Finally,the fermentation period was 6 h shorter by adding all these vitamins at their optimal doses than by adding biotin only,and the accumulation of L-serine and the biomass were 9.0g/L and 11g/L,which were 70% and 76% higher than the control.

• 将6种维生素在其分别的最优浓度下复配；添加在发酵培养基中；结果发现发酵周期有6h左右的缩短；并且达到的最大生物量及L-丝氨酸的积累分别为11g/L和9.；0g/L。