| Titles |
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English :
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Ultrastructural Study on Spermatozoa
in Some Farm Animals
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| Abstract |
SUMMARY:
The comparative ultrastructure of ejaculated Friesian bull, Water buffalo, Barki ram and Zaraibi goat spermatozoa is studied by transmission electron microscopy. In all the species studied, two main regions could be distinguished in the paddle-shaped head of the sperm:
The head region (containing the nucleus, acrosome, perforatorium, equatorial segment and post-nuclear cap) and the tail region (containing the neck, midpiece, main piece and the end piece). In the present study, some species differences are encountered. The plasma membrane was observed to be thicker in both bull and ram spermatozoa than that in buffalo and goat spermatozoa. The acrosome could be distinguished into an apical segment, a main segment and equatorial segment. The smaller sized apical body in buffalo spermatozoa could be noticed than in other species. The subacrosomal spaces appeared more definable in the ram and the goat spermatozoa than in the bull sperm while the acrosomal dense area was more indistinct. Post-acrosomal dens lamina was found amorphous and moderately electron dense in bull spermatozoa while finely granular in buffalo spermatozoa. The nuclear chromatine was observed less taper anteriorly in buffalo spermatozoa than those in other species. The neck region contained the connecting piece and the centriole. The middle piece consisted of a compact and helically arranged mitochondrial sheath, 9 outer coarse fibers and the axoneme. This axoneme was found to be composed of 9 microtubule doublets surrounding a central pair of singlets. A fibrous sheath was surrounding the axoneme instead of the mitochondrial helix in the principle piece. The termination of the fibrous sheath demarcated the junction of the principle and end pieces.
Key words: Ultrastructural, Spermatozoa, Farm Animal
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| Publication year |
2003
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| Availability location |
معهد بحوث التناسليات الحيوانية - 5 شارع حدائق الأهرام - الهرم - الجيزة
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| Availability number |
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| Organization Name |
Animal Reproduction Research Institute (ARRI)
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| Author(s) from ARC |
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| Agris Categories |
Veterinary science and hygiene - General aspects
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| Proposed Agrovoc |
Ultrastructural, Spermatozoa;
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| Publication Type |
Researsh & Applied Activities
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