Figure 3.

Antimicrobial activity of the S. nigra peptide extract. Microplate antimicrobial assay of peptide extract against E. coli, A. salmonicida sp. salmonicida, F. psychrophilum, V. anguillarum and V. ordalii. Antibacterial activity was evaluated with 10 μg/mL, 50 μg/mL, or 100 μg/mL of the flowers peptide extract (n = 6) in two independent experiment. Phospholipase-A2-derived synthetic peptide at 55.7 μg/mL was used as a positive control. Negative controls were performed under the same conditions without the addition of peptide.