Uptake, Translocation, and Degradation of Diphenamid in Plants

Abstract

The rate of uptake and translocation ofN,N-dimethyl-2,2-diphenylacetamide (diphenamid-14C) varied among different species. Apoplastic translocation of diphenamid occurred rapidly in tomato (Lycopersicon esculentumMill.) seedlings, intermediate in bermudagrass (Cynodon dactylonL. ‘328’) and slowly in winged euonymus [Euonymus alatus(Thunb.) Seib. ‘compacta’]. Diphenamid-14C was dealkylated to give N-methyl-2,2-diphenylacetamide (MDA) in both winged euonymus and tomato plants. After 8 days, approximately 60% of the benzene-extractable labeled compounds from both plants was MDA and 39% was diphenamid. However, less of the radioactive material in winged euonymus was extracted.