| Autor: |
Beydon, P., Mauchamp, B., Lhonoré, J., Bouthier, A., Lafont, R. |
| Zdroj: |
Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology; March 1980, Vol. 136 Issue: 1 p21-29, 9p |
| Abstrakt: |
Various experimental procedures have been used to analyze the hormonal controls of ommochrome content inPieris epidermis. They include topical application of JH I, ligation at various ages (associated with 20-OH ecdysone injection), starvation and ommochrome precursor injection. It is concluded that xanthommatin excretion is triggered by 20-OH ecdysone, while JH I has an antagonistic effect. Xanthommatin accumulation does not reflect an excretory pathway for surplus tryptophan, but it appears to be strictly regulated. JH I can inhibit this process, and 20-OH ecdysone does not seem to be involved. It is suggested that this step is controlled by a neuroendocrine mechanism. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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