Abstract
The physiological, biochemical, genetic, and cultural characteristics of the glucose-utilizing mutant strain Ralstonia eutropha B8562 were investigated in comparison with the parent strain R. eutropha B5786. The morphological, cultural, and biochemical characteristics of strain R. eutropha B8562 were similar to those of strain R. eutropha B5786. Genetic analysis revealed differences between the 16S rRNA gene sequences of these strains. The growth characteristics of the mutant using glucose as the sole carbon and energy source were comparable with those of the parent strain grown on fructose. Strain B8562 was characterized by high yields of polyhydroxyalkanoate (PHA) from different carbon sources (CO2, fructose, and glucose). In batch culture with glucose under nitrogen limitation, PHA accumulation reached 90% of dry weight. In PHA, β-hydroxybutyrate was predominant (over 99 mol %); β-hydroxyvalerate (0.25–0.72 mol %) and β-hydroxyhexanoate (0.008–1.5 mol %) were present as minor components. The strain has prospects as a PHA producer on glucose-containing media.
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Translated from Mikrobiologiya, Vol. 74, No. 6, 2005, pp. 788-794.
Original Russian Text Copyright © 2005 by Volova, Kozhevnikov, Dolgopolova, Trusova, Kalacheva, Aref'eva.
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Volova, T.G., Kozhevnikov, I.V., Dolgopolova, Y.B. et al. Physiological and Biochemical Characteristics and Capacity for Polyhydroxyalkanoates Synthesis in a Glucose-Utilizing Strain of Hydrogen-Oxidizing Bacteria, Ralstonia eutropha B8562. Microbiology 74, 684–689 (2005). https://doi.org/10.1007/s11021-005-0124-6
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DOI: https://doi.org/10.1007/s11021-005-0124-6