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| Le Pennec, M. |
| Studies of the gill, digestive gland, and gonads of a large mytilid from the 13 degree N hydrothermal vent site have led to insights concerning the histology and functional anatomy of the gill, as well as the role of this organ in the nutrition of the bivalve. From observations of the digestive gland, it is concluded that this mytilid ingests bacteria, as well as other microscopic organisms of hydrothermal vent and euphotic surface water origin. Histology of the gonad reveals that reproduction in this species is similar to that of shallow-water coastal bivalves. |
| Tipo: Text |
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| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00267/37806/35887.pdf |
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| Fabioux, Caroline; Huvet, Arnaud; Lelong, C; Robert, Rene; Pouvreau, Stephane; Daniel, Jean-yves; Mingant, Christian; Le Pennec, M. |
| The oyster vasa-like gene was previously demonstrated to be specifically expressed in germline cells of adult oysters Crassostrea gigas. In the present study, this gene was used as a molecular marker to establish the developmental pattern of germline cells during oyster ontogenesis. using whole-mount in situ hybridization and real-time PCR. The Oyvlg transcripts appeared to be localized to the vegetal pole of unfertilized oocytes and maternally transmitted to embryos. At early development, these maternal transcripts were observed to segregate into a single blastomere, from the CD macromere of 2-cell stage to the 4d mesentoblast of blastula. From late blastula stage, the mesentoblast divided into two cell clumps that migrated to both sides of the larvae... |
| Tipo: Text |
Palavras-chave: Primordial germ cells; Oyster vasa like gene; Germline; Development; Crassostrea gigas. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-648.pdf |
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| Petit, H; Le Pennec, M; Martin, J. |
| The periostracal groove of the deep-sea hydrothermal vent Mytilid presents a particular anatomical structure. The initial pellicle derives from pre-periostracal membranes surrounding a granular material. The individualized pellicle then progresses between the generating cells where it is coated until its extrusion in the growing periostracal groove. After extrusion, the periostracal pellicle is regularly coated by material secreted by the microvilli of the adjacent periostracal groove cells. |
| Tipo: Text |
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| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00267/37805/35886.pdf |
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