AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI
În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului.
Autori: CECILIA M. CHIRIAC, LUCIAN BARBU-TUDORAN, ANDREEA BARICZ, EDINA SZEKERES, TIBERIU SZOKE-NAGY, NICOLAE DRAGOȘ, CRISTIAN COMAN.
Some of the oldest evidence of life on Earth comes from microbialites, or biologically induced carbonate deposits. Modern lithified microbial mats are considered analogues to some of the earliest Archaean ecosystems. This study investigated the bacterial diversity in a microbial mat developed on the surface of a hot spring carbonate deposit from Romania. A clone library was constructed and more than 200 partial 16S rRNA gene sequences were obtained. Phylogenetic analysis showed the existence of nine major groups. Gammaproteobacteria, Cyanobacteria and Betaproteobacteria were dominant, comprising 75% of the clone library. Verrucomicrobia, some Cyanobacteria (Phormidium, Oscillatoria and Leptolyngbya), Chloroflexi, Firmicutes and Deltaproteobacteria taxa observed in the investigated mat are common inhabitants of this type of environments. Arthrospira platensis and Desertifilum tharense (Cyanobacteria) were described for the first time in association with a geothermal habitat. Also, the representatives of Gammaproteobacteria, Betaproteobacteria, Bacteroidetes and Chrysiogenetes identified in the mat have not been described in geothermal habitats, but are known to prevail in saline, neutral to alkaline environments.
Keywords: bacterial diversity, community structure, cyanobacterial mat, hot springs.
Corresponding author: Cristian Coman, Institute of Biological Research, 48 Republicii Street, 400015 Cluj-Napoca, Romania, Email: cristian.coman@icbcluj.ro
