title: Characterization of halophilic bacterial communities in Turda Salt Mine (Romania).
abstract: Halophilic organisms are having adaptations to extreme salinity, the majority of them being Archaean, which have the ability to grow at extremely high salt concentrations, (from 3 % to 35 %). Level of salinity causes natural fluctuations in the halophilic populations that inhabit this particular habitat, raising problems in maintaining homeostasis of the osmotic pressure. Samples such as salt and water taken from Turda Salt Mine were analyzed in order to identify the eco-physiological bacterial groups. Considering the number of bacteria of each eco-physiological group, the bacterial indicators of salt quality (BISQ) were calculated and studied for each sample. The phosphatase, catalase and dehydrogenases enzymatic activities were quantitatively determined and the enzymatic indicators of salt quality (EISQ) were calculated. Bacterial isolates were analyzed using 16S rRNA gene sequence analysis. Universal bacterial primers, targeting the consensus region of the bacterial 16S rRNA gene were used. Analysis of a large fragment, of 1499 bp was performed to improve discrimination at the species level.
authors.affiliation: Faculty of Biology and Geology, Department of Molecular Biology and Biotechnology, Babeş Bolyai University, Kogalniceanu St., 400084, Cluj-Napoca, Romania, k_hella@yahoo.com.
authors.forename: Rahela
authors.initials: R
authors.lastname: Carpa
authors.forename: Anca
authors.initials: A
authors.lastname: Keul
authors.forename: Vasile
authors.initials: V
authors.lastname: Muntean
authors.forename: Cristina
authors.initials: C
authors.lastname: Dobrotă
mesh_terms: D001419:Bacteria / Q000145:classification* / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D002374:Catalase / Q000235:genetics / Q000378:metabolism; D004269:DNA, Bacterial / Q000235:genetics*; D059013:Microbial Consortia / Q000235:genetics; D008906:Mining; D010088:Oxidoreductases / Q000235:genetics / Q000378:metabolism; D010744:Phosphoric Monoester Hydrolases / Q000235:genetics / Q000378:metabolism; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics*; D012383:Romania; D054712:Salinity; D012965:Sodium Chloride / Q000494:pharmacology*
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S; D012965:Sodium Chloride; D010088:Oxidoreductases; D002374:Catalase; D010744:Phosphoric Monoester Hydrolases