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Loktanella agnita sp. nov. and Loktanella rosea sp. nov., from the north-west Pacific Ocean

¹ Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia
² Pacific Institute of Bioorganic Chemistry of the Far-Eastern Branch of the Russian Academy of Sciences, Pr. 100 Let Vladivostoku 159, 690022 Vladivostok, Russian Federation
³ Institute of Marine Biology of the Far-Eastern Branch of the Russian Academy of Sciences, 690041 Vladivostok, Russian Federation
⁴ Institute of Microbiology of the Russian Academy of Sciences, 117811 Moscow, Russian Federation
⁵ Pacific Oceanological Institute of the Far-Eastern Branch of the Russian Academy of Sciences, Baltiiskaya Str. 43, 690017 Vladivostok, Russian Federation
⁶ School of Agricultural Science, University of Tasmania, Private Bag 54, Hobart, Tasmania 7001, Australia

Correspondence
Elena P. Ivanova
eivanova{at}swin.edu.au

One whitish and four pinkish strains of Gram-negative, non-motile, aerobic bacteria were isolated from sea-water and sediment samples collected in Chazhma Bay (Sea of Japan, Pacific Ocean). Analysis of 16S rRNA gene sequences revealed that these strains belonged to the ‘Alphaproteobacteria’, having highest sequence similarity of about 94–97 % with species of the genus Loktanella. None of the strains degraded gelatin, casein, chitin, agar, DNA or starch and they had limited ability to utilize carbon sources. The four pinkish strains, Fg36^T, Fg1, Fg116 and Fg117, degraded Tween 80. Sea-water strain R10SW5^T grew at 3–6 % NaCl and a temperature range of 8–35 °C, whilst strains Fg36^T, Fg1, Fg116 and Fg117 grew at NaCl concentrations of 1–12 % and a temperature range of 4–35 °C. Phosphatidylglycerol (58/79 %), diphosphatidylglycerol (11/6 %) and phosphatidylcholine (28/22 %) were the major phospholipids. The predominant fatty acids were 16 : 0 (12·2/8·6 %) and 18 : 17 (76·6/68·4 %). The DNA G+C content of strain R10SW5^T was 59·1 mol% and those of the four pinkish strains ranged from 60·5 to 61·8 mol%. Based on the results of phenotypic, genotypic, chemotaxonomic and phylogenetic investigation, two novel species, Loktanella agnita sp. nov. and Loktanella rosea sp. nov., are proposed. The type strains are R10SW5^T (=KMM 3788^T=CIP 107883^T) and Fg36^T (=KMM 6003^T=CIP 107851^T=LMG 22534^T), respectively.