Spermatozoal ultrastructure of four Sparidae fishes: Acanthopagrus berda, Acanthopagrus australis, Lagodon rhomboids and Archosargus probatocephus

Gwo, Jin‐Chywan; Chiu, J.-Y; Lin, Ching Yu; Su, Ying; Yu, Shyi-Liang

doi:10.1016/j.tice.2004.11.003

Cited by 17 publications

(12 citation statements)

References 24 publications

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“…Mature sperm chromatin condenses around the centriole, having a relatively homogenous appearance. The volume of the nucleus is finally completely reduced and acquires the shape typical of Sparidae sperm nuclei (Gwo and Gwo, '93;Gwo et al, 2005). The nuclear volume of gonadal spermatozoa is approximately one-eighth that of the early spermatid nucleus.…”

Section: Chromatin Condensation Pattern During Spermiogenesismentioning

confidence: 99%

Spermiogenic nuclear protein transitions and chromatin condensation. Proposal for an ancestral model of nuclear spermiogenesis

et al. 2009

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We have chosen three species (Sparus aurata, Dicentrarchus labrax, and Monodonta turbinata) that represent different transition patterns in the composition and structure of spermiogenic nuclei. The transition patterns of these species are representative of spermiogenesis in a large number of animal species. We analyze: (a) nuclear protein exchange; (b) chromatin condensation pattern; and (c) histone acetylation during spermiogenic development. In the simplest spermiogenesis histones and nucleosomes remain in mature sperm. Chromatin of spermatids is organized into 20 nm granules, simultaneous with a nuclear volume reduction. The granules coalesce in the final stage of spermiogenesis. Granular chromatin is correlated with acetylation of histones H3 and H4, whereas final coalescence is associated with histone deacetylation. We also studied two other spermiogenesis where a basic protein substitutes histones. Each species has a very different substituting protein. One has a typical protamine of 34 amino acids; the other has a sperm nuclear basic proteins (SNBP) of 106 amino acids. In both, the structural transitions and histone acetylation pattern are similar: in early spermiogenesis chromatin is organized into 20 nm granules, and histones are significantly acetylated, while the nuclear volume decreases. Subsequently, acetylated histones are displaced by the protamine or SNBP. Histone substitution causes chromatin remodelling and additional reduction in nuclear volume. We analyze these three cases together with earlier works and propose that the formation of 20 nm granules containing acetylated H3 and H4 accomplishes the minimum functional requirement to be considered the most evolutionarily ancestral chromatin conformation preceding condensation in animal spermiogenesis.

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Section: Chromatin Condensation Pattern During Spermiogenesismentioning

confidence: 99%

Spermiogenic nuclear protein transitions and chromatin condensation. Proposal for an ancestral model of nuclear spermiogenesis

et al. 2009

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“…Mitochondria are responsible for ATP production, the main source of energy for flagellar movement in externally fertilizing fish species (Christen et al, 1987;Cosson et al, 1999). Structure such as necklace, found in the spermatozoa of R. sarba, has also been reported in other species of Sparidae P.major ( Hara and Okiyama ,1998 ;Gwo et al , 2004a ) A. australis, A. berda (Gwo et al, 2005), P. major, (Gwo et al, 2004a) , A. latus (Gwo, 1995) and P. bogaraveo (Maricchiolo et al, 2010) but never been observed in sparids from the Western hemisphere (Gwo et al, 2005).…”

Section: Discussionmentioning

confidence: 62%

“…Generally in the sparids, this structure can be seen, in the nucleus, at the level of the proximal centriole (Gwo et al, 2004a(Gwo et al, , 2005Maricchiolo et al, 2007). On the other hand, the nuclear notch in R. sarba sperm is located above the proximal centriole.…”

Section: Discussionmentioning

confidence: 96%

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Ultrastructure features of spermiogenesis and spermatozoa of sparid fish Rhabdosargus sarba (Forsskål, 1775) from Red SEA, Jeddah coast

Moharram¹,

Qari²,

El-Aweedy³

2014

IOSRJPBS

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“…Most of the marine bivalve mollusk spermatozoa are aquasperm, with a slightly curved or round or shortrodnucleus, a kind of species special acrosome (usually of conical shape), the midpiece consisting of one to six spherical mitochondria (four to five generally, such as Scapharca broughtoni, Figures 6 and 7) arranged in a circle that are surrounding a pair of centriole or a single large mitochondrion derived from fusion of several mitochondria, and a classical "9 + 2" flagellum [24,[26][27][28][29][30][31]. Some cephalopod spermatozoa have a characteristic acrosome with periodic and conical bands, and the mitochondrial number ranges from 9 to 11 in the midpiece, exemplified by Octopus tankahkeei [32][33][34][35] (Figures 8 and 9).…”

Section: Introductionmentioning

confidence: 99%

Mitochondria: transportation, distribution and function during spermiogenesis

Sun¹,

Yang²

2010

ABB

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Spermiogenesis is a dynamic process which includes organelle reorganization and new structure formation. The morphology and distribution of the mitochondria in germ cells change to accommodate the cellular requirement. Multiple molecular motors and related proteins participate in carrying and anchoring mitochondria to the midpiece during spermiogenesis and this process is regulated precisely. Energetic metabolism provides energy for cellular activity and influences sperm survival and motility directly. Ubiquitination of mitochondria takes place during spermiogenesis, which has been implicated in sperm quality control and mitochondrial inheritance. In light of the essential roles of mitochondria in energy production, calcium homeostasis and apoptosis, mitochondria dysfunction cause severe human diseases, such as male infertility. The present study paves a way for a more detailed exploration of the biology of mitochondria during spermiogenesis

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Spermatozoal ultrastructure of four Sparidae fishes: Acanthopagrus berda, Acanthopagrus australis, Lagodon rhomboids and Archosargus probatocephus

Cited by 17 publications

References 24 publications

Spermiogenic nuclear protein transitions and chromatin condensation. Proposal for an ancestral model of nuclear spermiogenesis

Spermiogenic nuclear protein transitions and chromatin condensation. Proposal for an ancestral model of nuclear spermiogenesis

Ultrastructure features of spermiogenesis and spermatozoa of sparid fish Rhabdosargus sarba (Forsskål, 1775) from Red SEA, Jeddah coast

Mitochondria: transportation, distribution and function during spermiogenesis

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