Abstract
Psychrophilic, gas vacuolate, heterotrophic bacteria indigenous to sea ice communities in Antarctica have been isolated. Phylogenetic analysis of representative members of these bacteria shows that they belong to the alpha, beta, and gamma Proteobacteria and the Flavobacteria-Cytophaga group. This is the first report of gas vacuolate bacteria from the beta Proteobacteria and the Flavobacteria-Cytophaga groups.
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