Uptake, translocation, and metabolism of 3-phenoxybenzoic acid in the submerged rooted macrophyte water milfoil (Myriophyllum elatinoides)

Abstract

The uptake of ¹⁴C labeled 3-phenoxybenzoic acid (I) was examined for Myriophyllum elatinoides. The uptake of ¹⁴C-I dissolved in water by the shoot/leaves amounted to 15.85% of the applied radioactivity (AR) after 0.5 days, and ¹⁴C translocation to the roots was minimal during 14 days. Slower uptake of the radioactivity from ¹⁴C-I treated sediment by the roots was observed (6.37%AR after 14 days) and 1.71%AR was translocated to the shoot/leaves. Oxidation, reduction and conjugation of I proceeded in the macrophyte.