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Int J Syst Evol Microbiol 57 (2007), 2467-2471; DOI  10.1099/ijs.0.64627-0
© 2007 International Union of Microbiological Societies

Novosphingobium nitrogenifigens sp. nov., a polyhydroxyalkanoate-accumulating diazotroph isolated from a New Zealand pulp and paper wastewater

Sarah L. Addison, Sonia M. Foote, Nicola M. Reid and Gareth Lloyd-Jones

Eco-Smart Technologies Group, Scion, Rotorua, New Zealand

Correspondence
Sarah Addison
sarah.addison{at}scionresearch.com

A diazotroph capable of accumulating significant amounts of polyhydroxyalkanoate was isolated in New Zealand from a bioreactor treating nitrogen-deficient pulp and paper-mill effluent. Strain Y88T is Gram-negative, rod-shaped and positive for catalase, nitrate reductase and urease activities. The complete 16S rRNA gene sequence was most similar to those of other members of the genus Novosphingobium, the highest level of similarity (94.7 %) being found with respect to the type strain of Novosphingobium stygium. The combined phenotypic, chemotaxonomic and sequence data show that while strain Y88T belongs to the genus Novosphingobium, it is distinct from all currently recognized Novosphingobium species. Therefore, strain Y88T represents the first nitrogen-fixing species of the genus Novosphingobium, for which the name Novosphingobium nitrogenifigens sp. nov. is proposed. The type strain is Y88T (=ICMP 16470T=DSM 19370T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequence and the nifH gene sequence of strain Y88T are DQ448852 and DQ660368, respectively.

A transmission electron micrograph of Y88T cells containing polyhydroxyalkanoate granules is available as a supplementary figure with the online version of this paper.






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