Formation of the microtubule bundle and helical shaping of the spermatid in the common finch, Lonchura striata var. domestica

Kondo, Teruyoshi; Hasegawa, Kazuo; Uchida, Teruaki

doi:10.1016/s0889-1605(88)80908-x

Cited by 17 publications

(33 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tripepi and Perrotta 77 call it the granular body while Sotelo and Trujillo-Cen oz 22 call it the juxtanuclear body, and G oes and Dolder, 41 the centriolar adjunct. Neither Kondo et al 35 in the swift nor Fawcett et al 9 in the Zebra finch (see Jamieson 55 ) have described this structure. But the chromatoid body and a few other structures are juxtanuclear, and therefore the term, juxtanuclear body, is not specifically descriptive.…”

Section: Spermiogenesis In the Maskedmentioning

confidence: 93%

“…1,4,5,6,8,9,14,15, Most of these publications are, understandably, on the more economic domestic species of birds, such as the domestic fowl, turkey, duck and quail, [21][22][23][24][25]27,29,30,42,[47][48][49][50][51] and even much fewer on other species of birds, including passerines and the Paleognathae. 22,33,35,37,41,42,[44][45][46]49,52 However, most of these publications are based upon individual or fragmentary organelle development 30,[37][38][39][40]45,46 rather than the non-fragmentary method of spatiotemporal, in-tandem, development of the early spermatid in the Japanese quail, 49 in the Turkey, 42 in the House Sparrow, 41 in the parrot, 45 in the Ostrich, 37 in the European nightjar (Caprimulgus europaeus) 52 and in the Emu. …”

Section: An Overview Of Spermiogenesis In Birdsmentioning

confidence: 99%

“…Yet, there are much fewer reports on this process in passerine than in non-passerine birds 9,22,[33][34][35]41,44,77 In this section of the review, spermiogenesis in the Masked Weaver (Ploceus velatus), in which species, some novel unpublished observations on passerine spermiogenesis have been made, will be used as a type passeridan bird for the discussion of this phenomenon in passerine birds.…”

Section: Spermiogenesis In Passerine Birdsmentioning

confidence: 99%

See 2 more Smart Citations

Spermiogenesis in birds

Aire

2014

Spermatogenesis

View full text Add to dashboard Cite

Current knowledge on avian spermiogenesis, including strengths and weaknesses, has been reviewed. Information on avian spermiogenesis considerably lags behind that in mammals because of the paucity of reports in birds. Spermiogenesis in passerine birds has received even much less attention than in non-passerine birds. Mechanisms underlying morphogenesis of the acrosome and nucleus, and roles of microtubular assemblies are poorly understood. The proximal centriole found in non-passerine birds, but hitherto considered to be absent in passerine birds, has recently been described in spermatids and mature spermatozoa of 2 passeridan species, including the Masked weaver for which new and detailed spermiogenetic information is provided in this review. A great deal more studies on spermiogenesis, and spermatogenesis generally, in various avian species are required to considerably enhance knowledge of this phenomenon, contribute to comparative spermatology, provide a basis for appropriate applied studies, and contribute to understanding of phylogeny in this vast order of vertebrates.

show abstract

Section: Spermiogenesis In the Maskedmentioning

confidence: 93%

Section: An Overview Of Spermiogenesis In Birdsmentioning

confidence: 99%

Section: Spermiogenesis In Passerine Birdsmentioning

confidence: 99%

See 1 more Smart Citation

Spermiogenesis in birds

Aire

2014

Spermatogenesis

View full text Add to dashboard Cite

show abstract

“…Cytokeratins have not been immunodemonstrated in the testicular capsule of any of the birds that have been studied, to-date. The early and late series of elongating spermatids, similar to steps 3 to 6 (Góes and Dolder, 2002) (Fawcett et al, 1971;Kondo et al, 1988).…”

Section: Discussionmentioning

confidence: 86%

The cytoskeletal proteins in the contractile tissues of the testis and its excurrent ducts of the passerine bird, Masked Weaver (Ploceus velatus)

