Novel Psychrophiles and Exopolymers from Permafrost Thaw Lake Sediments Article Swipe
Ilaria Finore
,
Adrien Vigneron
,
Warwick F. Vincent
,
Luigi Leone
,
Paola Di Donato
,
Aniello Schiano Moriello
,
Barbara Nicolaus
,
Annarita Poli
·
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.3390/microorganisms8091282
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.3390/microorganisms8091282
Thermokarst lakes are one of the most abundant types of microbial ecosystems in the circumpolar North. These shallow basins are formed by the thawing and collapse of ice-rich permafrost, with subsequent filling by snow and ice melt. Until now, permafrost thaw lakes have received little attention for isolation of microorganisms by culture-based analysis. The discovery of novel psychrophiles and their biomolecules makes these extreme environments suitable sources for the isolation of new strains, including for potential biotechnological applications. In this study, samples of bottom sediments were collected from three permafrost thaw lakes in subarctic Québec, Canada. Their diverse microbial communities were characterized by 16S rRNA gene amplicon analysis, and subsamples were cultured for the isolation of bacterial strains. Phenotypic and genetic characterization of the isolates revealed affinities to the genera Pseudomonas, Paenibacillus, Acinetobacter,Staphylococcus and Sphingomonas. The isolates were then evaluated for their production of extracellular enzymes and exopolymers. Enzymes of potential biotechnological interest included α and β-glucosidase, α and β-maltosidase, β-xylosidase and cellobiohydrolase. One isolate, Pseudomonas extremaustralis strain 2ASCA, also showed the capability to produce, in the loosely bound cell fraction, a levan-type polysaccharide with a yield of 613 mg/L of culture, suggesting its suitability as a candidate for eco-sustainable alternatives to commercial polymers.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/microorganisms8091282
- https://www.mdpi.com/2076-2607/8/9/1282/pdf?version=1604976654
- OA Status
- gold
- Cited By
- 20
- References
- 58
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W3080752641
All OpenAlex metadata
Raw OpenAlex JSON
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https://openalex.org/W3080752641Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3390/microorganisms8091282Digital Object Identifier
- Title
-
Novel Psychrophiles and Exopolymers from Permafrost Thaw Lake SedimentsWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2020Year of publication
- Publication date
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2020-08-22Full publication date if available
- Authors
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Ilaria Finore, Adrien Vigneron, Warwick F. Vincent, Luigi Leone, Paola Di Donato, Aniello Schiano Moriello, Barbara Nicolaus, Annarita PoliList of authors in order
- Landing page
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https://doi.org/10.3390/microorganisms8091282Publisher landing page
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https://www.mdpi.com/2076-2607/8/9/1282/pdf?version=1604976654Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
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https://www.mdpi.com/2076-2607/8/9/1282/pdf?version=1604976654Direct OA link when available
- Concepts
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Permafrost, Psychrophile, Extremophile, Extreme environment, Microorganism, Byssus, Subarctic climate, Microbial ecology, Biology, Ecology, Bacteria, Mussel, GeneticsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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20Total citation count in OpenAlex
- Citations by year (recent)
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2025: 4, 2024: 5, 2023: 4, 2022: 4, 2021: 3Per-year citation counts (last 5 years)
- References (count)
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58Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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