The formation of ?accessory nuclei? in the developing o�cytes of the parasitoid hymenopterans Ophion luteus (L.) and Apanteles glomeratus (L.)

King, P. E.; Fordy, M. R.

doi:10.1007/bf00365238

Cited by 33 publications

(21 citation statements)

References 42 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%

“…5A). In all hymenopteran species studied to date, AN form during previtellogenic growth of the oocyte (Hopkins, 1964;Meng, 1968;King and Fordy, 1970;Bilinski, 1991a). Initially they surround the germinal vesicle (Figs.…”

Section: An Morphogenesis and The Nature Of Pseudonucleolimentioning

confidence: 99%

“…2C,3,4 arrows) that contains two membranes and is virtually identical to the nuclear envelope (King and Fordy, 1970;Meyer et al, 1979;Bilinski, 1991a;Jaglarz et al, 2005). 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.…”

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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.…”

mentioning

confidence: 99%

“…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. Phryne cincta Phryne fenestralis Tachypeza nubila Zissler and Sander, 1982Meyer et al, 1979Meyer et al, 1979 this report…”

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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%

Section: An Morphogenesis and The Nature Of Pseudonucleolimentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

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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2014

The Braconid and Ichneumonid Parasitoid Wasps

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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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The formation of ?accessory nuclei? in the developing o�cytes of the parasitoid hymenopterans Ophion luteus (L.) and Apanteles glomeratus (L.)

Cited by 33 publications

References 42 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

References

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

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