Metabolism of Amitrole in Apple: I. Soluble Metabolites from Mature Fruits

Abstract

Abstract Mature fruits from apple trees contain residual amounts of radiolabel derived from soil-ap- plied [3,5-14C]amitrole. This report deals with characterization of the soluble part of this radioactivity. By GC/MS of suitable derivatives 3-(1,2,4-triazol-1-yl)-2-aminopropionic acid was identified as a new metabolite of amitrole. Significant parts of radiolabel were incorporated into genuine plant products, indicating liberation of 14CO2 from the applied substance followed by reassimilation. Possible pathways of metabolism of amitrole within the system soil/apple tree are discussed.