Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert.
The carbon metabolism of the cryptoendolithic microbiota of sandstones from the Ross Desert of Antarctica was studied in situ and in vitro. Organic and inorganic carbon compounds were metabolized by the microbiota, with bicarbonate incorporation into community lipids occurring primarily in the light...
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ftpubmed:oai:pubmedcentral.nih.gov:202580 2023-05-15T13:52:27+02:00 Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert. Vestal, J R 1988-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC202580 http://www.ncbi.nlm.nih.gov/pubmed/11536604 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC202580 http://www.ncbi.nlm.nih.gov/pubmed/11536604 Research Article Text 1988 ftpubmed 2013-08-29T14:14:19Z The carbon metabolism of the cryptoendolithic microbiota of sandstones from the Ross Desert of Antarctica was studied in situ and in vitro. Organic and inorganic carbon compounds were metabolized by the microbiota, with bicarbonate incorporation into community lipids occurring primarily in the light. Light intensity affected the photometabolism of carbon with a photosynthesis-intensity response optimum at about 200 to 300 micromoles of photons per m2 per s. Photosynthesis was also affected by temperature, with a minimum activity at -5 degrees C, an optimum activity at 15 degrees C, and complete inhibition at 35 degrees C, indicating that the cryptoendolithic community was psychrophilic. The primary source of CO2 for photosynthesis in situ was the atmosphere. CO2 may also be photometabolized by using the carbon produced from respiration within the endolithic community. Photosynthesis occurred maximally when the microbiota was wet with liquid water and to a lesser extent in a humid atmosphere. This simple microbial community, therefore, exists under extremes of water, light, and temperature stress which affect and control its metabolism. Text Antarc* Antarctic Antarctica PubMed Central (PMC) Antarctic The Antarctic |
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Research Article Vestal, J R Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert. |
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Research Article |
description |
The carbon metabolism of the cryptoendolithic microbiota of sandstones from the Ross Desert of Antarctica was studied in situ and in vitro. Organic and inorganic carbon compounds were metabolized by the microbiota, with bicarbonate incorporation into community lipids occurring primarily in the light. Light intensity affected the photometabolism of carbon with a photosynthesis-intensity response optimum at about 200 to 300 micromoles of photons per m2 per s. Photosynthesis was also affected by temperature, with a minimum activity at -5 degrees C, an optimum activity at 15 degrees C, and complete inhibition at 35 degrees C, indicating that the cryptoendolithic community was psychrophilic. The primary source of CO2 for photosynthesis in situ was the atmosphere. CO2 may also be photometabolized by using the carbon produced from respiration within the endolithic community. Photosynthesis occurred maximally when the microbiota was wet with liquid water and to a lesser extent in a humid atmosphere. This simple microbial community, therefore, exists under extremes of water, light, and temperature stress which affect and control its metabolism. |
format |
Text |
author |
Vestal, J R |
author_facet |
Vestal, J R |
author_sort |
Vestal, J R |
title |
Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert. |
title_short |
Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert. |
title_full |
Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert. |
title_fullStr |
Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert. |
title_full_unstemmed |
Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert. |
title_sort |
carbon metabolism of the cryptoendolithic microbiota from the antarctic desert. |
publishDate |
1988 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC202580 http://www.ncbi.nlm.nih.gov/pubmed/11536604 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC202580 http://www.ncbi.nlm.nih.gov/pubmed/11536604 |
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1766256737712603136 |