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Brassica  species are important economic vegetable crop, and it is possible to enrich them with selenium (Se) to supplement human diets. The health benefits associated with increased Se consumption include cancer suppression, reduced heart disease, and immune system enhancement. Vegetables enriched with Se can serve as excellent delivery systems of organic Se forms, which are more beneficial than traditional Se supplements. The vegetable Brassicas are consumed not only for their flavor, but also for their nutritional content. A heterogeneous population of rapid-cycling  B. oleracea  was used as a model system to study the effects of added selenate-Se on other plant micro- and macronutrients. Plants were grown in nutrient solutions amended with sodium selenate at 0.0, 3.0, 6.0, and 9.0 mg·L –1 . Leaf tissues were then analyzed for nutrient content. Boron ( P  = 0.001) and iron ( P  = 0.01) content decreased, while selenium ( P  = 0.001), sulfur ( P  = 0.001), and potassium ( P  = 0.001) increased with increasing selenate-Se. Significant quadratic responses were found for calcium ( P  = 0.02), copper ( P  = 0.05), magnesium ( P  = 0.01), and molybdenum ( P  = 0.01). No differences in leaf fresh or dry weight were detected. Changes in plant nutrient content can be expected when Brassicas are enhanced for delivery of beneficial organic Se.

553 Nutrient Content of a Model System of Rapid-cycling Brassica oleracea Responds to Increasing Sodium Selenate