In many plants, defence systems against herbivores are induced through the octadecanoid pathway, which may also be involved in recruiting natural enemies of herbivores. This pathway can beinduced by treating plants with jasmonic acid or by natural herbivory, and increases resistance against herbivorous insects intomato plants, in part by causing production of toxic and antinutritive proteinase inhibitors and oxidative enzymes.

Correspondence and requests for materials should be addressed to J.S.T. (e-mail: jsthaler@ucdavis.edu)

** NOTICE: In accordance with Title 17 U.S.C. Section 107, this material is distributed for research and educational purposes only. **