Fig. 2. PCA score and loading scatterplot for averaged and pre-processed data (autoscaling and outlier removal) including culturability on solid media, characteristic parameters for growth behaviour in liquid media and descriptors of acidification activity in milk of three Lactococcus. lactis strains (S1, S2 and S3) after fluorescent labelling. Panel a shows scores of PC2 versus PC1 for Lactococcus lactis subsp. lactis S1 (;), Lactococcus lactis subsp. lactis S2 (✴) and Lactococcus lactis subsp. cremoris S3 (-) with the 95% confidence interval; extremes are labelled with dye(s) and corresponding concentration level (1 for low and 2 for high dye concentrations). Panel b shows loadings for culturability (A), growth parameters (:) and acidification descriptors () of PC2 versus PC1.