2012

View full text Add to dashboard Cite

The cellular composition of the testicular capsule, seminiferous peritubular tissue, the epithelia as well as periductal muscle cell layers of the excurrent ducts was studied, in sexually mature and active Masked Weaver (Ploceus velatus) b i r d s o f t h e p a s s e r i n e f a m i l y , P l o c e i d a e .Ultrastructure of the contractile cells in the testicular capsule, peritubular and periductal tissues showed that these cells were smooth muscles of typical morphological characteristics. Variability in the immunohistochemical co-expression of microfilaments and intermediate filaments in the different tissues was evident. Actin and desmin proteins were co-expressed 2 immunohistochemically in the testicular capsule and seminiferous peritubular smooth muscle layer. Actin was singly and very weakly expressed in the rete testis epithelium while cytokeratins and desmin were co-expressed in the epithelium of the excurrent ducts. The periductal muscle layer of all ducts of the epididymis, the ductus deferens as well as the seminal glomus, strongly co-expressed actin and desmin. Vimentin was absent in all cells and tissue types studied. There is clear evidence that the tissues of the male gonad and its excurrent ducts in the Masked Weaver, as has been reported for members of the Galloanserae and Ratitae, contain well-formed contractile tissues whose function would include the transportation of luminal through-flow from the testis into, and through, its excurrent ducts. The microtubule helix in the head and of the mid-piece, of elongating spermatids, as well as of the mature spermatozoa in the various excurrent ducts, including some spermatozoa in the seminal glomus, also co-expressed these three proteins.

show abstract

“…According to Henley et al (1978), "it is surprising that so little has been done to reveal the ultrastructure of oscine spermatozoa and to study further the arrangement of sperm within the testes". Yet, in the few reports on passerine spermatogenesis and sperm structure, there are a number of reported differences in organelle disposition and interpretation (Fawcett et al 1971;Goés and Dolder 2002;Humphreys 1972;Jamieson et al 2006;Kondo et al 1988;Nicander 1970;Sotelo and Trujillo-Cenóz 1958;Tripepi and Perotta 1991;Yasuzumi 1956;Yasuzumi and Sugioka 1971). The few reports on the development or morphogenesis of the centriolar complex and flagellum of passerine birds have generated variable data and information, and have yielded to considerable speculation.…”

Section: Introductionmentioning

confidence: 99%

Components and development of the centriolar complex during and beyond spermiogenesis in a passeridan bird, the Masked weaver (Ploceus velatus)

Aire

Ozegbe

2012

Tissue and Cell

View full text Add to dashboard Cite

The fate of the proximal centriole in passeridan birds is an area of controversy and relative lack of knowledge in avian spermatogenesis and spermatology. This study examines, for the first time, spatiotemporal changes in the centriolar complex in various phases of spermiogenesis in a passerine bird, the Masked weaver (Ploceus velatus). It also describes the configuration of the centriolar complex and the relationship between it and the granular body in both intra-and extra-testicular spermatozoa. It is shown that the proximal centriole is retained and attaches, at its free end, to the granular body of spermatids in every step of spermiogenesis, as well as in mature intra-testicular and post-testicular spermatozoa, including those in the lumen of the seminal glomus. As the centriolar complex, along with its attached granular body, approaches the nucleus in the early spermatid, the proximal centriole articulates with the distal centriole at an acute angle of about 45⁰, and thereafter, both centrioles, still maintaining this conformation, implant, by means of their articulating proximal ends, at the implantation fossa of the nucleus.In the mature spermatid and spermatozoon, the granular body winds itself helically around the centriolar complex in the neck/midpiece region of the cell, and, thus, becomes the granular 2 helix. The significance of this observation must await future studies, including possible phylogenetic re-evaluation and classification of birds.

show abstract

Formation of the microtubule bundle and helical shaping of the spermatid in the common finch, Lonchura striata var. domestica

Cited by 17 publications

References 15 publications

Spermiogenesis in birds

Spermiogenesis in birds

The cytoskeletal proteins in the contractile tissues of the testis and its excurrent ducts of the passerine bird, Masked Weaver (Ploceus velatus)

Components and development of the centriolar complex during and beyond spermiogenesis in a passeridan bird, the Masked weaver (Ploceus velatus)

Contact Info

Product

Resources

About