Table 1.
Antimicrobial activity of flesh and peel polyphenols of Actinidia chinensis
| Microorganisms |
Flesh (μg/mL) |
Peel (μg/mL) |
|||||
|---|---|---|---|---|---|---|---|
| 100 | 200 | 300 | 100 | 200 | 300 | ||
| Gram negative | E. coli | - | 11.3±0.30b | 12.4±0.40b | 10.6±0.62a | 13.4±0.47a | 15.9±0.50a |
| Gram positive | S. aureus | 11.4±0.34b | 12.6±0.25b | 14.7±0.37b | 13.7±0.40a | 16.2±0.62a | 20.4±0.30a |
| L. monocytogenes | 10.7±0.42b | 12.3±0.50b | 13.9±0.41b | 13.1±0.40a | 15.7±0.20a | 17.4±0.60a | |
E. coli: Escherichia coli, S. aureus: Staphylococcus aureus, L. monocytogenes: Listeria monocytogenes. Antimicrobial activity was assessed by measuring the inhibition zones in diameter of the paper disk (10 mm). –: no activity. Values are expressed as mean ± SD of triplicate assays. Different letters indicate significant differences (P < 0.05) of peel and flesh polyphenols at the same concentration and for the same bacteria.