Quantitative studies on spermatogenesis in buffalo (Bubalus bubalis)

Abstract

Summary. The

Quantitative Aspects of Water Buffalo (Bubalus bubalis) Spermatogenesis.

“…According to our counts, however, about 40% of the expected number of young spermatids disappear during the second meiotic division. BILASPURI and GURAYA (1980) recorded in the same species a 23% cellular degeneration during meiosis II. In total, 63% of all theoretically possible germ cells disappear in buffalo testis during spermatocytogenesis and meiosis.…”

“…cycle, and the last two peaks reflect type B spermatogonial multiplication. HOCHEREAU-DE REVIERS (1970) in cattle andGURAYA (1980) in buffalo have also recorded these four spermatogonial divisions, but besides these, they report two additional peaks during stages 3 and 4 due to divisions of type A 3 and intermediate spermatogonia. Our results reflect an increase of spermatogonia during stage 3 of the cycle but do not reveal an increase in stage 4.…”

“…Our results reflect an increase of spermatogonia during stage 3 of the cycle but do not reveal an increase in stage 4. This means that either heavy degeneration in stage 4 neutralizes numerically a simultaneous multiplication or more likely, that A 3 spermatogonia in the definition of HOCHEREAU-DE REVIERS (1970) and BILASPURI and GURAYA (1980) have differentiated into B spermatogonia without interpolated mitosis. So the spermatogonia multiplication model proposed by ORTAVANT (1954ORTAVANT ( , 1956 for the ram and bull seems to be more appropriate for the buffalo than the model proposed by HoCHEREAU-DE REVIERS (1970) for the bull.…”

Histomorphological and biochemical changes induced by triptolide treatment in male lesser bandicoot rat, Bandicota bengalensis

“…Haematoxylin and eosin (HE) stained sections of testis of all the rats were studied under light microscope for the presence/absence of Sertoli cells and germinal cells and development of cellular associations (the 'stages' and 'phases' of spermatogenesis, which progress through precisely timed and highly organized cycles essential for continuous sperm production) in all the 8 stages of seminiferous epithelial cycle (SEC) in seminiferous tubules as classified with HE method by Bilaspuri and Guraya [27]. Twenty five seminiferous tubules complete in a cross section were selected for analyses.…”

Histochemical localization of enzymes of various metabolic pathways in the testes of buffaloes, goats and rams

“…Glucose-6-phosphate dehydrogenase (G-6-PDH) is an important enzyme of the pentose cycle and its distribution has been studied in the testes of several species (Blackahaw, 1970;Livni & Yaffe, 1974;Saidapur, 1976). Some aspects of testes of buffaloes and goats have been investigated in our laboratory (Guraya & Bilaspuri, 1976;Bilaspuri, 1978;Bilaspuri & Guraya, 1978, 1980a, 6, 1981, 1982, 1983a. The histochemical distribution of the enzymes has been used as important evidence for the intratesticular differences in metabolism, knowledge of which is essential to an understanding of the relationship between metabolic processes and structure and function of the testes (Free, 1970).…”