Metabolism of14C-Pebulate in Seedling Tobacco

Abstract

Extracts from the roots and shoots of tobacco (Nicotiana tabacumL. ‘Kentucky 14′) seedlings treated with14C-pebulate (S-propyl-1-14C butylethylthiocarbamate) were separated into various organic and aqueous phases to determine the distribution of14C. In the roots the organic acid-carbohydrate fraction became the most highly labeled fraction with time while in the shoots the fraction containing the sterol esters and oligoglycerides was the most highly labeled early in the treatment period but gradually lost radioactivity at later time intervals. Pebulate was not recovered in detectable amounts in either the leaves or roots.