Skip to main content

Table 1 Properties of L. lactis IPLA947 and its Lcn972-resistant derivatives R2, R3 and R5

From: Resistance to bacteriocin Lcn972 improves oxygen tolerance of Lactococcus lactis IPLA947 without compromising its performance as a dairy starter

L. lactis MIC Lcn972 (AU/ml) Growth rate (μ) and generation time (g)a
Batch Aerationb Respiration
μ (h−1) g(h) μ (h−1) g(h) μ (h−1) g(h)
947 (WT) 20 0.64 ± 0.10 1.10 ± 0.16 0.38 ± 0.02 1.81 ± 0.08 0.86 ± 0.01 0.81 ± 0.01
R2 > 160 0.60 ± 0.02 1.16 ± 0.05 0.43 ± 0.01* 1.62 ± 0.04 ND ND
R3 > 160 0.63 ± 0.02 1.11 ± 0.03 0.44 ± 0.01* 1.59 ± 0.04 ND ND
R5 80 0.63 ± 0.01 1.10 ± 0.02 0.50 ± 0.01** 1.38 ± 0.04* 0.84 ± 0.01 0.83 ± 0.01
  1. aTwo independent cultures were analysed. Results are expressed as means ± standard deviation
  2. bSignificantly different from the wildtype (WT) L. lactis IPLA947. (*) P < 0.05; (**) P < 0.01
  3. ND: not determined