Journal of Chemical Ecology

, Volume 11, Issue 10, pp 1349–1358

Synergism between myristicin and xanthotoxin, a naturally cooccurring plant toxicant

  • May Berenbaum
  • Jonathan J. Neal
Article

Abstract

Myristicin, a methylenedioxyphenyl (MDP)-containing phenylpropene constituent of the leaves of many plants in the family Umbelliferae, is a highly effective Synergist of the cooccurring furanocoumarin xanthotoxin. As little as 0.10 % in an artificial diet can increase the toxicity of xanthotoxin toHeliothis zea (Lepidotera: Noctuidae) fivefold. In addition to increasing the proportion of caterpillars dying at a given xanthotoxin concentration, myristicin also increases the rate at which they die and increases the time to molt of surviving larvae. That there was no increase in the deterrency of xanthotoxin in the presence of myristicin suggests that the mechanism of synergism is not behaviorial but rather is biochemical, via MDP competitive inhibition of microsomal mixed function oxidases.

Key words

Methylenedioxyphenyl compounds myristicin piperonyl butoxide synergism Umbelliferae xanthotoxin furanocoumarins Heliothis zea Lepidoptera Noctuidae insect-plant interaction 

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Copyright information

© Plenum Publishing Corporation 1985

Authors and Affiliations

  • May Berenbaum
    • 1
  • Jonathan J. Neal
    • 1
  1. 1.Department of EntomologyUniversity of Illinois at Urbana-ChampaignUrbana

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