Literaturdatenbank
Literaturdatenbank |
|
 |
|
Ramsey, M. E., & Crews, D. (2009). Steroid signaling and temperature-dependent sex determination—reviewing the evidence for early action of estrogen during ovarian determination in turtles. Seminars in cell & developmental biology, 20(3), 283–292.
Added by: Admin (27 Jun 2009 12:36:27 UTC) Last edited by: Beate Pfau (09 Aug 2009 12:00:14 UTC) |
| Resource type: Journal Article BibTeX citation key: Ramsey2009a View all bibliographic details  |
Categories: General Keywords: Emydidae, Schildkröten = turtles + tortoises, Trachemys, Trachemys scripta, Zeitigung = incubation Creators: Crews, Ramsey Collection: Seminars in cell & developmental biology |
Views: 3/510
Views index: 9% Popularity index: 2.25% |
| Abstract |
|
The developmental processes underlying gonadal differentiation are conserved across vertebrates, but the triggers initiating these trajectories are extremely variable. The red-eared slider turtle (Trachemys scripta elegans) exhibits temperature-dependent sex determination (TSD), a system where incubation temperature during a temperature-sensitive period of development determines offspring sex. However, gonadal sex is sensitive to both temperature and hormones during this period—particularly estrogen. We present a model for temperature-based differences in aromatase expression as a critical step in ovarian determination. Localized estrogen production facilitates ovarian development while inhibiting male-specific gene expression. At male-producing temperatures aromatase is not upregulated, thereby allowing testis development.
Added by: Admin Last edited by: Beate Pfau |
| Notes |
|
WIF
Added by: Beate Pfau |