Regulation of vitellogenin synthesis and uptake in the boll weevil, Anthonomus grandis
| Autor: | Tina E. Taub-Montemayor, Mary Ann Rankin |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
medicine.medical_specialty
animal structures Physiology Biology biology.organism_classification Vitellogenin Endocrinology Anthonomus Insect Science Internal medicine Curculionidae Juvenile hormone Hemolymph medicine biology.protein Vitellogenesis Corpus allatum Ecology Evolution Behavior and Systematics Hormone |
| Zdroj: | Physiological Entomology. 22:261-268 |
| ISSN: | 1365-3032 0307-6962 |
| DOI: | 10.1111/j.1365-3032.1997.tb01167.x |
| Popis: | Hormonal factors influencing reproductive development were examined in adult boll weevils, Anthonomus grandis (Boheman) (Coleoptera: Curculionidae). Long-day, high-temperature rearing conditions promote reproduction whereas short-day, low-temperature conditions do not. Implants of corpora allata (CA), brains, or brains plus retrocerebral complexes taken from long-day donors, or hormone analogue treatments were used to examine onset of vitellogenin synthesis and uptake in decapitated bodies of adult weevils reared in short-day, low-temperature conditions. Weevils decapitated within 2 days after eclosion and reared in short-day, low-temperature conditions never initiated vitellogenin production or ovarian development. Females and males decapitated on day 2 showed haemolymph vitellogenin within 5 days following treatment with Juvenile Hormone (JH) analogue or implantation of CA, but not after implantation of brain alone or implantation of muscle (sham). Uptake of vitellogenin into the oocytes did not occur unless both JH analogue and brain were given as replacement therapy. These experiments indicated that JH is necessary and sufficient to stimulate vitellogenin synthesis in this species but that a brain factor must be present for vitellogenin uptake. |
| Databáze: | OpenAIRE |
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