Nonmarine crenarchaeol in Nevada hot springs

Article Abstract:

The lipid extracts of the samples of microbial community biomass obtained from several alkaline neutral-pH hot springs in Nevada, United States are analyzed by high-performance liquid chromatography-mass spectrometry. The occurrence of crenarchaeol in environments counting sequences affiliated with thermophilic crenarchaeota suggests a wide phenotypic distribution of this compound.

Phenotype, Phenotypes, Microbiological research

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Thermophilic temperature optimum for crenarchaeol synthesis and its implication for archaeal evolution

Article Abstract:

The isoprenoid lipid crenarchaeol is widespread in hotsprings of California and Nevada and terrestrial and marine data together suggest a maximum relative abundance of crenarchaeol at -40 degrees Celsius. This warm temperature optimum may have facilitated colonization of the ocean by (hyper) thermophilic Archaea and the major marine radiation of Crenarchaeota.

California, Nevada, Bacterial genetics, Lipids, Structure, Chemical properties

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Isolation, characterization, and ecology of sulfur-respiring Crenarchaea inhabiting acid-sulfate-chloride-containing geothermal springs in Yellowstone National Park

Article Abstract:

The isolation, characterization, and ecology of two novel, [S.sup.0]-reducing Crenarchaea from an acid geothermal spring are reported. Both isolates are capable of cycling sulphur in acid geothermal springs throughout the Yellowstone National Park geothermal complex.

Physiological aspects, Sulfur bacteria, Sulphur bacteria, Geothermal resources

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