Journal
SPRINGERPLUS
Volume 2, Issue -, Pages -Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1186/2193-1801-2-335
Keywords
PHB; Pseudomonas mandelii CBS-1; Facultative psychrotrophs; H-1-nuclear magnetic resonance; Fermentation
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Funding
- National Science Foundation of China [51008012]
- Open Science Foundation of Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology [JSBEET1314]
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A novel facultative psychrotroph (strain CBS-1), which accumulates poly-beta-hydroxybutyrate (PHB), was isolated from soil samples taken from Changbai Mountain, China. Phylogenetic analysis based on 16S rRNA sequence data and Biolog analysis identified strain CBS-1 as Pseudomonas mandelii. Transmission electron micrographs revealed abundant electron-transparent intracellular granules. H-1-nuclear magnetic resonance analysis revealed that the granules were composed of PHB. P. mandelii CBS-1 grew optimally at 20 degrees C. When cultured aerobically for 48 h with sucrose as the sole carbon source, strain CBS-1 yielded a maximum cell density of 29.3 g/L cell dry weight and synthesized 22.3 g/L of PHB. The ability of strain CBS-1 to grow at a low temperature and rapidly synthesize high levels of PHB may reduce the costs of industrial PHB production.
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