Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 55:1057-1061 (1975)
© 1975 American Society of Plant Biologists

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Articles

Photoaffinity-labeled Auxins

Synthesis and Biological Activity 1

Nelson J. Leonarda and John C. Greenfielda,2

Ruth Y. Schmitzb and Folke Skoogb

a School of Chemical Sciences, University of Illinois, Urbana, Illinois 61801, Institute of Plant Development, Birge Hall, University of Wisconsin, Madison, Wisconsin 53706

Two light-sensitive analogs of 2,4-dichlorophenoxyacetic acid, namely 4-azido-2-chlorophenoxyacetic acid and 3-azido-5-chlorophenoxyacetic acid, have been synthesized for use as auxin photoaffinity labels. The preparation and biological activity of the compounds are described. Both contain the photolabile azido group; the 2,4-substituted compound shows auxin activity and the 3,5-substituted compound does not. These photoaffinity analogs of 2,4-dichlorophenoxyacetic acid may be useful in the identification of the auxin receptor molecules in plant cells and eventually of the receptor sites within these molecules.

2 Present address: Laboratorium für Organische Chemie, Eidgenossische Technische Hochschule, CH-8006 Zürich, Switzerland.

1 This work was supported at the University of Illinois by National Institutes of Health Research Grant GM-05829 and at the University of Wisconsin by NSF Research Grant GB-35260X1 (BMS72-02226).






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Copyright © 1975 by the American Society of Plant Biologists