Biofortification of soybean sprouts with zinc and bioaccessibility of zinc in the sprouts. (15th April 2014)

• Record Type: Journal Article
• Authors: Zou, Tao; Xu, Na; Hu, Guanglin; Pang, Jinwei; Xu, Hangdan
• Is Part Of: Journal of the science of food and agriculture. Volume 94:Number 14(2014:Nov. 15)
• Page Start: 3053
• Page End: 3060
• Publication Date: 2014-04-15
• Subjects: Food -- Periodicals; Agriculture -- Periodicals; 664
• DOI: 10.1002/jsfa.6658
• Languages: English
• ISSNs: 0022-5142

Abstract

<abstract abstract-type="main" id="jsfa6658-abs-0001"> <title>Abstract</title> <sec id="jsfa6658-sec-0001" sec-type="section"> <title>BACKGROUND</title> <p id="jsfa6658-para-0001">Soybean sprouts are a very popular vegetable in Southeast Asian countries and regions. Zinc‐rich soybean sprouts can help to improve Zn deficiency in humans. The aim of this study was to prepare Zn‐enriched soybean sprouts through agronomic biofortification (germination with ZnSO<sub>4</sub> solution) in order to provide consumers with a dietary material for Zn supplementation.</p> </sec> <sec id="jsfa6658-sec-0002" sec-type="section"> <title>RESULTS</title> <p id="jsfa6658-para-0002">A suitable Zn concentration in ZnSO<sub>4</sub> solution used for cultivation of Zn‐enriched soybean sprouts was found to be less than or equal to 20 µg mL<sup>−1</sup>. Upon biofortification with 10 and 20 µg Zn mL<sup>−1</sup> ZnSO<sub>4</sub> solutions, Zn content (102 and 163 <italic>vs</italic> 32 mg kg<sup>−1</sup> dry weight (DW)), bioaccessible Zn content (3.86 and 8.53 <italic>vs</italic> 1.11 mg kg<sup>−1</sup> DW) and Zn bioaccessibility (3.8 and 5.2 <italic>vs</italic> 3.5%) in edible portions of Zn‐enriched soybean sprouts were significantly enhanced compared with those of water‐germinated soybean sprouts. Meanwhile, no significant differences were observed in Fe, Mn and Cu contents of edible portions of soybean sprouts between ZnSO<sub>4</sub> solution and water germinations, although soaking leakages of minerals (Fe, Mn and Cu) from soybean seeds to steeping media occurred to some degree.</p> </sec> <sec id="jsfa6658-sec-0003" sec-type="section"> <title>CONCLUSION</title> <p id="jsfa6658-para-0003">Soybean sprouts biofortified with ZnSO<sub>4</sub> solution at 10 or 20 µg Zn mL<sup>−1</sup> contained appreciable quantities of Zn and had good Zn bioaccessibility, indicating that Zn‐enriched soybean sprouts may serve as a suitable dietary Zn source to improve the Zn intake of Zn‐deficient populations. © 2014 Society of Chemical Industry</p> </sec> </abstract>