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1 Xinjiang Institute of Microbiology, Xinjiang Academy of Agricultural Science, Urumqi, Xinjiang 830091, PR China
2 College of Prataculture and Environment Sciences, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, PR China
3 The Key Laboratory for Microbial Resources of the Ministry of Education, PR China, and Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology, Yunnan University, Kunming 650091, PR China
4 Institute of Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830008, PR China
Correspondence
Wen-Jun Li
wjli{at}ynu.edu.cn
or
liact{at}hotmail.com
A Gram-positive, aerobic, motile, coccoid, orange-pigmented bacterium, designated strain YIM 91094T, was isolated from a salt lake sample collected from Barkol Lake in Xinjiang Province, north-west China. The strain was able to grow at pH 6.0–8.0 (optimal growth at pH 7.0), at 10–37 °C (optimal growth at 28 °C) and in the presence of 0–25 % (w/v) NaCl [optimal growth in the presence of 10–15 % (w/v) NaCl]. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain YIM 91094T was affiliated with the genus Marinococcus and exhibited levels of sequence similarity of 99.2 % to Marinococcus halotolerans YIM 70157T and 99.7 % to Marinococcus halophilus DSM 20408T. However, it showed moderately low levels of DNA–DNA relatedness with the above type strains (56.0 and 57.5 %, respectively). The peptidoglycan type of strain YIM 91094T was A1
, with meso-diaminopimelic acid as the diagnostic diamino acid. MK-7 was the predominant menaquinone and anteiso-C15 : 0 (49.9 % of the total) and anteiso-C17 : 0 (29.6 %) were the major cellular fatty acids. The DNA G+C content was 48.7 mol%. Strain YIM 91094T possessed chemotaxonomic markers that were consistent with its classification in the genus Marinococcus. On the basis of the data presented, strain YIM 91094T is considered to represent a novel species of the genus Marinococcus, for which the name Marinococcus luteus sp. nov. is proposed. The type strain is YIM 91094T (=KCTC 13214T=CCTCC AA 208014T). An emended description of the genus Marinococcus is provided.
These authors contributed equally to this work. The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 91094T is FJ214659.
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