Germ cell Differentiation During Spermatogenesis, and Ultrastructural Characteristics of Mature Sperm in Male Phacosoma japonicus (Bivalvia: Veneridae)
نویسندگان
چکیده
منابع مشابه
Ultrastructural Characteristics of the Testis, Spermatogenesis and Taxonomic Values of Sperm Morphology in Male Ruditapes philippinarum in Western Korea
Ultrastructural characteristics of the germ cells and accessory cells in testis during spermatogenesis and taxonomic values of mature sperm morphology of Ruditapes philippinarum were investigated by the transmission electron microscope and scanning electron microscope observations. The testis is the diffuse organ that consists of branching acini containing developing germ cells and accessory ce...
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In all species, reproductive function depends on the ability of the individual to produce functional differentiated gametes. Spermatogenesis is a cyclic process in which diploid spermatogonia differentiate into mature haploid spermatozoa. Thus from a genetic point of view, spermatogenesis can be divided into two phases, namely the diploid and haploid phase. Indeed, this complex differentiation ...
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Rises of intracellular Ca2+ ([Ca2+]i) are key signals for cell division, differentiation, and maturation. Similarly, they are likely to be important for the unique processes of meiosis and spermatogenesis, carried out exclusively by male germ cells. In addition, elevations of [Ca2+]i and intracellular pH (pHi) in mature sperm trigger at least two events obligatory for fertilization: capacitatio...
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Riboflavin carrier protein (RCP) is a phosphoglycoprotein (37 kDa) that is well studied in chicken. An immunologically cross-reacting protein was identified in mammals and active immunization of male rats and bonnet monkeys with chicken RCP lead to an approximately 80% reduction in fertility. However, the physiological mechanism responsible for inhibition of male fertility has not been investig...
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In vivo spermatogenesis of man has been thoroughly investigated recently by Heller and Clermont (1964). On the other hand, in vitro cultures of mammalian germ-cells have remained rather insufficient up to now, and the techniques currently available can hardly be used by those who are interested in genetic and endocrinologic problems of the testis. Under such a situation, efforts for successful ...
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ژورنال
عنوان ژورنال: The Korean Journal of Malacology
سال: 2011
ISSN: 1225-3480
DOI: 10.9710/kjm.2011.27.1.055