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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zelazowska, M. Jankowska, W. Plewniak, E. Rajek, U. |
| Spatial Coverage | North America Russia |
| Description | Country affiliation: Poland Author Affiliation: Zelazowska M ( Department of Developmental Biology and Morphology of Invertebrates, Institute of Zoology, Jagiellonian University, Gronostajowa 9, 30-387, Kraków, Poland.); Jankowska W ( Department of Developmental Biology and Morphology of Invertebrates, Institute of Zoology, Jagiellonian University, Gronostajowa 9, 30-387, Kraków, Poland.); Plewniak E ( Department of Developmental Biology and Morphology of Invertebrates, Institute of Zoology, Jagiellonian University, Gronostajowa 9, 30-387, Kraków, Poland.); Rajek U ( Department of Developmental Biology and Morphology of Invertebrates, Institute of Zoology, Jagiellonian University, Gronostajowa 9, 30-387, Kraków, Poland.) |
| Abstract | Ovarian nests in the ovaries of sexually maturing Russian sturgeon Acipenser gueldenstaedtii and North American paddlefish Polyodon spathula were investigated. They comprised early previtellogenic, diplotene stage oocytes and somatic cells. In the nucleoplasm, these oocytes contained chromatin in the form of grains, threads and lampbrush chromosomes, primary nucleoli and multiple nucleoli. Two stages of oocytes in nests were distinguished by differences in the distribution of mitochondria with distorted cristae and lipid droplets in the ooplasm. These stages were as follows: pre-early stage 1 (PE 1) and early stage 1 (EP 1) previtellogenic oocytes. In PE 1 oocytes few mitochondria with distorted cristae and lipid droplets were distributed randomly. The ooplasm of PE 1 oocytes was not differentiated into homogeneous and granular compartments. In EP 1 oocytes, mitochondria with distorted cristae were more numerous and grouped in the vicinity of the nucleus, lipid droplets accumulated near these mitochondria. In the nucleoplasm of EP 1 oocytes several low electron-dense spherical bodies, possibly Cajal bodies, were present. |
| File Format | HTM / HTML |
| ISSN | 00221112 |
| Issue Number | 6 |
| Volume Number | 86 |
| e-ISSN | 10958649 |
| Journal | Journal of Fish Biology |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2015-06-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Ovarian Follicle Cell Nucleolus Microscopy, Electron, Transmission Research Support, Non-u.s. Gov't Discipline Ichthyology Chromatin Cytology North America Oocytes Journal Article Russia Ovary Mitochondria Animals Ultrastructure Fishes Female Physiology Cell Nucleus Cytoplasm |
| Content Type | Text |
| Resource Type | Article |
| Subject | Aquatic Science Ecology, Evolution, Behavior and Systematics |
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