May 01, 1994· The metabolism of the herbicide Lphosphinothricin (LPt) was analyzed in tobacco (Nicotiana tabacum), alfalfa (Medicago sativa), and carrot (Daucus carota). In transgenic, Ptresistant plants expressing the PtNacetyltransferase gene (pat), LPt was acetylated, resulting in two forms of NacetylPt (acPt). In transgenic plants expressing only low patencoded acetylating activity as well as ...