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Mode of Action Investigations with the Herbicides HOE-39866 and SC-0224

Published online by Cambridge University Press:  12 June 2017

Robin R. Bellinder
Dep. Hort., Virginia Polytech. Inst. and State Univ., Blacksburg, VA 24061
Kriton K. Hatzios
Dep. Plant Pathol., Physiol., and Weed Sci., Virginia Polytech. Inst. and State Univ., Blacksburg, VA 24061
Henry P. Wilson
Virginia Truck and Orn. Res. Stn., Painter, VA 23420


In laboratory experiments, the effects of the herbicides HOE-39866 [ammonium (3-amino-3-carboxypropyl)-methylphosphinate] and SC-0224 (trimethylsulfonium carboxymethylaminomethylphosphonate) on the incorporation of NaH14CO3, [14C]-leucine, [14C]-uracil, and [14C]-acetate into enzymatically isolated soybean [Glycine max (L.) Merr. ‘Essex’] cells were evaluated to assess the activity of these herbicides on CO2 fixation, protein, ribonucleic acid (RNA), and lipid syntheses. At low concentrations neither compound exhibited rapid or distinct inhibitions of any process as might be expected in the case of inhibition of a primary target site. Photosynthesis was the process least affected. At equimolar concentrations, protein and RNA syntheses were more sensitive to HOE-39866 than to SC-0224 while the reverse occurred in lipid synthesis. Protein synthesis appears to be a possible target site that may be involved in the herbicidal action of these two compounds.

Physiology, Chemistry, and Biochemistry
Copyright © 1985 by the Weed Science Society of America 

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