Influence of fermentation on glucosinolates and glucobrassicin degradation products in sauerkraut

Palani, K.; Harbaum-Piayda, B.; Meske, Diana GND; Keppler, J.K.; Bockelmann, Wilhelm GND; Heller, Knut GND; Schwarz, K.

A systematic investigation was carried out on the influence of fermentation on glucosinolates and their degradation products from fresh raw cabbage, throughout fermentation at 20 °C and storage at 4 °C. Glucosinolates were degraded dramatically between Day 2 and 5 of fermentation and by Day 7 there was no detectable amount of glucosinolates left. Fermentation led to formation of potential bioactive compounds ascorbigen (13.0 μmol/100 g FW) and indole-3-carbinol (4.52 μmol/100 g FW) with their higher concentrations from Day 5 to Day 9. However, during storage indole-3-carbinol slowly degraded to 0.68 μmol/100 g FW, while ascorbigen was relatively stable from Week 4 until Week 8 at 6.78 μmol/100 g FW. In contrast, the content of indole-3-acetonitrile decreased rapidly during fermentation from 3.6 to 0.14 μmol/100 g FW. The results imply a maximum of health beneficial compounds after fermentation (7 to 9 days) in contrast to raw cabbage or stored sauerkraut.

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Palani, K. / Harbaum-Piayda, B. / Meske, Diana / et al: Influence of fermentation on glucosinolates and glucobrassicin degradation products in sauerkraut. 2016.

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