Kurilich A C, Tsau G J, Brown A, Howard L, Klein B P, Jeffery E H, Kushad M, Wallig M A, Juvik J A
Departments of Natural Resources and Environmental Sciences, Food Science and Human Nutrition, and Veterinary Pathobiology, University of Illinois, Urbana 61801, USA.
J Agric Food Chem. 1999 Apr;47(4):1576-81. doi: 10.1021/jf9810158.
Cruciferous vegetables contain high levels of vitamins that can act as antioxidants, compounds that may protect against several degenerative diseases. The edible portions of 50 broccoli and 13 cabbage, kale, cauliflower, and Brussels sprouts accessions were assayed to determine variation in alpha-carotene, beta-carotene, alpha-tocopherol, gamma-tocopherol, and ascorbate contents within and between subspecies of Brassica oleracea. Ascorbate content was estimated in fresh samples using HPLC. Tissues for carotene and tocopherol analysis were lyophilized prior to extraction. Carotene and tocopherol concentrations were simultaneously measured using a reverse phase HPLC system. Results indicate that there is substantial variation both within and between subspecies. Kale had the highest levels of vitamins, followed by broccoli and Brussels sprouts with intermediate levels and then by cabbage and cauliflower, with comparatively low concentrations. Variability in vitamin content among the broccoli accessions suggests that potential health benefits that accrue with consumption are genotype dependent.
十字花科蔬菜含有大量可作为抗氧化剂的维生素，这些化合物可能预防多种退行性疾病。对50份西兰花以及13份卷心菜、羽衣甘蓝、花椰菜和抱子甘蓝品种的可食用部分进行了分析，以确定甘蓝变种亚种内和亚种间α-胡萝卜素、β-胡萝卜素、α-生育酚、γ-生育酚和抗坏血酸含量的差异。使用高效液相色谱法（HPLC）对新鲜样品中的抗坏血酸含量进行了估算。用于胡萝卜素和生育酚分析的组织在提取前进行了冻干。使用反相高效液相色谱系统同时测量胡萝卜素和生育酚浓度。结果表明，亚种内和亚种间都存在显著差异。羽衣甘蓝的维生素含量最高，其次是西兰花和抱子甘蓝，含量中等，然后是卷心菜和花椰菜，浓度相对较低。西兰花品种间维生素含量的变异性表明，食用西兰花所带来的潜在健康益处取决于基因型。
