Gonads in Histiostoma mites (Acariformes: Astigmata): Structure and development

Witaliński, Wojciech; Rożej-Pabijan, Elżbieta; Podkowa, Dagmara

doi:10.1016/j.asd.2014.04.006

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…We did not observe synaptonemal complexes in nuclei of the earliest germinal cells, suggesting that oogonia entering the meiotic prophase occur in the earlier instar, and in adult females nutritive cellconnected germinal cells are previtellogenic oocytes. This matches observations on gonad development in Histiostoma in which meiotic divisions were completed in the tritonymph, thus before the final molt to adult female (Witaliński et al 2014). However, in some species such as Sancassania berlesei, the meiotic division is completed much later, in vitellogenic oocytes passing through the middle part of the oviduct (Walzl et al 2004).…”

Section: Discussionsupporting

confidence: 81%

“…Thus, the testicular central cell seems to be functional in developing testis, but later, it can either remain within the germarium or may deteriorate. The central cell was not observed in the testis of the studied species as in many other Astigmata (Walzl 1992;Witaliński and Walzl 1995;Florek and Witaliński 2010a), although it is present in some species (Prasse 1968;Baker and Krantz 1985;Witaliński et al 1990;Florek and Witaliński 2010a;Witaliński et al 2014). A role for the germarium and testicular central cell in suppressing spermatogonia development has been postulated (for further details see: Witaliński 2014).…”

Section: Discussionmentioning

confidence: 82%

“…Within the germarium, a conspicuous, so-called testicular central cell may be present. The central cell belongs to the germinal line and in developing gonads is connected to the earliest spermatogonia via tubular intercellular bridges, which later disappear (Witaliński et al 2014).…”

Section: Discussionmentioning

confidence: 99%

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Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees

Rożej-Pabijan

Witaliński

2018

Acarologia

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Chaetodactylus osmiae (Dufour, 1839) is a mite parasitizing the solitary bee - Osmia rufa L.- used as a commercial pollinator. In this study we present the anatomy of female and male reproductive systems of this species as well as its gonadal structure and gametogenesis at the ultrastructural level. The reproductive systems are similar to those of other Astigmata. The ovaries are paired and each contains germ-line cells – a giant nutritive ovarian cell connected via funnel-type intercellular bridges to oogonia and previtellogenic oocytes. Germinal cells are embedded in several large somatic stroma cells. Remarkable numerous protrusions of the nutritive ovarian cell penetrate into the stroma cell cytoplasm. Conspicuous ER cisterns run close and parallel to the surface of the germinal cells. Oocytes entering vitellogenesis disassociate with the nutritive cell and a vitelline envelope composed of heterogeneous material appears on their surface. When vitellogenesis is completed, the oocytes are full of lipid droplets and two types of yolk spheres; the vitelline envelope transforms into a thin and homogeneous chorion.Paired testes are located on one side of the body, whereas the opposite side is filled by a male accessory gland. In testis, germinal cells are embedded in a few somatic stroma cells. The earliest spermatogonia form a compact germarium, whereas later stages are dispersed randomly within the testis. Spermatocytes are characterized by a superficial spongy layer, formation of mitochondrial derivatives, loss of nuclear envelope and condensation of chromatin in threads. A single electron-dense lamella appears during the spermatid stage, separating chromatin threads from a large spongy body surrounded by arcuate, double-membrane bounded cisterns. In spermatids, the superficial spongy layer is absent. The testicular central cell in the germarium and structures related to meiotic division were not observed in the testes. Spermatozoa are multiform cells (approx. 4x11µm) containing electron-dense lamella (ca. 45 nm thick) surrounded by mitochondrial derivatives which separate chromatin threads 45-50 nm thick from remnants of the spongy body i.e. arcuate cistern profiles. Spermatozoa deposited in female spermatheca are more electron dense; the electron-dense lamella is deeply folded several times, whereas chromatin threads are present in the center of the spermatozoon and are either flanked by lamella folds or located more peripherally under the plasmalemma. Remnants of the spongy body are not discernible.

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 82%

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Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees

Rożej-Pabijan

Witaliński

2018

Acarologia

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“…privorai, Histiostoma brevipodum Sardinia -Probonomoia opuntiae Norway -Conglanoetus denticulatus Poland (Chmielewski, 1984;Michalski & Ratajczak, 1989;Witaliński, Rożej-Pabijan & Podkowa, 2014) -Histiostoma crypturgi, H. ovalis, H. piceae, H. polypori, Spinanoetus pelznerae, S. weingaertnerae, Probonomoia pini, P. spinifera, Portugal (cont.) (Vissa et al, 2019) -Histiostoma ovatus Romania (Cooreman, 1941;, 1977b Xenanoetus vestigialis Russia (all, continent.)…”

Section: Europementioning

confidence: 99%

Acarorum Catalogus Ix

Beron¹

2021

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“…Zespoły takie znajdziemy m.in. u osłonicy Oikopleura dioica [79], niesporczaków Milnesium tardigradum [80] i Halechiniscus perfectus [81], czy u drapieżnych roztoczy (Astigmata) [82][83][84][85]. Pomimo tego, że zespoły takie znacząco się od siebie różnią pod względem morfologicznym, ich wspólną cechą jest obecność części syncytialnej, do której przyłączone są rozwijające się oocyty.…”

Section: Zespoły O Innej Organizacjiunclassified

Zespoły komórek płciowych w gametogenezie zwierząt - geneza, organizacja i funkcjonowanie

Świątek

Urbisz

2021

Postepy Biochem

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W takcie wczesnej gametogenezy zwierząt pojawiają się nietypowe podziały mitotyczne komórek płciowych, które nie kończą się pełną cytokinezą. W konsekwencji potomne komórki nie są kompletnie rozdzielone ale pozostają przez pewien czas połączone zmodyfikowanymi pierścieniami zaciskowymi zwanymi stabilnymi mostkami międzykomórkowymi. Mostki te to na tyle szerokie pasma cytoplazmy (od 0,2µm do 20µm), że możliwa jest wymiana zarówno produktów genowych jak i organelli pomiędzy połączonymi komórkami. Takie syncytialne twory nazywamy zespołami (cystami) komórek płciowych. Zespoły występują powszechnie w trakcie spermatogenezy zwierząt łącząc z sobą męskie komórki płciowe aż do ich przekształcenia w plemniki. W linii żeńskiej (oogeneza) zespoły mogą się w ogóle nie formować, powstają na bardzo krótki czas (do mejozy) lub na dłużej (do zaawansowanej oogenezy). Pomimo uniwersalnego mechanizmu powstawania zespołów (niepełna cytokineza) obserwujemy dużą różnorodność w ich organizacji przestrzennej i funkcjonowaniu. Niniejszy artykuł przedstawia podstawowe fakty związane z powstawaniem i funkcjonowaniem zespołów komórek płciowych w linii męskiej i żeńskiej.

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Gonads in Histiostoma mites (Acariformes: Astigmata): Structure and development

Cited by 7 publications

References 21 publications

Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees

Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees

Acarorum Catalogus Ix

Zespoły komórek płciowych w gametogenezie zwierząt - geneza, organizacja i funkcjonowanie

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