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Sporulation of Amblyospora (Microspora) in female Culex salinarius: induction by 20-hydroxyecdysone

Published online by Cambridge University Press:  06 April 2009

J. C. Lord  and
D. W. Hall
J. C. Lord
Affiliation:
Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611, USA
D. W. Hall
Affiliation:
Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611, USA
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Summary

Amblyospora sp. is a microsporidian parasite which is transovarially transmitted from an infected female Culex salinarius to her progeny. This transmission is dependent on synchronization of sporulation of the parasite and ovarian development of the host, both of which are initiated when the mosquito takes a blood meal. We induced sporulation in the absence of a blood meal and, with or without prior ovariectomy, by injection of 20-hydroxyecdysone, a hormone whose precursor, ecdysone, is produced by the ovaries of blood-fed mosquitoes. Sporulation in response to a blood meal was prevented by ovariectomy of the host prior to blood feeding or by decapitation immediately after feeding.

Type
Research Article
Information
Parasitology , Volume 87 , Issue 3 , December 1983 , pp. 377 - 383
Copyright
Copyright © Cambridge University Press 1983

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References

REFERENCES

Andreadis, T. G. & Hall, D. W. (1979). Development ultrastructure, and mode of transmission of Amblyospora sp. (Microspora) in the mosquito. Journal of Protozoology 26, 444–52.Google Scholar
Beckmeyer, E. F. & Lea, A. O. (1980). Induction of follicle separation in the mosquito by physiological amounts of ecdysterone. Science 209, 815–21.Google Scholar
Borovsky, D. (1981). Feedback regulation of vitellogenin synthesis in Aedes aegypti and aedes atropalpus. Insect Biochemistry 11, 207–13.Google Scholar
Borovsky, D. & Van Handel, E. (1979). Does ovarian ecdysone stimulate mosquitoes to synthesize vitellogenin? Journal of Insect Physiology 25, 861–5.Google Scholar
Fuchs, M. S. & Kang, S.-H. (1981). Ecdysone and mosquito vitellogenesis: A critical appraisal. Insect Biochemistry 11, 627–33.Google Scholar
Hagedorn, H. H., Kunkel, J. C. & Wheelock, G. (1978). The specificity of an antiserum against mosquito vitellogenin and its use in a radioimmunological precipitation assay for protein synthesis. Journal of Insect Physiology 24, 481–9.CrossRefGoogle Scholar
Hagedorn, H. H., O'Connor, J. D., Fuchs, M. S., Sage, B., Schlager, D. A. & Bohm, M. K. (1975). The ovary as a source of α-ecdysone in adult mosquitoes. Proceedings of the National Academy of Sciences, USA 72, 3255–9.Google Scholar
Lea, A. O. (1963). Some relationships between environment, corpora allata, and egg maturation in aedine mosquitoes. Journal of Insect Physiology 9, 793–809.Google Scholar
Lea, A. O. (1969). Egg maturation in mosquito not regulated by the corpora allata. Journal of Insect Physiology 15, 537–41.Google Scholar
Lea, A. O. (1972). Regulation of egg maturation in the mosquito by the neurosecretory system: the role of the corpus cardiacum. General and Comparative Endocrinology 3, 602–8.Google Scholar
Lea, A. O. (1982). Artifactual stimulation of vitellogenesis in Aedes aegypti by 20-hydroxyecdysone. Journal of Insect Physiology 28, 173–6.Google Scholar
Masler, P. E., Fuchs, M. S., Sage, B. & O'Connor, J. D. (1980). Endocrine regulation of ovarian development in the autogenous mosquito, Aedes atropalpus. General and Comparative Endocrinology 41, 250–9.Google Scholar
Nayar, J. K. & Knight, J. W. (1981). Occurrence of ovariolar dilatations in nulliparous mosquitoes: Culex nigripalpus. Mosquito News 41, 281–7.Google Scholar
Ohtaki, T. & Williams, C. M. (1970). Inactivation of α-ecdysone and cyasterone by larvae of the fleshfly, Sarcophaga peregrina and pupae of the silkworm Samia cynthia. Biological Bulletin 138, 326–33.Google Scholar
Xiang-xiong, Z., Zhi-Fu, C. & Mei-Xun, C. (1980). Endogenous molting hormone level and vitellogenin synthesis during adult stage of the mosquito, Culex pipiens pallens Coq. Contributions of the Shanghai Institute of Entomology 1, 63–8.Google Scholar