ArticleExtremophiles : life under extreme conditions2013
UV and cold tolerance of a pigment-producing Antarctic Janthinobacterium sp. Ant5-2.
Article in Extremophiles : life under extreme conditions, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 45 citations in OpenAlex.
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- Whole-genome sequencing of aMicrobiology resource announcements · 2024Article
- Endophytic Bacterial Biofilm-Formers Associated with Antarctic Vascular Plants.Microorganisms · 2024Article
- Plumage microorganism communities of tidal marsh sparrows.iScience · 2024Article
- Genomic basis of environmental adaptation in the widespread poly-extremophilic Exiguobacterium group.The ISME journal · 2024Article
- Diverse Repertoire and Relationship of Exopolysaccharide Genes in Cold-AdaptedMicroorganisms · 2023Article
- Environmental distribution and genomic characteristics ofFrontiers in microbiology · 2023Article
- Purification, Identification, and Properties of a Novel Carotenoid Produced byAntioxidants (Basel, Switzerland) · 2022Article
- Multiple Adaptive Strategies of HimalayanFrontiers in microbiology · 2022Article
- Production and antiproliferative effect of violacein, a purple pigment produced by an Antarctic bacterial isolate.World journal of microbiology & biotechnology · 2020Article
- Pigment production by cold-adapted bacteria and fungi: colorful tale of cryosphere with wide range applications.Extremophiles : life under extreme conditions · 2020Review
- Factors determining microbial colonization of liquid nitrogen storage tanks used for archiving biological samples.Applied microbiology and biotechnology · 2020Article
- Living at the Extremes: Extremophiles and the Limits of Life in a Planetary Context.Frontiers in microbiology · 2019Review
- Genome Sequence of Janthinobacterium sp. CG23_2, a Violacein-Producing Isolate from an Antarctic Supraglacial Stream.Genome announcements · 2016Article
- Draft Genome Sequence of Janthinobacterium sp. Ant5-2-1, Isolated from Proglacial Lake Podprudnoye in the Schirmacher Oasis of East Antarctica.Genome announcements · 2016Article
- Bacterial composition of soils of the Lake Wellman area, Darwin Mountains, Antarctica.Extremophiles : life under extreme conditions · 2013Article
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In this paper, we describe the UV and cold tolerance of a purple violet pigment (PVP)-producing Antarctic bacterium, Janthinobacterium sp. Ant5-2 (PVP(+)) and compared its physiological adaptations with a pigmentless mutant strain (PVP(-)). A spontaneous deletion of vioA that codes for tryptophan monooxygenase, the first gene involved in the biosynthesis of PVP was found in PVP(-) strain. The PVP(-) culture exhibited significantly reduced survival during exponential and stationary growth phase following exposure to UVB (320 nm) and UVC (254 nm) (dose range: 0-300 J/m²) when compared to wild-type (PVP(+)) cultures. In addition, upon biochemical inhibition of pigment synthesis by 2(5H)-furanone, wild-type PVP(+) cultures exhibited approximately 50-fold growth reduction at a higher dose (300 J/m²) of UV. Increased resistance to UV was observed upon inducing starvation state in both PVP(+) and PVP(-) cultures. There was 80% (SD = ±8) reduction in extrapolymeric substance (EPS) production in the PVP(-) cultures along with a compromised survival to freeze-thaw cycles when compared to the PVP(+) cultures. Perhaps synthesis of PVP and EPS are among the key adaptive features that define the survival of this bacterium in Antarctic extreme conditions, especially during austral summer months.
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