Table 1. Main chemical composition of the culture media.
CJ | PJ | MRS | |
---|---|---|---|
pH | 5.81 ± 0.02a | 3.69 ± 0.02c | 5.71 ± 0.01b |
Total titratable acidity (mL NaOH 0.1 M 10 ml−1) | 1.2 ± 0.1c | 7.4 ± 0.2a | 4.4 ± 0.1b |
Soluble solids (Brix) | 5.6 ± 0.2b | 11.1 ± 0.4a | 5.5 ± 0.1b |
Total phenols (mM gallic acid eq) | 3.0 ± 0.3b | 5.4 ± 0.2a | n.d. |
Buffering capacity (mmol HCl pH−1 l−1) | 5.0 ± 0.1c | 27.0 ± 0.8a | 20.0 ± 0.6b |
Free amino acids (mg l−1) | 1095 ± 37b | 574 ± 37c | 3800 ± 61a |
Glucose (mM) | 58 ± 2c | 206 ± 5a | 115 ± 4b |
Fructose (mM) | 47 ± 1b | 212 ± 7a | n.d. |
Sucrose (mM) | 56 ± 2a | 33 ± 2b | n.d. |
Malic acid (mM) | 29 ± 1a | 21 ± 1b | n.d. |
Citric acid (mM) | n.d. | 20 ± 1 | n.d. |
The data are the means of three independent experiments ± standard deviation, analysed in duplicate.
Means within a row with different letters (a–c) are significantly different (P < 0.05). n.d., Not detected.