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...
Published in: | Applied and Environmental Microbiology |
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Language: | English |
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American Society for Microbiology
1988
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Online Access: | http://dx.doi.org/10.1128/aem.54.4.960-965.1988 https://journals.asm.org/doi/pdf/10.1128/aem.54.4.960-965.1988 |
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crasmicro:10.1128/aem.54.4.960-965.1988 2023-11-05T03:36:41+01:00 Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert Vestal, J R 1988 http://dx.doi.org/10.1128/aem.54.4.960-965.1988 https://journals.asm.org/doi/pdf/10.1128/aem.54.4.960-965.1988 en eng American Society for Microbiology https://journals.asm.org/non-commercial-tdm-license Applied and Environmental Microbiology volume 54, issue 4, page 960-965 ISSN 0099-2240 1098-5336 Ecology Applied Microbiology and Biotechnology Food Science Biotechnology journal-article 1988 crasmicro https://doi.org/10.1128/aem.54.4.960-965.1988 2023-10-09T16:05:41Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica ASM Journals (American Society for Microbiology - via Crossref) Applied and Environmental Microbiology 54 4 960 965 |
institution |
Open Polar |
collection |
ASM Journals (American Society for Microbiology - via Crossref) |
op_collection_id |
crasmicro |
language |
English |
topic |
Ecology Applied Microbiology and Biotechnology Food Science Biotechnology |
spellingShingle |
Ecology Applied Microbiology and Biotechnology Food Science Biotechnology Vestal, J R Carbon metabolism of the cryptoendolithic microbiota from the Antarctic desert |
topic_facet |
Ecology Applied Microbiology and Biotechnology Food Science Biotechnology |
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 |
Article in Journal/Newspaper |
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 |
publisher |
American Society for Microbiology |
publishDate |
1988 |
url |
http://dx.doi.org/10.1128/aem.54.4.960-965.1988 https://journals.asm.org/doi/pdf/10.1128/aem.54.4.960-965.1988 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Applied and Environmental Microbiology volume 54, issue 4, page 960-965 ISSN 0099-2240 1098-5336 |
op_rights |
https://journals.asm.org/non-commercial-tdm-license |
op_doi |
https://doi.org/10.1128/aem.54.4.960-965.1988 |
container_title |
Applied and Environmental Microbiology |
container_volume |
54 |
container_issue |
4 |
container_start_page |
960 |
op_container_end_page |
965 |
_version_ |
1781691778941845504 |