Enzymatic activity of Lactobacillus reuteri grown in a sweet potato based medium with the addition of metal ions

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Table 4 Effect of metal ions on acid phosphatase activity (Ph U/mL) produced by L. reuteri

	Acid phosphatase activity (Ph U/mL)*
*L. reuteri*	Control	Fe²⁺	Ca²⁺	Na⁺	K⁺	Mg²⁺	Mn²⁺
MF14-C	13.59	14.51	19.14	13.49	13.74	22.24	14.06
MF14-C	±1.51^bB	±1.24^bB	±1.51^aB	±0.98^bB	±0.74^bC	±2.49^aB	±0.90^bC
CF2-7F	14.28	13.44	20.45	14.88	18.69	27.81	24.29
CF2-7F	±1.2^cB	±1.11^cB	±2.16^abB	±1.57^cB	±1.16^bB	±2.43^aAB	±2.54^aA
DSM20016	18.69	15.61	21.41	20.00	20.96	29.33	18.91
DSM20016	±1.15^bcA	±2.40^cB	±2.01^bB	±1.27^bA	±2.19^bB	±2.36^aA	±1.95^bcB
SD2112	20.55	19.73	24.78	20.50	26.64	23.25	23.46
SD2112	±0.74^bA	±0.36^bA	±0.91^aA	±0.95^bA	±1.39^aA	±2.38^aB	±2.07^aA
MM7	12.60	14.65	18.43	13.75	13.74	14.88	17.27
MM7	±1.63^cB	±0.98^abB	±2.66^aB	±2.37^bcB	±1.20^bcC	±1.31^abC	±2.53^aBC
MM2-3	8.73	9.52	14.65	11.91	10.12	14.24	12.71
MM2-3	±1.11^cC	±1.14^bcC	±1.21^aC	±1.41^abBC	±1.31^bcD	±1.49^aC	±1.37^abCD

*Data points with different lower case letters in the same row are significantly (p < 0.05) different. Data points with different upper case letters in the same column are significantly (p < 0.05) different.