Journal
MICROORGANISMS
Volume 8, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/microorganisms8050668
Keywords
antibiotic susceptibility; Atacama Desert; Laguna Chaxa; lithium tolerance; Novobiocin resistance; osmoregulation; Staphylococcus sciuri; Salar de Atacama
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Funding
- CONICYT Chile [CeBiB FB-0001]
- Universidad de Antofagasta, Semillero de Investigacion [5305]
- Universidad de Antofagasta, Chile
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In addition to the industrial and biomedical applications of lithium, information on the tolerance of microorganisms to high Li concentrations in natural biological systems is limited. Strain LCHXa is a novel free-living Gram-positive, non-motile bacterium strain isolated from water samples taken at Laguna Chaxa, a non-industrial water body with the highest soluble Li content (33 mM LiCl) within the Salar de Atacama basin in northern Chile. Enrichment was conducted in Luria-Bertani (LB) medium supplemented with 1 M LiCl. Strain LCHXa was a Novobiocin-resistant and coagulase negative Staphylococcus. Phylogenetically, strain LCHXa belongs to the species Staphylococcussciuri. Strain LCHXa grew optimally in LB medium at pH 6-8 and 37 degrees C, and it was able to sustain growth at molar Li concentrations at 2 M LiCl, with a decrease in the specific growth rate of 85%. Osmoregulation in strain LCHXa partially involves glycine betaine and glycerol as compatible solutes.
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