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Int J Syst Evol Microbiol 59 (2009), 1036-1039; DOI  10.1099/ijs.0.65734-0
© 2009 International Union of Microbiological Societies

Nitratireductor kimnyeongensis sp. nov., isolated from seaweed

Hye Soon Kang1, Hong Lim Yang1 and Soon Dong Lee1,2

1 Department of Science Education, Cheju National University, Jeju 690-756, Republic of Korea
2 Educational Science Research Institute, Cheju National University, Jeju 690-756, Republic of Korea

Correspondence
Soon Dong Lee
sdlee{at}cheju.ac.kr

An aerobic, Gram-negative, catalase-positive, oxidase-positive bacterium was isolated from a dried seaweed sample collected from Kimnyeong Beach in Jeju, Republic of Korea. The cells of the organism, designated strain KY 101T, were rods (0.4–0.5x1.2–2.7 µm) and motile by means of flagella. The colonies of the cells were 0.5–1 mm in diameter, smooth, circular, convex and light yellow in colour. The isolate showed growth at 10–40 °C, pH 6.1–12.1 and in the presence of 7 % NaCl. The major fatty acid was summed feature C18 : 1{omega}7c/C18 : 1{omega}9c/C18 : 1{omega}12t and the DNA G+C content was 60.4 mol%. 16S rRNA gene sequence studies showed that the organism was phylogenetically related to the family Phyllobacteriaceae, with Nitratireductor aquibiodomus (99.1 % sequence similarity) as the closest neighbour. The level of DNA–DNA relatedness between strain KY 101T and N. aquibiodomus DSM 15645T was 18.4–23.2 % (duplicate measurements). The combination of phenotypic differences and DNA–DNA hybridization data supports the suggestion that the isolate represents a novel species of the genus Nitratireductor, for which the name Nitratireductor kimnyeongensis sp. nov. is proposed. The type strain is strain KY 101T (=KACC 11904T=JCM 14851T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain KY 101T is AM498744.

A transmission electron micrograph of cells of strain KY 101T and cellular fatty acid compositions of strain KY 101T and Nitratireductor aquibiodomus DSM 15645T are available as supplementary material with the online version of this paper.






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