Pseudomonas Antarctic Regions Antarctica Bacteria (microorganisms) article genetics metabolism nonhuman physiology Cold Temperature Oxidation-Reduction adaptation bacterial growth cold controlled study growth, development and aging Adaptation, Physiological Gene Expression Regulation, Bacterial Hydroxybutyrates Molecular Sequence Data Mutation Phylogeny Polyesters Pseudomonas extremaustralis bacterial gene bacterial strain enzyme activity nucleotide sequence oxidation reduction reaction poly(3 hydroxybutyric acid)