Content of glucosinolates in cruciferous vegetables grown at the same sitefor two years under different climatic conditions

Individual glucosinolates (GLS) were determined in vegetables of three Cruc iferae species: Brassica oleracea L. (white cabbage, red cabbage, Savoy cab bage, Brussels sprouts, cauliflower, kale, kohlrabi), Brassica rapa L. (tur nip), and Raphanus sativus L. (red radish, black radish, and white radish) produced in two years. The cultivars were compared for the contents of tota l-, indole-, and aliphatic GLS. In both years, the total content of GLS was highest in black radish, and all examined R. sativus vegetables contained the greatest amount of aliphatic GLS. Neither the level nor the identity of GLS differentiated among the vegetables of the other cultivars grown in th e same year. Comparison of the GLS contents of the same cultivar in two pro duction years, which differed in temperature and rainfall rate, showed that low average 10-day rainfall and high average temperature during the vegeta tion period significantly increased the GLS content of vegetables. This sug gests that the year x cultivar interaction modified the GLS content of vege tables.