Beblo-Vranesevic, Kristina and Galinski, Erwin A. and Rachel, Reinhard and Huber, Harald and Rettberg, Petra (2017) Influence of osmotic stress on desiccation and irradiation tolerance of (hyper)-thermophilic microorganisms. ARCHIVES OF MICROBIOLOGY, 199 (1). pp. 17-28. ISSN 0302-8933, 1432-072X
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This study examined the influence of prior salt adaptation on the survival rate of (hyper)-thermophilic bacteria and archaea after desiccation and UV or ionizing irradiation treatment. Survival rates after desiccation of Hydrogenothermus marinus and Archaeoglobus fulgidus increased considerably when the cells were cultivated at higher salt concentrations before drying. By doubling the concentration of NaCl, a 30 times higher survival rate of H. marinus after desiccation was observed. Under salt stress, the compatible solute diglycerol phosphate in A. fulgidus and glucosylglycerate in H. marinus accumulated in the cytoplasm. Several different compatible solutes were added as protectants to A. fulgidus and H. marinus before desiccation treatment. Some of these had similar effects as intracellularly produced compatible solutes. The survival rates of H. marinus and A. fulgidus after exposure to UV-C (254 nm) or ionizing X-ray/gamma radiation were irrespective of the salt-induced synthesis or the addition of compatible solutes.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MYO-INOSITOL-PHOSPHATE; SP-NOV REPRESENTS; HYPERTHERMOPHILE ARCHAEOGLOBUS-FULGIDUS; COMPATIBLE SOLUTES; PYROCOCCUS-FURIOSUS; IONIZING-RADIATION; OXIDIZING BACTERIA; ESCHERICHIA-COLI; ORGANIC SOLUTES; LEA PROTEINS; Compatible solutes; (Hyper)-thermophiles; Desiccation; Survival |
| Divisions: | Biology, Preclinical Medicine > Institut für Biochemie, Genetik und Mikrobiologie > Lehrstuhl für Mikrobiologie > Prof. Dr. Reinhard Rachel Biology, Preclinical Medicine > Institut für Biochemie, Genetik und Mikrobiologie > Lehrstuhl für Mikrobiologie > Prof. Dr. Dina Grohmann |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 12:58 |
| Last Modified: | 14 Feb 2019 13:11 |
| URI: | https://pred.uni-regensburg.de/id/eprint/123 |
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