Figure 6
From: Lactobacillus rossiae strain isolated from sourdough produces putrescine from arginine
Cell survival after acidic pH challenge. Cells were grown in MRS or MRS + Ort and harvested at mid-exponential growth. The cells were then resuspended in PBS buffer (filled columns) or PBS + Ort (empty columns) and adjusted to the pH indicated. Cell viability was measured after 2 h. Each value represents the mean of three independent experiments. Differences in survival in the presence of ornithine were tested against the control using the Student t test (*p < 0.05, **p < 0.01).
