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J Microbiol. 2018 Jan;56(1):30-35. doi: 10.1007/s12275-018-7476-x. Epub 2018 Jan 4.

Larkinella roseus sp. nov., a species of the family Cytophagaceae isolated from beach soil.

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Distant-water Fisheries Resources Division, National Institute of Fisheries Science, Busan, 46083, Republic of Korea.
School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea.
Department of Horticulture and Life Science, Yeugnnam University, Gyeongsan, 38541, Republic of Korea.
Department of Bio and Environmental Technology, Seoul Women's University, Seoul, 01797, Republic of Korea.
School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea.
Institute of Plant Medicine, Kyungpook National University, Daegu, 41566, Republic of Korea.


The taxonomic position of bacterial strain, designated 15J16-1T3AT, recovered from a soil sample was established using a polyphasic approach. Phylogenic analysis based on the 16S rRNA gene sequence showed that strain 15J16-1T3AT belonged to the family Cytophagaceae, phylum Bacteroidetes, and was most closely related to 'Larkinella harenae' 15J9-9 (95.9% similarity), Larkinella ripae 15J11-11T (95.6%), Larkinella bovis M2TB15T (94.7%), Larkinella arboricola Z0532T (93.9%), and Larkinella insperata LMG 22510T (93.5%). Cells were rod-shaped, Gram-stain-negative, aerobic, and nonmotile. The isolate grew on NA, R2A, TSA, but not on LB agar. The strain was able to grow at temperature range from 10°C to 30°C with an optimum at 25°C and pH 6-8. Menaquinone MK-7 was the predominant respiratory quinone. The major cellular fatty acids comprised C16:1ω5c (48.6%) and C15:0 iso (24.1%). Phosphatidylethanolamine, phosphatidylserine, and an unidentified lipid were the major polar lipids. The G + C content of the genomic DNA was 49.5 mol%. Strain 15J16-1T3AT could be distinguished from its closest phylogenetic neighbors based on its phenotypic, genotypic, and chemotaxonomic features. Therefore, the isolate is considered to represent a novel species in the genus Larkinella, for which the name Larkinella roseus sp. nov. is proposed. The type strain is 15J16-1T3AT (= KCTC 52004T = JCM 31991T).


Bacteroidetes; Larkinella; soil bacteria

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