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Effects of Sulfur Fertilization on the Accumulation of Health-Promoting Phytochemicals in Radish Sprouts

Zhou, Chenguang, Zhu, Yi, Luo, Yunbo
Journal of agricultural and food chemistry 2013 v.61 no.31 pp. 7552-7559
anthocyanins, sulfur, germination, seeds, radishes, phenolic compounds, carotenoids, ascorbic acid, glucosinolates
The effects of sulfur fertilization on the growth profile, the contents of glucosinolates, anthocyanins, vitamin C, carotenoids, chlorophylls, total phenolics, and the FRAP value in radish seeds and sprouts were investigated. The concentrations of glucosinolates and antioxidants in sprouts were strongly influenced by the process of germination. Sulfur fertilization induced significant increases in the contents of individual glucosinolates, carotenoids, chlorophylls, and total phenolics. The phenolic contents in sprouts cultivated using 20, 60, or 100 mg/L sulfate were 20.7%, 40.4%, and 40.8% higher, respectively, than those of 7-day-old control sprouts. No detectable effects were observed on the contents of 4-methoxy-glucobrassicin and vitamin C. In addition, the accumulation of anthocyanins in 7-day-old sprouts decreased by 14.8–39.3% upon sulfur fertilization. These findings indicated that the application of sulfur fertilization has the potential to enhance the levels of health-promoting compounds in radish sprouts.