Optimisation of germination time and temperature on the concentration of bioactive compounds in Brazilian soybean cultivar BRS 133 using response surface methodology

Luz Maria Paucar-Menacho, Mark A. Berhow, José Marcos Gontijo Mandarino, Elvira Gonzalez de Mejia, Yoon Kil Chang

Research output: Contribution to journalArticle

Abstract

The objective was to optimise the effect of germination time and temperature on the concentration of soluble protein, lunasin, BBI, lectin, saponins and isoflavones in soybean seeds from cultivar BRS 133. Isoflavone and saponin concentrations were analysed by HPLC. Lunasin, Bowman-Birk inhibitor and lectin were analysed by ELISA and western blot. The effects of the variations in germination time and temperature on bioactive compounds were analysed using the response surface methodology (RSM), with a 22 central composite rotational design. Germination of soybean for 42 h at 25 °C resulted in an increase of 61.7% of lunasin, decrease of 58.7% in lectin and 70.0% in lipoxygenase activity. Optimal increases in the concentrations of isoflavone aglycones were observed in combination of 63 h of germination and 30 °C. A significant increase of 32.2% in the concentration of soy saponins was observed in combination of 42 h of germination at 25 °C.

Original languageEnglish (US)
Pages (from-to)636-642
Number of pages7
JournalFood chemistry
Volume119
Issue number2
DOIs
StatePublished - Mar 15 2010

Keywords

  • Bowman-Birk inhibitor
  • Germination
  • Isoflavone
  • Lectin
  • Lunasin
  • Saponin
  • Soy peptides
  • Soybean

ASJC Scopus subject areas

  • Analytical Chemistry
  • Food Science

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