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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