Department of Plant Physiology, Faculty of Sciences, University of Granada, 18071 Granada, Spain.
Department of Biology, University of Napoli"Federico II", Via Cinthia, 80126 Napoli, Italy.
Plant Sci. 2017 May;258:45-51. doi: 10.1016/j.plantsci.2017.02.004. Epub 2017 Feb 14.
Zn deficiency is currently listed as a major risk factor for human health. Recently, a complimentary solution to mineral malnutrition termed 'biofortification' has been proposed. The aim of this study was to investigate the possible effects of a Zn-biofortification program on Zn levels, amino acidic profile and the phytochemicals content in an edible leafy vegetable, such as Brassica oleracea cv. Bronco. Our results indicate that supplementation of 80-100μM Zn is optimal for maintaining the normal growth of plants and to promote the major Zn concentration in the edible part of B. oleracea. Any further increase of Zn supply induced an accumulation of total amino acids, and increased the enzymatic activities involved in sulfur assimilation and synthesis of phenols, finally resulting in a foliar accumulation of glucosinolates and phenolic compounds. Thus, it could be proposed that the growth of B. oleracea under 80-100μM Zn may increase the intake of this micronutrient and other beneficial compunds for the human health.
锌缺乏目前被列为影响人类健康的主要因素之一。最近，提出了一种补充矿物质营养的方法，称为“生物强化”。本研究旨在探讨锌生物强化方案对食用叶菜类蔬菜（如甘蓝型油菜 cv. Bronco）中锌水平、氨基酸谱和植物化学物质含量的可能影响。我们的结果表明，补充 80-100μM 的锌是维持植物正常生长和促进甘蓝型油菜可食用部分主要锌浓度的最佳选择。进一步增加锌的供应会导致总氨基酸的积累，并增加参与硫同化和酚类合成的酶活性，最终导致叶中硫代葡萄糖苷和酚类化合物的积累。因此，可以提出在 80-100μM 的锌下生长的甘蓝型油菜可能会增加对这种微量元素和其他有益于人类健康的化合物的摄入。
