Researchers have isolated a new strain of marine bacteria with unique characteristics from the ocean seabed.
, is described by the editors as an important study that advances our understanding of physiological mechanisms in deep-seabacteria, revealing unique characteristics such as being the only known species in the class ofbacteria that uses a distinct budding model of division. It provides what the editors also say is convincing evidence that the new species is extensively involved in nitrogen assimilation and lives with a chronic virus that facilitates nitrogen metabolism.
bacteria are known to reside, and then encouraged their growth by supplementing a standard growth medium with the antibiotic rifampicin and sources of nitrogen. They cultured these enriched bacteria on agar and evaluated individual colonies further by gene sequencing. Among the bacteria, they identified a strain called ZRK32 that grew faster than others, and looked likely to be a member of the genus.
They also discovered that the addition of nitrate or ammonia caused the novel strain to release a bacteriophage -- a type of virus that infects bacteria. Bacteriophages are widely distributed across oceans and can regulate nitrogen metabolism in their host bacteria. This bacteriophage -- called phage-ZRK32 -- was able to increase the growth ofand other marine bacteria dramatically by facilitating nitrogen metabolism.
"Our analyses indicate that strain ZRK32 is a novel species, which grows best in nutrient-rich media and releases a bacteriophage in the presence of nitrogen," concludes senior author Chaomin Sun, a Professor at the Institute of Oceanology, Chinese Academy of Sciences, and the National Laboratory for Marine Science and Technology."This phage-ZRK32 is a chronic bacteriophagethat lives within its host without killing it.
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