Advertisement

Experientia

, Volume 41, Issue 9, pp 1165–1167 | Cite as

Regulation of juvenile hormone titer in African locust

  • F. Couillaud
  • B. Mauchamp
  • A. Girardie
Short Communications

Summary

In the African locust, the titer of C-16 JH in hemolymph (determined by GC-MS), reflects the rate of hormone biosynthesis (determined by RCA) in normal adult females. Severance of the nervi corporis allati-I (NCA-I) results in a low C-16 JH biosynthesis without affecting physiological events dependent on JH. In NCA-I-transectioned animals, JH titer is higher than in control locusts. JH catabolism does not seem to be involved in this high titer of hormone associated with a very low rate of JH production. In sham-operated females, the bulk of injected [3H]C-16 JH quickly disappeared from the hemolymph but JH was retained in the bloodless body. After severance of the NCA-I, the remaining radiolabeled JH in the hemolymph increased. These results suggest the role of tissue JH-binding or of JH excretion in regulating its level in the locust.

Key words

Juvenile hormone biosynthesis catabolism tissue binding titer disconnected copora allata, locust 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Akamatsu, Y., Dunn, P. E., Kezdy, F. J., Kramer, K. J., Law, J. H., Reibstein, D., and Sandurg, L. L., in: Control Mechanisms in Development, p. 123. Eds R. H. Meints and E. Davies. Plenum, New York 1975.Google Scholar
  2. 2.
    Wing, K. D., Rudnicka, M., Jones, G., Jones, D., and Hammock, B. D., J. comp. Physiol.154 (1984) 213.Google Scholar
  3. 3.
    Tobe, S. S., in: Insect biology in the future, p. 345. Eds M. Locke and D. S. Smith. Academic Press, New York 1980.Google Scholar
  4. 4.
    De Kort, C. A. D., and Granger, N. A., A. Rev. Ent.26 (1981) 1.CrossRefGoogle Scholar
  5. 5.
    Tobe, S. S., and Pratt, G. E., Nature252 (1974) 474.PubMedGoogle Scholar
  6. 6.
    Girardie, J., Tobe, S. S., and Girardie, A., C.r. Acad. Sci. Paris293 (1981) 443.Google Scholar
  7. 7.
    Couillaud, F., Girardie, J., Tobe, S. S., and Girardie, A., J. Insect Physiol.30 (1984) 551.CrossRefGoogle Scholar
  8. 8.
    Joly, L., Thesis, p. 103. University of Strasbourg, Strasbourg 1960.Google Scholar
  9. 9.
    De Kort, C. A. D., Kramer, S. J., and Wieten, M., in: Comparative Endocrinology, p. 507. Eds R. J. Gaillard and H. H. Boer. Elsevier, North Holland, Amsterdam 1978.Google Scholar
  10. 10.
    Peter, M. G., Gunawan, S., Gellissen, G., and Emmerich, H., Z. Naturforsch.34 (1979) 588.Google Scholar
  11. 11.
    Khan, M. A., Koopmanschap, A. B., and De Kort, C. A. D., Gen. comp. Endocr.52 (1983) 214.PubMedGoogle Scholar
  12. 12.
    Bergot, B. J., Ratcliff, M., and Schooley, D. A., J. Chromat.204 (1981) 231.CrossRefGoogle Scholar
  13. 13.
    Mauchamp, B., Couillaud, F., and Malosse, C., Analyt. Biochem., in press (1985).Google Scholar
  14. 14.
    Tobe, S. S., Pratt, G. E., and Weaver, R. V., in: Comparative Endocrinology, p. 503. Eds R. J. Gaillard and H. H. Boer. Elsevier North Holland, Amsterdam 1978.Google Scholar
  15. 15.
    Huibregtse-Minderhoud, L., Van Den Hondel-Franken, M. A. M., Van Der Kerk-Van Hoof, A. C., Biessels, H. W. A., Salemink, C. A., Van Der Horst, D. J., and Beenakkers, A. M. T., J. Insect Physiol.26 (1980) 627.CrossRefGoogle Scholar
  16. 16.
    Bergot, B. J., Schooley, D. A., and De Kort, C. A. D., Experientia37 (1981) 909.Google Scholar

Copyright information

© Birkhäuser Verlag 1985

Authors and Affiliations

  • F. Couillaud
    • 1
    • 2
  • B. Mauchamp
    • 1
    • 2
  • A. Girardie
    • 1
    • 2
  1. 1.Laboratoire de Neuroendocrinologie, UA CNRS 683Université de Bordeaux ITalence Cedex(France)
  2. 2.Laboratoire de PhytopharmacieINRAVersailles(France)

Personalised recommendations