Fig. 3

Effect of different buffers on the growth of L. lactis subsp. lactis SLPE1-3 (a) and the pH values of the culture media (b). Filled diamond the control without buffer; filled square sodium acetate at 5 g/L; filled triangle ammonium citrate at 2 g/L; open square dipotassium phosphate at 2 g/L; open triangle sodium acetate at 5 g/L, ammonium citrate at 2 g/L and dipotassium phosphate at 2 g/L. Each symbol is the average of three replicates