Fig. 3

Effects of fermentation optimization on production of cembratriene-ol. a Effects of adding glucose and yeast extract with different proportions on the production of cembratriene-ol. b Effects of adding glucose and yeast extract with different proportions on the residual glucose concentration and the conversion yield at 48 h. CK means no addition of additional glucose and yeast extract, and the glucose concentration of CK is 4 g L^-1. c Effects of different fermentation time on cembratriene-ol production under the proportion of glucose:yeast extract = 4:8. d Effects of different fermentation time on the residual glucose concentration and the conversion yield. Student’s t-test was used to statistically analyze data, and statistical significance was set at p value < 0.05. Asterisks indicate significant differences compared to E. coli Z25 (***, p < 0.01; **, p < 0.05; *, p > 0.05). p < 0.05 was considered statistically significant