Brain-gonad axis and photoperiodically-stimulated sexual maturation in the slug,Limax maximus
| Autor: | Elinor J. McCrone, Phillip G. Sokolove |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
medicine.medical_specialty
Gonad Limax Physiology Slug Biology biology.organism_classification Behavioral Neuroscience chemistry.chemical_compound Castration Endocrinology medicine.anatomical_structure chemistry Internal medicine medicine Sexual maturity Endocrine system Limax maximus Animal Science and Zoology Ecology Evolution Behavior and Systematics Hormone |
| Zdroj: | Journal of Comparative Physiology ? A. 133:117-123 |
| ISSN: | 1432-1351 0340-7594 |
| DOI: | 10.1007/bf00657526 |
| Popis: | Physiological and endocrine mechanisms mediating long-day (LD 16∶8) triggered sexual maturation were studied in the terrestrial slug,Limax maximus. Our findings were: (1) Maturation was induced in immature slugs seeing only short days (LD 8∶16) after implantation of whole brains from maturing donors, but no development was found in sham-operated control slugs or in animals receiving implants of muscle from mature donors (Table 1). (2) Removal of the optic tentacles did not block maturation in LD 16∶8 or promote maturation in LD 8∶16 (Fig. 1). (3) Gonadectomy (castration) abolished penis development in 9 of 11 slugs exposed to LD 16∶8 for periods of up to 31 weeks (Table 2). The results are consistent with a model forLimax reproductive tract development in which the perception of long days by extraocular receptors results in the secretion of a “maturation hormone” by the brain followed by the production of a separate “male-phase sex hormone” by the developing gonad. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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