Strain Llam7 was isolated from microbial mat samples from the hypersaline lake Salar de Llamará, located in Taracapá region in the hyper-arid core of the Atacama Desert (Chile). Phenotypic, chemotaxonomic and genomic traits were studied. Phylogenetic analyses based on 16S rRNA gene sequences assigned the strain to the family with affiliation to the genera and . Major fatty acids were Cω8, iso-C, iso-C and anteiso-C. The cell walls contained -diaminopimelic acid and ll-2,6 diaminopimelic acid (ll-DAP), while major whole-cell sugars were glucose, mannose, xylose and ribose. The major menaquinones were MK-9(H) and MK-9(H). As polar lipids phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol and several unidentified lipids, i.e. two glycolipids, one aminolipid, three phospholipids, one aminoglycolipid and one phosphoglycolipid, were detected. Genome sequencing revealed a genome size of 6.894 Mb and a DNA G+C content of 71.4 mol%. Phylogenetic analyses with complete genome sequences positioned strain Llam7 within the family forming a distinct cluster with (former ) DSM 45730. This cluster is related to KJ-029, NA12, and LHW63014 as well as to all members of the former genera and , which were re-classified as members of the genus , forming a clade distinct from the genus . Pairwise whole genome average nucleotide identity (ANI) values, digital DNA-DNA hybridization (dDDH) values, the presence of the diamino acid ll-DAP, and the composition of whole sugars and polar lipids indicate that Llam7 represents a novel species, for which the name sp. nov. is proposed, with Llam7 (=DSM 109510,=LMG 31023) as the type strain.
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http://dx.doi.org/10.1099/ijsem.0.005109 | DOI Listing |
Syst Appl Microbiol
December 2024
School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China. Electronic address:
Four novel halophilic archaeal strains CGA53, CG83, FCH27, and SEDH24 were isolated from a soda lake and two saline lakes in China, respectively. Strain CGA53 showed the highest 16S rRNA gene similarity (92.6%) to Salinilacihabitans rarus AD-4, and the other three strains were found to be related to Halalkalicoccus species with similarities of 97.
View Article and Find Full Text PDFHuan Jing Ke Xue
November 2024
College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China.
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View Article and Find Full Text PDFPhytoKeys
November 2024
Marine and Continental Waters, Institute for Food and Agricultural Research and Technology (IRTA), Crta de Poble Nou Km 5.5, E-43540 La Ràpita, Catalunya, Spain.
F1000Res
November 2024
Department of Biological Sciences, University of Embu, Embu, Kenya.
Microb Ecol
November 2024
GRECO, Institute of Aquatic Ecology, University of Girona, Av. Mª Aurèlia Capmany, 69, 17003, Girona, Spain.
Saline shallow lakes in arid and semi-arid regions frequently undergo drying episodes, leading to significant variations in salinity and water availability. Research on the impacts of salinity and drought on the structure and function of biofilms in hypersaline shallow lakes is limited. This study aimed to understand the potential changes of biofilms in playa-lake sediments during the drying process.
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