Absorption, translocation, and metabolism of flurtamone in sicklepod (Cassia obtusifolia) and peanut (Arachis hypogea)

Abstract

The basis of peanut tolerance to the bleaching herbicide flurtamone was examined. The absorption, translocation, and metabolism of ¹⁴C-flurtamone were examined in peanut at 6, 24, and 48 h after root application. Differences in ¹⁴C-flurtamone uptake over time were not detected. Approximately 40% of the absorbed ¹⁴C-flurtamone was in the leaves at 6 h after treatment; 60% was metabolized to polar products 41% of absorbed ¹⁴C in 6 h; 40% of this moved from roots to shoots; and 60% of this did not co-chromatograph with the parent; 9.8% of applied ¹⁴C-flurtamone was altered in leaf tissue. The levels of metabolized flurtamone increased with time after treatment (75% and 83% of applied ¹⁴C-flurtamone metabolized at 24 and 48 h, respectively). Parent ¹⁴C-flurtamone was detectable with R_t of 7 min and unknown metabolites with an R_t of 3.3, 4.4, and 5.6 min, respectively, was detected in leaf tissue at 6, 24, and 48 h after treatment.