Fig. 7

The time courses for C-glycosylflavonol production using fed-batch in M9-Gly medium. a The time courses for kaempferol 8-C-glucoside production by adding fresh substrates and glycerol, b the time courses for quercetin 8-C-glucoside production by adding fresh substrates and glycerol. In the fermentation process, 4 g/L kaempferol or quercetin and 10 g/L cellobiose were added to the broth at 24 h and 72 h, and 10 g/L glycerol was added to the broth at 24 h, 48 h, 72 h, and 96 h