Glucosinolates in Rutabaga Grown in Soil Capped over Coal Fly Ash

Nine glucosinolates were measured by HPLC analysis in rutabaga grown on soil capped over a coal fly ash landfill or on normal clay and silt loam soil. Progoitrin (2‐hydroxybut‐3‐enyl glucosinolate) and neoglucobrassicin (1‐methoxy‐3‐indolylmethyl glucosinolate) were the most abundant glucosinolates found. Progoitrin and three other minor glucosinolates were present in the natural soil‐grown rutabaga in greater amounts than in that grown in fly‐ash soil. However, fly ash grown rutabaga contained comparatively greater levels of glucobrassicin (3‐indolylmethyl glucosinolate) and neoglucobrassicin, the major glucosinolate present.