Electron Microscope Study of the Vitelline Body of Some Spider Oocytes

Sotelo, Julio; Trujillo‐Cenóz, O.

doi:10.1083/jcb.3.2.301

Cited by 58 publications

(11 citation statements)

References 12 publications

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“…Odor i960confirms the increased occurrence in the later stages of oocyte growth. (Similar structures have been seen in glomerular epithelial cells by Yamada, 1955, and in spider oocytes by Sotelo and Trujillo-Cenoz, 1957.) In the ovarian oocyte, the surface of the vitellus was found to be thrown up into microvilli which project a short distance into the zona pellucida.…”

Section: The Mammalian Eggsupporting

confidence: 62%

The mammalian egg

Austin¹

1961

255

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Primary oocytes exist in large numbers in the ovarian cortex of young animals. They themselves seem incapable of division and their abundance is owing to the earlier multiplication of the oogonia from which they have differentiated. As a feature of differentiation, the oocyte nucleus starts upon the early prophase changes of the first meiotic division, the chromosomes become somewhat condensed, and the nucleus then passes into the dictyate stage. Those oocytes that are not destined, as many are, for early degeneration remain in this stage until meiosis is suddenly resumed shortly before or soon after ovulation. The precise form assumed by the chromosomes in the dictyate stage is uncertain though they clearly lose their earlier partially condensed appearance. In oocyte nuclei in fish, amphibians, reptiles and birds, the chromosomes take on the form of fine long threads bearing numerous lateral loops, and are referred to as lampbrush chromosomes. Their special significance is still conjectural-they may play a part in yolk synthesis. Equivalent structures have yet to be demonstrated in mammalian oocytes. Recent observations of Ohno, Kaplan and Kinosita (i960) showed that the two X chromosomes in rat oocytes are isopycnotic, both at the first meiotic prophase and the second meiotic metaphase. This is in contrast to the positively heteropycnotic state of the XY bivalent in spermatocytes, as previously demonstrated by these workers (Ohno, Kaplan and Kinosita, 1957, 1958), and they suggest that the condition in spermatocytes represents an evolved mechanism that prevents crossing-over and ensures isolation of the femaledetermining chromosome from the male-determining chromosome. Crossing-over between the two X chromosomes in oocytes, on the

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Section: The Mammalian Eggsupporting

confidence: 62%

The mammalian egg

Austin¹

1961

255

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“…The multivesicular bodies described here for cytoplasm of the tunicate oocyte are similar to those reported in the oocytes of other species (4,34,36). Such bodies may also appear in other cell types.…”

Section: Discussionsupporting

confidence: 86%

“…Electron microscope studies on animal ovaries have dealt chiefly with changes in the cytoplasm of the growing oocyte and with the morphological relationships between the oocyte and its follicle or nurse cells. Published accounts include work on molluscs (29,46), echinoderms (2,3), insects (20), arachnids (34,35), fishes (18), amphibians (14,16,43), birds (28), and mammals (4,9,22,36,38,41,45). As a contribution to comparative oogenesis, the present studies were undertaken to characterize the ultrastructure of oocytes, test cells, and follicle cells in a representative urochordate, Molgula manhattensis.…”

mentioning

confidence: 99%

An electron microscope study on the oocyte, test cells and follicular envelope of the tunicate, Molgula manhattensis

Kessel

Kemp

1962

Journal of Ultrastructure Research

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“…Among invertebrates, the Bbs have been described in almost all investigated taxa. In some arthropods, e.g., spiders and myriapods, the Bbs are large, conspicuous, and persist in the ooplasm until the advanced stages of oogenesis [ 30 – 34 ]; in other species, the Bbs are relatively small and transient [ 35 – 37 ]. The most detailed and comprehensive description of the Bb morphology and morphogenesis in non-model invertebrates comes from the ultrastructural (EM) analyses of Thermobia domestica (firebrat) oocytes [ 9 , 21 , 37 , 38 ].…”

Section: Balbiani Body: Composition and Suggested Functionsmentioning

confidence: 99%

Selection of mitochondria in female germline cells: is Balbiani body implicated in this process?

Biliński

Kloc

Tworzydło

2017

J Assist Reprod Genet

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Early oocytes of nearly all animal species contain a transient organelle assemblage termed the Balbiani body. Structure and composition of this assemblage may vary even between closely related species. Despite this variability, the Balbiani body always comprises of numerous tightly clustered mitochondria and accumulations of nuage material. It has been suggested that the Balbiani body is an evolutionarily ancestral structure, which plays a role in various processes such as the localization of organelles and macromolecules to the germ plasm, lipidogenesis, as well as the selection/elimination of dysfunctional mitochondria from female germline cells. We suggest that the selection/elimination of mitochondria is a primary and evolutionarily ancestral function of Balbiani body, and that the other functions are secondary, evolutionarily derived additions. We propose a simple model explaining the role of the Balbiani body in the selection of mitochondria, i.e., in the mitochondrial DNA (mtDNA) bottleneck phenomenon.

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Electron Microscope Study of the Vitelline Body of Some Spider Oocytes

Abstract: P~AI"~s 95 To 98

Cited by 58 publications

References 12 publications

The mammalian egg

The mammalian egg

An electron microscope study on the oocyte, test cells and follicular envelope of the tunicate, Molgula manhattensis

Selection of mitochondria in female germline cells: is Balbiani body implicated in this process?

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