International Maize and Wheat Improvement Center (CIMMYT), CIMMYT Research Station , Km. 45 Carretera Mexico-Veracruz, El Batán , Texcoco , CP 56237 Edo. de México , México.
J Agric Food Chem. 2018 Sep 12;66(36):9391-9398. doi: 10.1021/acs.jafc.8b01886. Epub 2018 Aug 28.
Biofortification is a strategy to reduce micronutrient malnutrition. The aim of this study was to investigate whether consumption of biofortified fresh maize can supply nutritionally meaningful amounts of provitamin A carotenoids (PVA), zinc, lysine, and tryptophan. The accumulation patterns for PVA and tocochromanol compounds in developing grain of 23 PVA hybrids was studied, and nutritionally meaningful amounts of those compounds were found in grain by milk stage, when fresh maize is eaten. The highest PVA and tocochromanol accumulation occurred by physiological maturity. The percent apparent retention in boiled fresh maize was 92%, 117%, 99%, and 66% for PVA, zinc, lysine, and tryptophan, respectively. Consumption of 0.5 to 2 ears of fresh maize daily could supply 33-62.2%, 11-24% and more than 85% of the estimated average requirement of PVA, tryptophan, and zinc, respectively. The results indicate that eating biofortified fresh maize can contribute to improved micronutrient nutrition.
生物强化是减少微量营养素营养不良的一种策略。本研究旨在调查食用生物强化新鲜玉米是否能提供有意义的量的类胡萝卜素（PVA）、锌、赖氨酸和色氨酸。研究了 23 种 PVA 杂种在发育中的谷物中 PVA 和生育酚化合物的积累模式，并在食用新鲜玉米的乳熟期发现了这些化合物有意义的营养量。在生理成熟时，PVA 和生育酚化合物的积累量最高。在煮沸的新鲜玉米中，PVA、锌、赖氨酸和色氨酸的表观保留率分别为 92%、117%、99%和 66%。每天食用 0.5 到 2 个新鲜玉米可以提供 PVA、色氨酸和锌的估计平均需求的 33-62.2%、11-24%和 85%以上。结果表明，食用生物强化的新鲜玉米可以改善微量营养素营养。
