气培小叶生菜(Lactuca sativa L.)植株对不同锌、铜、碘和硒浓度的反应

M. Puccinelli, Andrea De Padova, Paolo Vernieri, Giulia Carmassi, Luca Incrocci
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引用次数: 0

摘要

全世界有 20 多亿人缺乏微量营养素。对蔬菜进行生物强化可以通过饮食提高微量营养素的摄入量。本研究评估了利用气生栽培技术对室内种植的小叶莴苣进行生物强化的情况。通过在营养液中添加不同浓度的锌(从 10 微摩尔到 450 微摩尔)或铜(从 3 微摩尔到 250 微摩尔),进行了四次实验,每次两次。第五次实验是在营养液中同时加入根据以前的研究结果选择的 I(5 µM)和 Se(13 µM)的最佳浓度,以及根据前四次实验结果选择的 Zn(250 µM)和 Cu(150 µM)的最佳浓度。叶片生物量、矿物质浓度、叶绿素、类胡萝卜素、酚类、类黄酮、硝酸盐和抗氧化能力在移植 21 天后进行了测量。营养液中 Cu、Zn、I 或 Se 的浓度越高,莴苣叶片中的矿物质浓度就越高,但不会影响莴苣植株的生长或叶片质量。与单独施用 I 元素相比,同时施用 I 和其他元素在叶片中的累积量更高。每 100 克莴苣叶片生物强化 Se、I、Cu 和 Zn 后,Cu、Se 和 I 的充足摄入量分别为 6.1%、35.3% 和 263.0%,Zn 的充足摄入量为人群参考摄入量的 4.5%。我们的研究结果表明,同时用这四种矿物质对小叶莴苣进行生物强化是将这些微量营养素纳入膳食的一种实用而方便的方法,而且不会降低莴苣的产量或质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Response of Aeroponically Cultivated Baby-Leaf Lettuce (Lactuca sativa L.) Plants with Different Zinc, Copper, Iodine, and Selenium Concentrations
Over two billion people worldwide suffer from micronutrient deficiencies. Biofortifying vegetables can enhance micronutrient intake through the diet. This study assessed the biofortification of indoor-grown baby-leaf lettuce using aeroponics. Four experiments, two each, were conducted by adding different concentrations of Zn (from 10 to 450 µM) or Cu (from 3 to 250 µM) into a nutrient solution. A fifth experiment was conducted by simultaneously adding to the nutrient solution the optimal concentration of I (5 µM) and Se (13 µM), chosen on the basis of previous works, and the optimal concentration of Zn (250 µM) and Cu (150 µM), chosen on the basis of the results obtained in the first four experiments. Leaf biomass, mineral concentrations, chlorophylls, carotenoids, phenols, flavonoids, nitrates, and antioxidant capacity were measured 21 days after transplanting. Higher concentrations of Cu, Zn, I, or Se in the nutrient solution led to an increase in their concentrations in lettuce leaves, without affecting the growth or leaf quality of lettuce plants. The simultaneous application of I with the other elements induced a higher accumulation in leaves compared to when I is applied alone. One hundred grams of lettuce leaves biofortified with Se, I, Cu, and Zn would provide the 6.1%, 35.3%, and 263.0% of Adequate Intake for Cu, Se, and I, respectively, and 4.5% of Population Reference Intake for Zn. Our results suggest that simultaneously biofortifying baby-leaf lettuce with these four minerals is a practical and convenient way to integrate these micronutrients into the diet without reducing the yield or quality of lettuce.
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