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Food Science and Biotechnology

, Volume 25, Issue 6, pp 1551–1559 | Cite as

Free and bound form bioactive compound profiles in germinated black soybean (Glycine max L.)

  • Min Young Kim
  • Gwi Yeong Jang
  • Yoonjeong Lee
  • Meishan Li
  • Yeong Mi Ji
  • Nara Yoon
  • Sang Hoon Lee
  • Kyung Mi Kim
  • Junsoo Lee
  • Heon Sang Jeong
Article

Abstract

This study investigated the transition between the free and bound forms of functional compounds in germinated black soybean. Black soybean was germinated at 25°C over 6 days and then the free and bound forms of functional compounds were extracted. Total free polyphenol, flavonoid, and phenolic acid contents in raw black soybean increased from 1.03 mg GAE/g, 0.29 mg CE/g, and 315.67 μg/g to 1.44mg GAE/g, 0.64mg CE/g, and 511.01 μg/g, respectively, by 4 days after germination. Changes to phenolic acid compositions can be divided into four groups, and the germination process can convert compounds to phenolic acid via anabolism and catabolism. The highest total free isoflavone content in germinated black soybean (3,724.40 μg/g) was observed at 4 days. Bound polyphenol, flavonoid, phenolic acid, and isoflavone contents decreased as the germination period increased. These results suggest that the germination process increased compound functionality in black soybean.

Keywords

black soybean germination free form bound form bioactive compound 

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Copyright information

© The Korean Society of Food Science and Technology and Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Min Young Kim
    • 1
  • Gwi Yeong Jang
    • 1
  • Yoonjeong Lee
    • 1
  • Meishan Li
    • 1
  • Yeong Mi Ji
    • 1
  • Nara Yoon
    • 1
  • Sang Hoon Lee
    • 2
  • Kyung Mi Kim
    • 2
  • Junsoo Lee
    • 1
  • Heon Sang Jeong
    • 1
  1. 1.Department of Food Science and BiotechnologyChungbuk National UniversityCheongju, ChungbukKorea
  2. 2.Department of Agrofood ResourcesNational Academy of Agricultural Science, Rural Development AdministrationJeonju, JeonbukKorea

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