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Neuroendocrine mechanism involved in pupal colour dimorphism in swallowtail Papilio xuthus L.

Published online by Cambridge University Press:  19 September 2011

Leah R. S. Awiti  and
Toshitaka Hidaka
Leah R. S. Awiti
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
Toshitaka Hidaka
Affiliation:
Department of Zoology, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606, Japan
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Abstract

Neuroendocrine mechanism involved in pupal colour dimorphism in Papilio xuthus L. has been studied using ultrastructural techniques. The browning hormone in the form of neurosecretory material is secreted in the brain during the larval stage and transported to the axonal endings in the prothoracic ganglion, irrespective of the colour of the future pupa. If larvae select for pupation environmental conditions that are conducive for the formation of a brown pupa, release of the browning hormone occurs in the middle of the prepupal stage. No release occurs in larvae that have selected environmental conditions that favour the formation of green pupae. It is suggested that the brain, having integrated and interpreted the environmental conditions selected by the larva for pupation, gives the order to release the browning hormone. Such an order is conveyed via neural path from the brain to either the prothoracic ganglion, or some still unknown neurohaemal organ associated with it, from which release then takes place.

Keywords

Neuroendocrine mechanismcolour dimorphismbrowning hormoneneurosecretionbrainprothoracic ganglionneurohaemal organenvironmental conditions
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 3 , Issue 2-3 , September 1982 , pp. 181 - 191
Copyright
Copyright © ICIPE 1982

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References

REFERENCES

Hidaka, T. (1956) Recherches sur le déterminisme hormonal de la coloration pupale chez Lépidoptères. I. Les effets de la ligature, de l'ablation des ganglions et de l'incision des nerfs chez prépupes et larves âgées de quelque Papilionides. Annotnes zool. jap. 29, 69–74.Google Scholar
Hidaka, T. (1961) Recherches sur le mécanisme endocrine de l'adaptation chromatique morphologique chez les nymphes de Papilio xuthus L. J. Fac. Sci. Tokyo Univ. 9, 223–261.Google Scholar
Hidaka, T. and Ohtaki, T. (1963) Effet de l'hormone juvénile et du farnésol sur la coloration tégumentaire de la nymphe de Pieris rapae crucivora Boisd. C. r. Séanc. Soc. Biol. 157, 928–930.Google Scholar
Honda, K. (1978) What are determinants of the pupal colouring of Papilionid pupae? Insectarium 15, 4–8.Google Scholar
Honda, K. (1979) Environmental factors affecting the pupal coloration in Papilio protenor demetrius Cr. (Lepidoptera:Papilionidae) I. Effect of chemical stimulus (odor). Kontyû 47, 191–195.Google Scholar
Kamano, S. (1965) Rearing of Papilio xuthus on artificial diets. Jap. J. appl. Ent. Zool. 9, 133–135.Google Scholar
Ohnishi, E. and Hidaka, T. (1955) Effect of environmental factors on the determination of pupal types in some swallowtails, Papilio xuthus L. and P. protenor demetrius Cr. Zool. Mag., Tokyo 65, 185–187.Google Scholar
Sandeman, D. C. and Okajima, A. (1973) Statocyst-induced eye movements in the crab Scylla serata. III. The anatomical projections of sensory and motor neurons and the responses of the motor neurons. J. exp. Biol. 59, 17–38.CrossRefGoogle Scholar
Smith, A. G. (1978) Environmental factors influencing pupal colour determination in Lepidoptera. I. Experiments with Papilio polytes, Papilio demoleus and Papilio polyxenes. Proc. R. Soc. 200, 295–329.Google Scholar
Smith, A. G. (1980) Environmental factors influencing pupal colour determination in Lepidoptera. II. Experiments with Pieris rapae. Pieris napi and Pieris brassicae. Proc. R. Soc. 207, 163–186.Google Scholar
Tyrer, N. M. and Altman, J. S. (1974) Motor and sensory flight neurones in a locust demonstrated using cobalt chloride. J. comp. Neurol. 157, 117–138.CrossRefGoogle Scholar
Tyrer, N. M. and Bell, E. M. (1974) The intensification of profiles of cobalt-injected neurones in sectioned material. Brain Res. 73, 151–155.Google Scholar