title: Interaction between atmospheric CO2 and glucosinolates in broccoli.
abstract: Total and individual glucosinolate contents of broccoli cv Marathon were assessed at ambient CO2 (430-480 ppm) and elevated atmospheric CO2 (685-820 ppm) to determine the ecological relationship between changing atmospheric CO2 concentrations and phytochemicals. Elevated atmospheric CO2 concentration had a differing effect on individual glucosinolates and glucosinolate groups. Total glucosinolate content increased at elevated atmospheric CO2 concentration as a result of a strong increase in both methylsulfinylalkyl glucosinolates glucoraphanin and glucoiberin. In contrast, indole glucosinolates simultaneously decreased, predominantly because of a reduction of glucobrassicin and 4-methoxy-glucobrassicin contents. We conclude that changes in N content and N/S ratios as well as alterations in photochemical processes at elevated atmospheric CO2 concentration can influence total and individual glucosinolates contents of Brassicaceae, as demonstrated in the greenhouse, for broccoli.
authors.affiliation: Institute of Vegetable and Ornamental Crops Grossbeeren and Erfurt e. V., Theodor Echtermeyer Weg 1, 14979, Grossbeeren, Germany.
authors.forename: I
authors.initials: I
authors.lastname: Schonhof
authors.forename: H-P
authors.initials: HP
authors.lastname: Kläring
authors.forename: A
authors.initials: A
authors.lastname: Krumbein
authors.forename: M
authors.initials: M
authors.lastname: Schreiner
mesh_terms: D001272:Atmosphere; D001937:Brassica / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D002734:Chlorophyll / Q000737:chemistry; D005453:Fluorescence; D005961:Glucosinolates / Q000737:chemistry*
chemical_list: D005961:Glucosinolates; D002734:Chlorophyll; D002245:Carbon Dioxide