Effect of Field Violet (Viola arvensis) Growth Stage on Uptake, Translocation, and Metabolism of Terbacil

Abstract

Uptake, translocation, and metabolism of14C-terbacil was investigated in 12-leaf (tolerant) and 3-leaf (susceptible) field violet plants. Field violets with 12 leaves absorbed less14C-terbacil g−1of fresh weight from solution culture than did plants with three leaves. Plants with three leaves translocated twice as much radioactivity to foliage than did plants with 12 leaves. Most14C in roots (77%) and foliage (57%) of field violet plants with 12 leaves was in polar metabolites. Metabolism studies indicated that most14C (79%) in foliage extracts from field violet plants with three leaves was14C-terbacil. Polar metabolites were not detected in roots of field violet plants with three leaves.