title: Selenium influences glucosinolate and isothiocyanates and increases sulfur uptake in Arabidopsis thaliana and rapid-cycling Brassica oleracea.
abstract: This study investigated the impact of Se on glucosinolates (GSs) and isothiocyanates (ITCs). Plants of  Arabidopsis thaliana  cv. Columbia and a rapid-cycling base population of  Brassica oleracea  were grown hydroponically under different Se and S concentrations. The objective was to determine the effects of increasing Se and S concentrations on the GSs and ITCs. The results indicate that S and Se concentrations increased in A. thaliana and B. oleracea leaf tissue in response to increasing Se treatments. Aliphatic and total GSs decreased significantly (P ≤ 0.001) from 0.0 to 3.2 mg Se L(-1) in B. oleracea and A. thaliana leaf tissues. Consequently, aliphatic and total ITCs decreased significantly (P ≤ 0.001) from 0.0 to 3.2 mg Se L(-1) in B. oleracea and A. thaliana leaf tissues. Data demonstrate that high levels of anticarcinogenic GSs can be maintained as the Se concentration is increased to 0.8 mg L(-1). Thus, it is feasible to increase Se to beneficial dietary levels without compromising GS concentrations.
authors.affiliation: Plant Sciences Department, The University of Tennessee, Knoxville, Tennessee 37996, United States.
authors.forename: T Casey
authors.initials: TC
authors.lastname: Barickman
authors.forename: Dean A
authors.initials: DA
authors.lastname: Kopsell
authors.forename: Carl E
authors.initials: CE
authors.lastname: Sams
mesh_terms: D017360:Arabidopsis / Q000378:metabolism*; D001937:Brassica / Q000378:metabolism*; D005961:Glucosinolates / Q000378:metabolism*; D017879:Isothiocyanates / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D012643:Selenium / Q000494:pharmacology*; D013455:Sulfur / Q000378:metabolism*
chemical_list: D005961:Glucosinolates; D017879:Isothiocyanates; D013455:Sulfur; D012643:Selenium