Chryseobacterium salivictor sp. nov., a plant-growth-promoting bacterium isolated from freshwater

A Gram-stain-negative, non-motile, rod-shaped bacterial strain, designated NBC 122 T , was isolated from freshwater of the Nakdong River Republic of Korea. Growth occurred at pH 5.0–8.0 (optimum, pH 7.0), at 4–37 °C (optimum, 25 °C), and with 0–3.5% (w/v) NaCl (optimum, 1%). Phylogenetic analyses based on 16S rRNA gene sequences showed that strain NBC 122 T belongs to the genus Chryseobacterium and is most closely related to Chryseobacterium antarcticum AT1013 T (97.85%). The average nucleotide identity and in silico DNA–DNA hybridization (DDH) values between strain NBC 122 T and related Chryseobacterium species were 77.77–80.28 and 20.9–23.2%, respectively. The strain NBC 122 T contained MK-6 as the major respiratory quinone. The major fatty acids included anteiso C 15:0 , iso C 15:0 , summed feature 9 (C 17:1 iso ω 9 c , C 16:0 10-methyl) and iso C 17:0 3-OH, and the polar lipids were phosphatidylethanolamine, five unidentified aminolipids and six unidentified lipids. The DNA G + C content was 37.5 mol%. On the basis of a 16S rRNA gene phylogeny and comparative phenotypic analyses, strain NBC 122 T represents a novel species in the genus Chryseobacterium , for which the name Chryseobacterium salivictor sp. nov. is proposed. The type strain is NBC122 T (= KCTC 72248 T = JCM 33980 T ).