Effect of Steroids on Gonadal Growth and Gametogenesis in the Juvenile Red Sea Urchin Pseudocentrotus depressus
| Autor: | Toshio Akiyama, T Yamamoto, Tatsuya Unuma |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
medicine.medical_specialty
Gonad biology media_common.quotation_subject Estrone biology.organism_classification chemistry.chemical_compound Endocrinology medicine.anatomical_structure chemistry Internal medicine medicine Androstenedione Reproduction General Agricultural and Biological Sciences Spermatogenesis Gametogenesis Testosterone Red sea urchin media_common |
| Zdroj: | The Biological bulletin. 196(2) |
| ISSN: | 1939-8697 |
| Popis: | Red sea urchins, 10 months old, were fed for 30 days on a casein-based diet containing progesterone, androstenedione, testosterone, estrone, or estradiol-17{beta}. The mean gonad indices of male animals in the androstenedione-and the estrone-treated groups were significantly higher than those in the control group, suggesting that these steroids promote gonadal growth in male animals. Histological observations indicated that spermatogenesis in the estrone-treated group was also promoted compared to that in the control group. In contrast, female urchins were not obviously affected by the steroid-treated diets, probably because yearling female P. depressus are not otherwise ready to carry out gametogenesis. We conclude that androstenedione, estrone, and possibly their derivatives, are involved in the reproduction of male P. depressus. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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