Bu çalışmada Sivas’ta bulunan farklı solar tuzlalardan halofilik mikroorganizmaların izolasyonu yapılmıştır ve elde edilen izolatların 16S rRNA gen analizine dayalı karakterizasyonu gerçekleştirilmiştir. İzolasyon işlemi farklı tuz konsantrasyonları ile hazırlanmış 5 farklı besiyeri ile gerçekleştirilmiştir. Morfolojik olarak farklılık gösteren kolonilerin 16S rRNA genleri ARDRA ile analiz edilmiştir ve kesim profilleri karşılaştırılmıştır. 47 adet suş tanımlama amacıyla seçilmiştir. Bacteria domaini içerisinde yer alan izolatların Idiomarina, Salinivibrio, Halomonas, Salinibacter, Gracilibacillus, Thalassobacillus, Aliifodinibius, Chromohalobacter, Planococcus, Marinobacter, Bacillus, Aquisalimonas, Marinococcus, Alkalibacillus, Kangiella ve Microbulbifer cinsleri ile filogenetik olarak ilişkili olduğu saptanmıştır. Halofilik arke izolatları ise Haloferax, Natrinema, Haloterrigena, Halopelagius, Halorhabdus ve Haloarcula cinsleri içerisinde dağılım göstermiştir.
Microbial diversity, same as mineral deposits has been evaluated to be among the underground riches of a country. New data on microbial diversity are thought to be of potential economic value. Acid drainage waters are characterized by low pH and high concentrations of metals. Therefore, these acidic habitats are perfect places for quantitative and genomic-based analyses related to microbial ecology and community functions. The samplings were collected from the Kahramanmaras. The microbiological and molecular techniques were applied to determine the acidophilic community of these regions. Water samples were rich in iron (808.2 ppm, 1086.6 ppm, 2264.7 ppm), gold (1.4 ppm, 1.6 ppm, 2.5 ppm), aluminum (218.5 ppm, 265.5 ppm, 464.3 ppm), manganese (994.1 ppm, 945.6 ppm, 1643.4 ppm), sulfur (3432 ppm, 3971 ppm, 6399 ppm) and zinc (93.9 ppm, 10.8 ppm, 169.5 ppm), respectively for three seasons. The isolates were obtained as Acidiphilium sp., Acidithiobacillus sp., and Leptospirillum ferrooxidans. The predominant bacteria were found to be the members of Acidiphilium, Metallibacterium, Acidithiobacillus, Leptospirillum genera according to the results of the community fingerprint and clone library. 16S amplicon sequencing was analyzed and the diversity results were given at the genus level. Combined culture-dependent and culture-independent techniques were used to identify indigenous bacteria in the iron-rich acid mine ponds. The chemolithotrophic and heterotrophic acidophiles were isolated.
The aim of this study is to reveal the ability of utilizing different aromatic hydrocarbons (p-hydroxybenzoic acid, naphthalene, phenanthrene, and pyrene) by a halotolerant bacterial strain, Chromohalobacter sp., under saline conditions. The aromatic hydrocarbon degradation pathways were identified. PCR amplification was carried to define the gene zones which codify the dioxygenases of the isolates. The possible gene zones of catechol 1, 2 dioxygenase and protocatechuate 3, and 4 dioxygenase were determined. According to the PCR amplification and enzyme test results Chromohalobacter sp. utilizes aromatic hydrocarbons by the ortho cleavage of the s-ketoadipate pathway. In this study, it was concluded that this isolate can be used in bioremediation studies of saline environments contaminated with aromatic hydrocarbons.
Knowledge of the functions, interactions, and diversity of extremely halophilic microorganisms mostly comes from the results of studies performed in different salterns throughout the world. As model habitats, salterns allow the comparison of different techniques used for qualitative and quantitative analysis of halophilic communities in these hypersaline environments. Çamaltı Saltern is the biggest coastal solar saltern located on the Aegean coast of Turkey, and it produces most of the salt consumed in the country. In the present study, detection of prokaryotic communities of the Çamaltı Saltern was performed using 2 culture-independent methods. Real-time polymerase chain reaction (RT-PCR) and fluorescein in situ hybridization (FISH) techniques were evaluated to analyze the microbial populations of Çamaltı Saltern. Of the Çamaltı samples, 48% to 67% were hybridized with the EUB338 probe and 33% to 57% were hybridized with the ARC915 probe. Repeatability of the RT-PCR experiments with environmental DNA was considered insufficient. However, FISH analysis may be combined with RT-PCR and these 2 techniques may be used in tandem to rapidly reveal quantitative aspects of the microbial population of hypersaline environments.
Abstract Boron is a vital micronutrient for the growth of plants and different organisms. However, boron may be toxic to living cells at high concentrations. Nevertheless, microorganisms can be grown in harsh conditions such as environments with higher boron concentrations. It is also known that boron‐tolerant microorganisms have significant biotechnological potentials. In this study, it is aimed to isolate microorganism from a boron containing place in Kırka, Eskişehir using culture‐dependent methods. After extracting genomic DNAs, Amplified Ribosomal DNA Restriction Analysis (ARDRA) profiles were constructed with Hae III, Msp I, Hinf I‐ Hpa II and Alu I‐ Cfo I. Sequence analyses were performed by chain‐terminating method. Consensus sequences were completed and similarities were determined by RDP Release 11. According to ARDRA, 10 profiles and five different species such as Pseudomonas sp., Enterecoccus sp., Acinetobacter sp., Bacillus sp. and Halomonas sp. were identified.