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Int J Syst Evol Microbiol 58 (2008), 2694-2698; DOI  10.1099/ijs.0.65799-0
© 2008 International Union of Microbiological Societies

Lacinutrix algicola sp. nov. and Lacinutrix mariniflava sp. nov., two novel marine alga-associated bacteria and emended description of the genus Lacinutrix

Olga I. Nedashkovskaya1,2, Kae Kyoung Kwon1, Sung-Hyun Yang1, Hee-Soon Lee1, Kyung Ho Chung3 and Sang-Jin Kim1

1 Marine Biotechnology Research Center, Korea Ocean Research and Development Institute, PO Box 29, Ansan 425-600, Republic of Korea
2 Pacific Institute of Bioorganic Chemistry of the Far-Eastern Branch of the Russian Academy of Sciences, Pr. 100 Let Vladivostoku 159, 690022 Vladivostok, Russia
3 Korea Polar Research Institute, Korea Ocean Research and Development Institute, Songdo Technopark 7-50, Incheon PO Box 32, 406-840, Republic of Korea

Correspondence
Sang-Jin Kim
s-jkim{at}kordi.re.kr

Two heterotrophic, aerobic, yellow-pigmented, Gram-negative, non-gliding bacteria, designated AKS293T and AKS432T, isolated from a red alga, were analysed using a polyphasic taxonomic approach. 16S rRNA gene sequence analysis revealed that the novel strains were affiliated to the genus Lacinutrix, a member of the family Flavobacteriaceae, showing sequence similarities of 96.1–96.4 % with respect to the type strain of Lacinutrix copepodicola. The two novel isolates shared 99.5 % 16S rRNA gene sequence similarity and 55.0 % DNA–DNA relatedness. They grew optimally at 17.5 °C and pH 6.5. The main cellular fatty acids of strain AKS293T were iso-C15 : 0, iso-C15 : 0 3-OH and iso-C16 : 0 3-OH, while those of strain AKS432T were anteiso-C15 : 0, iso-C15 : 0, iso-C15 : 1 and iso-C15 : 0 3-OH. In both cases, the major isoprenoid quinone was MK-6. The DNA G+C contents were 34.7 and 37.0 mol% for strains AKS293T and AKS432T, respectively. The phylogenetic evidence, phenotypic data and DNA–DNA hybridization results support the differentiation of strains AKS293T and AKS432T from each other and from their closest relative, L. copepodicola DJ3T. Therefore, strains AKS293T and AKS432T represent two novel species, for which the names Lacinutrix algicola sp. nov. and Lacinutrix mariniflava sp. nov. are proposed, respectively. The type strain of L. algicola sp. nov. is AKS293T (=KCCM 42313T=JCM 13825T) and the type strain of L. mariniflava sp. nov. is AKS432T (=KCCM 42306T=JCM 13824T). An emended description of the genus Lacinutrix is also proposed.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains AKS293T and AKS432T are DQ167238 and DQ167239, respectively.






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