Petrography of high-pH fluids sedimentary assemblages and biotechnological potential of sediment Bacillus

3rd International Conference on Chemo and BioInformatics, Kragujevac, September 25-26. 2025. (pp. 243-247) 

 

АУТОР(И) / AUTHOR(S): Vladimir Šaraba, Milica Ciric, Tatjana Trtić-Petrović, Violeta Gajić

 

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DOI:  10.46793/ICCBIKG25.243S

САЖЕТАК / ABSTRACT:

Serpentinization-driven high-pH fluids (pH > 11.0) represent exceedingly rare environments on Earth. Sediment samples, originating from four distinct zones of emergence of these low-mineralized springs within the Zlatibor Jurassic Ophiolitic Massif, were analyzed visually and microscopically. Sediment analysis revealed a diverse range of petrographic varieties within these relict environments. The unconsolidated clastic sediments are polymictic, consisting of pebbles with a moderately uniform size and appearance. They exhibit a coarse- grained psephitic texture, with colors ranging from brown to dark gray, with occasional hints of green. The gravel-sized fraction of the sediments consists of well- to moderately-rounded clasts, mainly ranging from 2 to 20 mm, while the poorly sorted sandy fraction ranges from fine to coarse. Additionally, an investigation of the lignocellulolytic and plastolytic potential of microorganisms from these sediments identified one Bacillus isolate of potential biotechnological interest. This isolate was able to grow on polyurethane polymers as its sole carbon source and degrade both carboxymethyl cellulose and more complex xylan substrates.

КЉУЧНЕ РЕЧИ / KEYWORDS:

unconsolidated clastic sediments; serpentinization; relict environments; lignocellulose degradation; plastolytic potential

ПРОЈЕКАТ / ACKNOWLEDGEMENT:

This research is funded by the Ministry of Science, Technological Development and Innovation of the Republic of Serbia (grant agreements No: 451-03-136/2025-03/200017 and 451-03-136/2025-03/200042), European Union’s Horizon 2020 Research and Innovation Programme (BioICEP, grant agreement No. 870292), and Science Fund of the Republic of Serbia through Project RECON TETHYS (7744807).

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