Fig. 3
Comparison of strains of the subspecies S. carnosus subsp. carnosus (25 strains) and S. carnosus subsp. utilis (13 strains) in terms of net growth at different NaCl concentrations (a), lipolytic activity (b), nitrate reductase activity (c) and proteolytic activity on calcium caseinate agar (d). Horizontal lines Mean values of each group, numbers next to data points number of strains per data point if several strains showed the same result. a Plot of the highest NaCl concentration (g l−1) at which good growth (OD600 ≥ 0.4) was still measured. b, d Plots of lipolytic (b) and proteolytic activity of calcium caseinate (d), displayed as diameter of the halo (in mm). c Plot of nitrate reductase activity (mol NO2 per 1.0 × 107 CFU). The graphs were drawn with SigmaPlot version 10.0 (Systat Software)