Iodine Biofortification of Four Brassica Genotypes is Effective Already at Low Rates of Potassium Iodate
AbstractThe use of iodine-biofortified vegetables may be a health alternative instead of iodine-biofortified salt for preventing iodine (I) deficiency and related human disorders. In this study, four Brassica genotypes (broccoli raab, curly kale, mizuna, red mustard) were hydroponically grown with three I-IO3− rates (0, 0.75 and 1.5 mg/L) to produce iodine-biofortified vegetables. Crop performances and quality traits were analyzed; iodine content was measured on raw, boiled, and steamed vegetables. The highest I rate generally increased I content in all Brassica genotypes, without plants toxicity effects in terms of reduced growth or morphological symptoms. After 21 day-iodine biofortification, the highest I content (49.5 µg/100 g Fresh Weight (FW)) was reached in broccoli raab shoots, while after 43 day-iodine biofortification, genotype differences were flattened and the highest I content (66 µg/100 g FW, on average) was obtained using 1.5 mg I-IO3/L. Nitrate content (ranging from 1800 to 4575 mg/kg FW) was generally higher with 0.75 mg I-IO3/L, although it depended on genotypes. Generally, boiling reduced iodine content, while steaming increased or left it unchanged, depending on genotypes. Applying low levels of I proved to be suitable, since it could contribute to the partial intake of the recommended dose of 150 µg/day: A serving size of 100 g may supply on average 24% of the recommended dose. Cooking method should be chosen in order to preserve and/or enhance the final I amount. View Full-Text
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Gonnella, M.; Renna, M.; D’Imperio, M.; Santamaria, P.; Serio, F. Iodine Biofortification of Four Brassica Genotypes is Effective Already at Low Rates of Potassium Iodate. Nutrients 2019, 11, 451.
Gonnella M, Renna M, D’Imperio M, Santamaria P, Serio F. Iodine Biofortification of Four Brassica Genotypes is Effective Already at Low Rates of Potassium Iodate. Nutrients. 2019; 11(2):451.Chicago/Turabian Style
Gonnella, Maria; Renna, Massimiliano; D’Imperio, Massimiliano; Santamaria, Pietro; Serio, Francesco. 2019. "Iodine Biofortification of Four Brassica Genotypes is Effective Already at Low Rates of Potassium Iodate." Nutrients 11, no. 2: 451.
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