Isolation and Identification of Oceanisphaera sp. JJM57 from Marine Red Algae Laurencia sp. (Ceramiales: Rhodomelaceae)
2013
Kim, M.C., Korea Fisheries Resources Agency Jeju Station, Jeju, Republic of Korea | Dharaneedharan, S., Jeju National University, Jeju, Republic of Korea | Moon, Y.G., Haerim Fucoidan Co., Ltd., Wando, Republic of Korea | Kim, D.H., Jeju National University, Jeju, Republic of Korea | Son, H.J., Pusan National University, Miryang, Republic of Korea | Heo, M.S., Jeju National University, Jeju, Republic of Korea
A taxonomic study was carried out to assess the phylogenetic characteristics of isolate JJM57 from marine red algae Laurencia sp. collected from intertidal zone in Jeju Island, South Korea. Comparative analysis of 16S rRNA gene sequence shows that this isolate belongs to the genus Oceanisphaera. It shows 98.02% and 97.7% sequence similarity with Oceanisphera litoralis DSM 15406T and Oceanisphera donghaensis KCTC 12522T, respectively. Strain JJM57 is a Gram-negative, aerobic, moderately halophilic bacterium able to grow in different NaCl concentration ranges from 0.5 to 8.0% and at varying temperatures from 4 to 37℃. Sharing some of the physiological and biochemical properties with O. litoralis and O. donghaensis, JJM57 strain differs in the utilization of ethanol, proline, and alanine. The G+C contents of the strain JJM57 is 61.94 mol% and it is rich in C16:1 ω7c and/or iso-C15:0 2-OH, C16:0, and C18:1 ω7c fatty acids. The DNA-DNA relatedness data separates the strain JJM57 from other species such as O. litoralis and O. donghaensis. On the basis of these polyphasic evidences, present study proposed that strain JJM57 (=KCTC 22371 =AM983543 =CCUG 60764) represents a novel bacterial species of Oceanisphaera.
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