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Vpliv znižane vodne aktivnosti na razširjenost in vrstno sestavo halofilnih gliv iz visokogorskih slanih jezer v Boliviji
ID Kastelic, Gal (Author), ID Gunde Cimerman, Nina (Mentor) More about this mentor... This link opens in a new window

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Abstract
Območja visokih planot Bolivijskih Andov, Altiplano, ki je znano po jezerih z izjemno slanostjo, posledično nizki vodni aktivnosti jezer, nizkih temperaturah, sušnosti in intenzivnem UV sevanju, ponujajo edinstveno okolje za preučevanje biodiverzitete in prilagoditvenih mehanizmov mikroorganizmov. V naši raziskavi smo osamili glive iz različnih slanih jezer Altiplana in preučevali njihovo toleranco na visoke koncentracije NaCl, MgCl2 in LiCl. Ugotovili smo, da so glive iz rodov Aspergillus, Penicillium in Cladosporium ter številne kvasovke prisotne v vseh analiziranih jezerih in sedimentih. Odkrili smo pet novih, za znanost še neznanih vrst gliv. Tri spadajo v deblo Ascomycota; ena je tolerantna na visoke koncentracije NaCl, drugi dve pa na MgCl2. Poleg tega smo identificirali eno vrsto iz reda Hypocreales, ki je tolerantna na visoke koncentracije NaCl in eno iz reda Pleosporales, ki je tolerantna na visoke koncentracije LiCl. Prav tako smo identificirali bakterije, ki uspevajo pri povišanih koncentracijah LiCl. Te so večinoma iz rodov Bacillus, Paenibacillus, Priestia in Peribacillus.

Language:Slovenian
Keywords:halotolerantne, halofilne glive, kvasovke, bakterije, NaCl, MgCl2, LiCl, bolivijski Altiplano
Work type:Bachelor thesis/paper
Organization:FKKT - Faculty of Chemistry and Chemical Technology
Year:2024
PID:20.500.12556/RUL-161285 This link opens in a new window
Publication date in RUL:09.09.2024
Views:108
Downloads:26
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Secondary language

Language:English
Title:The effect of reduced water activity on the distribution and species composition of halophilic fungi in high-altitude saline lakes in Bolivia
Abstract:
The flat high-altitude regions of the Bolivian Andes, particularly the Altiplano, known for its lakes with extreme salinity, and consequentially low water activity, low temperatures, aridity, and intense UV radiation, provide a unique environment for studying the biodiversity and adaptive mechanisms of microorganisms. In our research, we isolated halophilic fungi isolated from different Altiplano saline lakes and examined their tolerance to high concentrations of NaCl, MgCl2, and LiCl. We found that fungi from the genera Aspergillus, Penicillium, and Cladosporium, as well as many yeasts are present in all analyzed lakes and sediments. Additionally, we discovered five fungal species unknown to science. Three belong to the phylum Ascomycota; one is tolerant to high NaCl concentrations, and the other two to MgCl2. Additionally, we identified one species in the order Hypocreales that tolerates high NaCl concentrations and another in the order Pleosporales that tolerates high LiCl concentrations. We also identified bacteria that thrive at elevated concentrations of LiCl, mostly from the genera Bacillus, Paenibacillus, Priestia, and Peribacillus.

Keywords:halotolerant, halophilic, fungi, yeasts, bacteria, NaCl, MgCl2, LiCl, Bolivian Altiplano

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