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Germ-line cysts in animal gametogenesis - genesis, organization and functioning
Świątek, Piotr ; Urbisz, Anna
Postępy biochemii, 2021-12, Vol.67 (4), p.309
[Periódico revisado por pares]
Poland
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Título:
Germ-line cysts in animal gametogenesis - genesis, organization and functioning
Autor:
Świątek, Piotr
;
Urbisz, Anna
Assuntos:
Animals
;
Cysts
;
Cytoplasm
;
Female
;
Germ Cells
;
Male
;
Meiosis
;
Oogenesis
É parte de:
Postępy biochemii, 2021-12, Vol.67 (4), p.309
Descrição:
During early gametogenesis the incomplete mitotic divisions occur. The cytokinesis is blocked and the sister cells do not fully separate. Instead, they stay connected via modified contractile rings known as stable intercellular bridges or ring canals. Intercellular bridges are broad cytoplasmic strands (from 0,2μm to 20μm in diameter), which allow to exchange the gene products and organelles between interconnected cells. Such syncytial structures are termed germ-line cysts. As a rule, cysts are formed during spermatogenesis and they interconnect germ cells till sperm formation. In the female germ-line (oogenesis) cysts may not form at all, may be formed for a short period of time (till early meiosis) or may function till late oogenesis. Despite of universal mechanism of cysts formation (incomplete cytokinesis and bridge formation) there are substantial differences in cysts organization and functioning between taxa. The present paper gives the basic knowledge about formation and functioning of male and female germ-line cysts.
Editor:
Poland
Idioma:
Polonês
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