title: Halogranum rubrum gen. nov., sp. nov., a halophilic archaeon isolated from a marine solar saltern.
abstract: Two extremely halophilic archaea, strains RO2-11(T) and HO2-1, were isolated from two Chinese marine solar salterns, Rudong solar saltern and Haimen solar saltern, respectively. Cells of the two strains were polymorphic and Gram-stain-negative; colonies were red-pigmented. The two strains grew at NaCl concentrations of 2.6-4.3 M (optimum 3.9 M) and required at least 0.1 M Mg2+ for growth. They were able to grow over a pH range of 6.0-8.0 and a temperature range of 20-50 degrees C, with optimal pH of 7.5 and optimal temperature of 37 degrees C. The major polar lipids of strain RO2-11(T) and strain HO2-1 were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester and three glycolipids, two of them chromatographically identical to S-DGD-1 and DGD-1, the third unidentified. The 16S rRNA gene sequence similarity of strain RO2-11(T) and strain HO2-1 was 99.3 % and highest sequence similarity with the closest relative (Haloferax larsenii) was 91.4 %. Based on the data obtained, the two isolates could not be classified in any recognized genus of the family Halobacteriaceae. Strain RO2-11(T) and strain HO2-1 are thus considered to represent a novel species of a new genus within the family Halobacteriaceae, for which the name Halogranum rubrum gen. nov., sp. nov. is proposed. The type strain is RO2-11(T) (=CGMCC 1.7738(T) =JCM 15772(T)).
authors: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors: Heng-Lin
authors: HL
authors: Cui
authors: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors: Xia
authors: X
authors: Gao
authors: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors: Fang-Fang
authors: FF
authors: Sun
authors: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors: Ying
authors: Y
authors: Dong
authors: Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, PR China.
authors: Xue-Wei
authors: XW
authors: Xu
authors: State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China.
authors: Yu-Guang
authors: YG
authors: Zhou
authors: State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China.
authors: Hong-Can
authors: HC
authors: Liu
authors: Institute of Life Sciences, and the Moshe Shilo Minerva Center for Marine Biogeochemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
authors: Aharon
authors: A
authors: Oren
authors: State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China.
authors: Pei-Jin
authors: PJ
authors: Zhou
mesh_terms: D001105:Archaea / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D001482:Base Composition; D005780:Gelatin / Q000378:metabolism; D005990:Glycerol / Q000378:metabolism; D006216:Halobacteriaceae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D019621:Haloferax / Q000145:classification / Q000235:genetics / Q000302:isolation & purification; D008969:Molecular Sequence Data; D010641:Phenotype; D010802:Phylogeny; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012623:Seawater / Q000382:microbiology; D013213:Starch / Q000378:metabolism
chemical_list: D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D005780:Gelatin; D013213:Starch; D005990:Glycerol