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Covalent binding of chlorophenoxyacetic acids to plant cuticles

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Abstract

Leaf cuticles ofClivia miniata, rubber plant (Ficus elastica), oleander (Nerium oleander), pear (Pyrus communis), and olive (Olea europaea), and fruit cuticles of pepper (Capsicum annuum), eggplant (Solarium melongena), and cucumber (Cucumis sativus) bind 2,4-D and 2,4,5-T covalently. The cutins of these plant species contain epoxy groups which react with the carboxyl groups of the phenoxyacetic acids with the formation of an ester linkage. This reaction is first order, both with respect to the concentration of epoxides and phenoxyacetic acids in the cuticle, and proceeds in isolated cuticles as well asin situ. The biological and ecotoxicological implications are discussed.

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Authors and Affiliations

  1. Institut für Botanik und Mikrobiologie, Technische UniversitÄt München, Arcisstra\e 21, D-8000, München 2, Federal Republic of Germany

    Markus Riederer & Jörg Schönherr

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  1. Markus Riederer
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  2. Jörg Schönherr
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Riederer, M., Schönherr, J. Covalent binding of chlorophenoxyacetic acids to plant cuticles. Arch. Environ. Contam. Toxicol. 15, 97–105 (1986). https://doi.org/10.1007/BF01055254

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  • DOI: https://doi.org/10.1007/BF01055254

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