A survey of wound- and methyl jasmonate-induced leaf polyphenol oxidase in crop plants

doi:10.1016/S0031-9422(97)00539-6

Phytochemistry

Volume 47, Issue 4, February 1998, Pages 507-511

https://doi.org/10.1016/S0031-9422(97)00539-6 Get rights and content

Abstract

Polyphenol oxidases (PPOs) are widespread enzymes which oxidize plant phenolic compounds. In tomato leaves, PPO is systemically wound-induced, regulated by the tomato wound signal systemin via the octadecanoid wound-signalling pathway, and appears to function as an anti-nutritive defense against folivore insect pests. In order to determine if PPO could be important for the induced defense of other crop plants, plants from five plant families were surveyed for constitutive, wound-induced, and methyl jasmonate-induced PPO activity. In addition to tomato, PPO was most strongly induced by wounding or methyl jasmonate in tobacco and hybrid poplar. In these plants the response was also shown to be systemically induced by wounding. Two species, willow and soybean, had very high constitutive PPO activities yet showed no significant PPO induction. Most of the species tested had low constitutive levels of PPO activity, and low or no induction by wounding or methyl jasmonate. Although PPO is widely distributed, only in some species does it appear to be a component of the inducible anti-herbivore defense.

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Bergey, D. R., Howe, G. A. and Ryan, C. A., Proceedings of the National Academy of Sciences, U.S.A., in...

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^∗: Present address: Department of Biological Sciences, University of Alberta, Edmonton, Alberta, T6G 2E9, Canada.

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PaperA survey of wound- and methyl jasmonate-induced leaf polyphenol oxidase in crop plants

Abstract

Journal of Insect Physiology

Phytochemistry

Phytochemistry

Advances in Food Research

Phytochemistry

Phytochemistry

Phytochemistry

Analytical Biochemistry

Science

Paper
A survey of wound- and methyl jasmonate-induced leaf polyphenol oxidase in crop plants