6.2.3 Bacterial strain
A gram-negative bacterial strain of bacilli Pseudomonas aeruginosa (n° CIP 105094) used in
the biotic experiments was available from the Institute Pasteur (Paris, France). Before
experiments, bacteria were grown in Luria Bertani medium for 24 h. Afterwards, cells were
harvested and cleaned 3 times with sterile 5% NaCl and re-suspended in ultrapure water.
Thereafter, cells were introduced to the experimental bottles. No adaptation of bacteria to high
metallic element concentrations was done. All biotic experiments began with initial optical
density at a wavelength of 600 nm (OD
600
) of 0.008 in order to ensure equal bacterial cell
number for all replicates.
Do'stlaringiz bilan baham: |