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UV-resistant yeasts isolated from a high-altitude volcanic area on the Atacama Desert as eukaryotic models for astrobiology.

Pulschen AA, Rodrigues F, Duarte RT, Araujo GG, Santiago IF, Paulino-Lima IG, Rosa CA, Kato MJ, Pellizari VH, Galante D - Microbiologyopen (2015)

Bottom Line: To our knowledge, this is the first report of these yeasts in the Atacama Desert.The presence of pigments, analyzed by Raman spectroscopy, correlated with UV resistance in some cases, but there is evidence that, on the natural environment, other molecular mechanisms may be as important as pigmentation, which has implications for the search of spectroscopic biosignatures on planetary surfaces.Due to the extreme tolerances of the isolated yeasts, these organisms represent interesting eukaryotic models for astrobiological purposes.

View Article: PubMed Central - PubMed

Affiliation: Chemistry Institute, Universidade de São Paulo, São Paulo, Brazil.

No MeSH data available.


Related in: MedlinePlus

Location of Sairecabur volcano, in the Atacama Desert, Chile (A). At the time of the sample collection, temperatures were below the freezing point and some areas of the volcano were covered with snow (B and C).
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fig01: Location of Sairecabur volcano, in the Atacama Desert, Chile (A). At the time of the sample collection, temperatures were below the freezing point and some areas of the volcano were covered with snow (B and C).

Mentions: Samples were collected from the top layer of soil at three different sites of the Sairecabur volcano, Atacama Desert (Fig.1), in January 2012, using sterile tools, placed in sterile 50 mL tubes, sealed and kept refrigerated until the analysis. The three soil samples used in this work were collected in the following sites (latitude, longitude and altitude, respectively): S5047 (soil from volcano slope) = 22.716945°S/67.923690°W/5047 m; S3981 (soil from volcano slope) = 22.706917°S/67.996050°W/3981 m; S4823 (sulfur-rich soil) = 22.715898°S/67.933632°W/4823 m.


UV-resistant yeasts isolated from a high-altitude volcanic area on the Atacama Desert as eukaryotic models for astrobiology.

Pulschen AA, Rodrigues F, Duarte RT, Araujo GG, Santiago IF, Paulino-Lima IG, Rosa CA, Kato MJ, Pellizari VH, Galante D - Microbiologyopen (2015)

Location of Sairecabur volcano, in the Atacama Desert, Chile (A). At the time of the sample collection, temperatures were below the freezing point and some areas of the volcano were covered with snow (B and C).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4554453&req=5

fig01: Location of Sairecabur volcano, in the Atacama Desert, Chile (A). At the time of the sample collection, temperatures were below the freezing point and some areas of the volcano were covered with snow (B and C).
Mentions: Samples were collected from the top layer of soil at three different sites of the Sairecabur volcano, Atacama Desert (Fig.1), in January 2012, using sterile tools, placed in sterile 50 mL tubes, sealed and kept refrigerated until the analysis. The three soil samples used in this work were collected in the following sites (latitude, longitude and altitude, respectively): S5047 (soil from volcano slope) = 22.716945°S/67.923690°W/5047 m; S3981 (soil from volcano slope) = 22.706917°S/67.996050°W/3981 m; S4823 (sulfur-rich soil) = 22.715898°S/67.933632°W/4823 m.

Bottom Line: To our knowledge, this is the first report of these yeasts in the Atacama Desert.The presence of pigments, analyzed by Raman spectroscopy, correlated with UV resistance in some cases, but there is evidence that, on the natural environment, other molecular mechanisms may be as important as pigmentation, which has implications for the search of spectroscopic biosignatures on planetary surfaces.Due to the extreme tolerances of the isolated yeasts, these organisms represent interesting eukaryotic models for astrobiological purposes.

View Article: PubMed Central - PubMed

Affiliation: Chemistry Institute, Universidade de São Paulo, São Paulo, Brazil.

No MeSH data available.


Related in: MedlinePlus