Formation and function of accessory nuclei in the oocytes of the bird louse, Eomenacanthus stramineus (Insecta, Mallophaga)

Biliński, S

doi:10.1007/bf00371973

Cited by 17 publications

(15 citation statements)

References 21 publications

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“…The morphogenesis of AN has been documented only in a small number of species, such as the bird louse Eomenacanthus stramineus (Bilinski, 1989) and certain hymenopteran species (Hopkins, 1964;King and Fordy, 1970;Cassidy and King, 1972;Bilinski, 1991a;Klag and Bilinski, 1994). Regardless of the species, the AN originate from the germinal vesicle by budding or folding of its envelope ( Fig.…”

Section: An Morphogenesis and The Nature Of Pseudonucleolimentioning

confidence: 99%

“…and King, 1972;Meyer et al, 1979;Zissler and Sander, 1982;Billen, 1985;Bilinski and Jankowska, 1987;Bilinski, 1989Bilinski, , 1991aSzklarzewicz et al, 1993;Bilinski et al, 1993Bilinski et al, , 1995aJablonska and Bilinski, 2001). Depending on their developmental stage and the species, AN vary in size; they can reach 5-10 µm in diameter (Bilinski, 1991a;Ferree et al, 2006).…”

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confidence: 99%

“…Like its nuclear counterpart, the AN envelope is pierced by pores and covered with ribosomes, and its internal membrane, at least in some species, is lined with distinguishable lamina (Figs. 2C,3,4C) (Bilinski, 1989;1991a).…”

mentioning

confidence: 99%

“…AN are filled with electron translucent ground substance (matrix), usually containing electron-dense inclusions traditionally termed pseudonucleoli 2C,3,4) (Hopkins, 1964;King and Fordy, 1970;Cassidy and King, 1972;Meyer et al, 1979;Bilinski, 1989Bilinski, , 1991aSzklarzewicz et al, 1993). The molecular compositions of these inclusions appear to be the key to under- Blochmann, 1886Palm, 1948Hopkins, 1964 King andRichards, 1968;Ferree et al, 2006King and Fordy, 1970King and Fordy, 1970Meng, 1968, 1970Cassidy and King, 1972Billen, 1985Bilinski, 1991a, 1995aBilinski, 1991bSzklarzewicz et al, 1993Bilinski et al, 1995;Adamska and Bilinski, 1997Klag and Bilinski, 1994Bilinski et al, 1995bZawadzka, 1996 Jablonska andBilinski, 2001;Bilinski and Kloc, 2002;Jaglarz et al, 2005Ferree et al, 2006Ferree et al, 2006 this report this report Diptera Smittia sp.…”

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confidence: 99%

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Accessory nuclei in insect oogenesis: in search of the function of enigmatic organelles

Jaglarz¹,

Kloc²,

Biliński³

2008

Int. J. Dev. Biol.

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This review compiles present knowledge of the structure and molecular composition of the enigmatic cytoplasmic organelles called accessory nuclei. Most typically, they are found in the perinuclear cytoplasm in oocytes of insects and several other invertebrates. Accessory nuclei originate by budding of the oocyte nucleus (germinal vesicle) and are surrounded by an enelope identical to the nuclear envelope. They contain one or several dense inclusions called pseudonucleoli immersed in a translucent ground substance or matrix. Comparative analysis of the morphology, molecular composition and the ultimate fate of accessory nuclei and their inclusions revealed that there are two basic types of these organelles in insect oocytes. In mallophagans, accessory nuclei are associated with the oocyte nucleus throughout entire oogenesis and at least some of them are connected to the germinal vesicle by slender stems. Each accessory nucleus contains a single, dense, RNA-positive inclusion which is likely to correspond to a nucleolus. In hymenopterans, accessory nuclei initially surround the germinal vesicle but during oogenesis they separate from it and migrate toward the peripheral ooplasm. Within the accessory nucleus matrix usually two distinct inclusions develop. One of these is perfectly spherical, contains coilin and small nuclear ribonucleoproteins and is homologous to the Cajal body. In the light of recent discoveries, we discuss the role accessory nuclei play in insect oogenesis and early embryogenesis.

