Abstract
The goal of this study was to compare the environmental factors that determine viability of the gram-negative photosynthesizing bacteria Rhodobacter capsulatus (specifically, light and growth medium composition) and to assess the effect of these factors on the synthesis and composition of lipopolysaccharides released from the cell wall. Depletion of medium resulted in the release of lipopolysaccharides with a truncated polysaccharide fragment. It is concluded that, due to high viability of these bacteria, the main factor that induced lipopolysaccharide release from the cell wall, irrespective of culturing conditions, is cell division rather than cell death.
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