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Cytological steps during spermiogenesis in the house sparrow (Passes domesticus, Linnaeus)
(Churchill Livingstone, 2002-08-01)
Spermiogenesis of the domestic sparrow was investigated with the light and electron microscopes and a step by step classification is proposed. Three cell populations corresponding to early, mid and late spermatids were ...
Ultrastructural analysis of the nucleolar aspects at spermiogenesis in triatomines (Heteroptera, Triatominae)
(Pergamon-Elsevier B.V. Ltd, 2010-10-01)
In this study the ultrastructural technique was used to analyze seminiferous tubule cells of the triatomine species Panstrongylus megistus, Rhodnius pallescens and Triatoma infestans. The data obtained provided evidence ...
Targeting and fusion proteins during mammalian spermiogenesis
(Sociedad de Biología de Chile, 2001)
Ultrastructure of spermiogenesis in Plagioscion squamosissimus (Teleostei, Perciformes, Sciaenidae)
(Churchill Livingstone, 1999-12-01)
Spermiogenesis in Plagioscion squamosissimus occurs in cysts. It involves a gradual differentiation process of spermatids that is characterized mainly by chromatin compaction in the nucleus and formation of the flagellum, ...
Spermiogenesis and spermatozoa ultrastructure in Salminus and Brycon, two primitive genera in Characidae (Teleostei : Ostariophysi : Characiformes)
(Wiley-Blackwell, 2006-10-01)
In Salminus, spermiogenesis is cystic and gives origin to a type I aquasperm. Spermatid differentiation is characterized by chromatin condensed into thick fibres, nuclear rotation, nuclear fossa formation, cytoplasmic ...
Spermiogenesis and sperm ultrastructure in Cichla intermedia with some considerations about Labroidei spermatozoa (Teleostei, Perciformes, Cichlidae)
(Churchill Livingstone, 2003-12-01)
Spermiogenesis and spermatozoal structure were studied in Cichla intermedia, a primitive species of Neotropical cichlids. The analysis shows that spermiogenesis is characterized by chromatin compaction, flagellum development, ...
Detection of calcium and calmodulin during spermiogenesis of phytophagous bugs (Hemiptera : Pentatomidae)
(Inst Histol Embriol-conicetMendozaArgentina, 2001)
Spermiogenesis and sperm ultrastructure in Cichla intermedia with some considerations about Labroidei spermatozoa (Teleostei, Perciformes, Cichlidae)
(Churchill LivingstoneEdinburghEscócia, 2003)
Cytological steps during spermiogenesis in the house sparrow (Passes domesticus, Linnaeus)
(Churchill LivingstoneEdinburghEscócia, 2002)
Meiotic nucleolar cycle and chromatoid body formation during the rat (Rattus novergicus) and mouse (Mus musculus) spermiogenesis
(Pergamon-Elsevier B.V. Ltd, 2008-06-01)
The aims of the present study were to follow the nucleolar cycle in spermiogenesis of the laboratory rodents Rattus novergicus and Mus musculus, to verify the relationship between the nucleolar component and chromatoid ...