Pachytene and leptotene, whereas in the adluminal compartment Golgi phase spermatids observed in the presence of acrosomal granule. In group II, the cells of the seminiferous epithelium were developed and it was observed in round spermatids cephalic hood phase plus many elongated spermatids in acrosome phase and Sertoli cells. In Group III, 60 days old, it was found that the seminiferous epithelium which was of the tubules had elongated spermatids in acrosome phase and maturation, with elongated nuclei and acrosomal system typical of spermiation in the presence of sperm and residual bodies near the tubular lumen. So you can check the morphological evolution of germ cell testicular spermatids and recognize its four phases: Golgi, cap, acrosome and maturation over the age of the animal.

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Spermatogenesis

Cited by 112 publications

References 244 publications

Feulgen-DNA changes in the germ cells of the male vole (Microtus agrestis) during their development

Feulgen-DNA changes in the germ cells of the male vole (Microtus agrestis) during their development

Organization of the cysts in bee (Hymenoptera, Apidae) testis: number of spermatozoa per cyst

Morphological Aspects of Spermatogenic Cells at Different Stages of Sexual Maturation in Black Isogenic C57BL/6/Uni Mice

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