Figure S1

viable cells count growth rate of Streptococcus thermophilus F7 in different pH conditions (a), growth curves and three growth stages (T1, T2, T3) of S. thermophilus F7 at different pH values (6.5, 5.8, 5.5) (b), and CFU/mL of Streptococcus thermophilus F7 at different pH values (6.5, 5.8, 5.5) (c). Different lowercase letters (a-i) indicate significant differences (P < 0.05).