Abstract
Soybean sprouts, a nutritional food product, can contribute to food security because they can be grown within a week and do not require sophisticated technology. The yield and quality of soybean sprouts are influenced by various factors, including seed priming and growing conditions. The objective of this study was to investigate the effects of seed soaking in different concentrations of illite, a clay mineral, on the yield and quality of soybean sprouts. Soybean seeds soaked in five concentrations (0.5%, 1%, 3%, 5%, and 10%, w/v) of illite or tap water for 8 h were named IP-0.5, IP-1, IP3, IP-5, IP-10, and control, respectively. The highest sprout yield was found in IP-3, followed by IP-1, and IP-5, which had 11.1%, 8.8%, and 7.4% increments, respectively, compared to the control. The content of vitamin C, mineral element, isoflavone, total polyphenol, and total flavonoid was higher in many of the illite-treated soybean sprouts than in the control. The overall results indicated that pre-soaking soybean seeds in lower concentrations (0.5−3%, w/v) of illite could be helpful to enhance the yield and nutritional value of soybean sprouts in an easy and inexpensive way.
Highlights
Soybean (Glycine max L.) is an economically important crop with versatile end uses [1,2]; serving as an oil seed crop, feed for livestock, food for humans, and biofuel feedstock [3].Germination enhances the availability of various nutrients such as vitamins, phytosterols, tocopherols, and isoflavones [4,5]
Considering the mineral element composition and other benefits of illite in plant growth and development, this study aimed to investigate the effect of seed soaking with illite solutions on the growth and quality of soybean sprouts
The results indicated that both high and low concentrations of illite treatment do not favor sprout yield increment and vitamin C content
Summary
Soybean (Glycine max L.) is an economically important crop with versatile end uses [1,2]; serving as an oil seed crop, feed for livestock, food for humans, and biofuel feedstock [3].Germination enhances the availability of various nutrients such as vitamins, phytosterols, tocopherols, and isoflavones [4,5]. Soybean (Glycine max L.) is an economically important crop with versatile end uses [1,2]; serving as an oil seed crop, feed for livestock, food for humans, and biofuel feedstock [3]. Germination enhances nutritional and functional values, and improves textural and organoleptic characteristics of legume seeds [8,9,10,11]. Soybean sprouts could help increase food security because it can be grown in a considerably short time, even without using advanced technologies. Soybean sprouts are an inexpensive food sources to supply dietary functional materials [12] and can be used in producing cosmetic products with anti-aging and skin whitening effects [13]
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