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Section: An Morphogenesis and The Nature Of Pseudonucleolimentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Accessory nuclei in insect oogenesis: in search of the function of enigmatic organelles

Jaglarz¹,

Kloc²,

Biliński³

2008

Int. J. Dev. Biol.

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“…It has commonly been reported that vitelline envelope synthesis in many insects depends upon FC activity (Cummings, 1972;Regier et al, 1982;Margaritis 1985Margaritis , 1986Bilinski & Jankowska, 1987;Mazzini & Gaino, 1988;Gaino & Mazzini, 1990;Kaulenas, 1992;Rosciszewska, 1995), even though in some Lepidoptera a participation of the oocyte in this process was also documented (Hopkins & King, 1966;Cruickshank, 1972).…”

Section: Discussionmentioning

confidence: 99%

Fine structure of the egg envelopes inSilo mediterraneus saturniae(Trichoptera, Goeridae)

Bicchierai

Gaino

2000

Italian Journal of Zoology

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The temporal sequence of eggshell organization (vitelline envelope and chorion) in Silo mediterraneus saturniae (Trichoptera, Goeridae) is highlighted by means of ultrastructural investigation on ovarioles of newly emerged females. Precursors of the vitelline envelope, initially accumulating in the space around egg microvilli, merge together to give rise to a striated border. Discrete striae fuse into the final electron-dense vitelline envelope. Choriogenesis takes place along the apical region of the follicle cells facing the egg, throughout the progressive release of precursor material synthesized by the follicular epithelium. The onset of chorionic layer deposition is marked by irregular patches which gradually interconnect. As choriogenesis progresses, the follicular epithelium reduces in thickness. An epichorion, with a fibrillar texture, becomes gradually distinct from the follicle cell cytoplasmic matrix and is superimposed on the chorion. At the end of choriogenesis (chorion and epichorion synthesis) the follicular epithelium progressively separates from the egg and folds markedly, giving the chorion a pleated appearance. The synthesis and morphology of the eggshell in 5. mediterraneus saturniae are compared with those described for other insects laying eggs in water.

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Structure of the germinal vesicle during oogenesis in leechGlossiphonia heteroclita (Annelida, Hirudinea, Rhynchobdellida)

Świątek¹

2005

J. Morphol.

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Oogenesis in the glossiphoniid leech Glossiphonia heteroclita (Hirudinea, Rhynchobdellida) is nutrimental, i.e., the growing oocyte is supported by specialized germline cells, the nurse cells. The main function of the nurse cells is to provide oocytes with cell organelles and RNAs (mainly rRNA). However, in studied leech species, irrespective of the nutrimental mode of oogenesis, the germinal vesicle (GV = oocyte nucleus) seems to be very active in rRNA production. As shown in the present study, during early previtellogenesis in the GV the meiotic chromosomes and prominent primary nucleoli occur. In late previtellogenesis the chromosomes condense and occupy a limited space of nucleoplasm in close vicinity to primary nucleolus, forming a karyosome. At the onset of vitellogenesis several prominent extrachromosomal DNA bodies appear in close association with the karyosome. At the same time, the primary nucleolus is no longer visible in the GV. As vitellogenesis proceeds the extrachromosomal DNA bodies undergo fragmentation and numerous spherical, RNA- and AgNOR-positive inclusions occur in the nucleoplasm. They are regarded as multiple nucleoli. Finally, in late oogenesis numerous accessory nuclei are formed in close proximity to the nuclear envelope. They usually contain one dense body, morphologically similar to multiple nucleoli. The amplification of rDNA genes, the occurrence of extrachromosomal DNA bodies, as well as the presence of multiple nucleoli and accessory nuclei are described for the first time in the phylum Annelida.

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Formation and function of accessory nuclei in the oocytes of the bird louse, Eomenacanthus stramineus (Insecta, Mallophaga)

Cited by 17 publications

References 21 publications

Accessory nuclei in insect oogenesis: in search of the function of enigmatic organelles

Accessory nuclei in insect oogenesis: in search of the function of enigmatic organelles

Fine structure of the egg envelopes inSilo mediterraneus saturniae(Trichoptera, Goeridae)

Structure of the germinal vesicle during oogenesis in leechGlossiphonia heteroclita (Annelida, Hirudinea, Rhynchobdellida)

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