Metabolic and Morphological Aspects of Adaptation of Alkaliphilic 5-DB and Alkali-Tolerant ATCC 6633 to Changes in pH and Mineralization.

The goal of the study is to evaluate metabolic and morphological changes of the facultative alkaliphile 5-DB and the weakly alkali-resistant ATCC 6633 in a wide pH range and at different NaCl concentrations. The alkaliphile 5-DB is shown to have a broader general resistance to adverse factors (wide pH range, 50 g/L NaCl) than a weakly alkali-tolerant strain of the same genus. This alkaliphile is also shown to have a significantly greater resistance not only to high pH but also to low pH in comparison with ATCC 6633.