Effect of nitrogen starvation on desiccation tolerance of Arctic Microcoleus strains (cyanobacteria)
Although desiccation tolerance of Microcoleus species is a well-known phenomenon, there is very little information about their limits of desiccation tolerance in terms of cellular water content, the survival rate of their cells, and the environmental factors inducing their resistance to drying. We h...
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Online Access: | https://doi.org/10.3389/fmicb.2015.00278 http://hdl.handle.net/11104/0250697 |
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ftczacademyscien:oai:asep.lib.cas.cz:CavUnEpca/0449102 2024-02-04T09:57:35+01:00 Effect of nitrogen starvation on desiccation tolerance of Arctic Microcoleus strains (cyanobacteria) Tashyreva, D. Elster, J. (Josef) 2015 https://doi.org/10.3389/fmicb.2015.00278 http://hdl.handle.net/11104/0250697 eng eng doi:10.3389/fmicb.2015.00278 urn:pissn: 1664-302x urn:eissn: 1664-302x http://hdl.handle.net/11104/0250697 cyanobacteria desiccation tolerance viability info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2015 ftczacademyscien https://doi.org/10.3389/fmicb.2015.00278 2024-01-09T17:32:49Z Although desiccation tolerance of Microcoleus species is a well-known phenomenon, there is very little information about their limits of desiccation tolerance in terms of cellular water content, the survival rate of their cells, and the environmental factors inducing their resistance to drying. We have discovered that three Microcoleus strains, isolated from terrestrial habitats of the High Arctic, survived extensive dehydration (to 0.23 g water g-1 dry mass), but did not tolerate complete desiccation (to 0.03 g water g-1 dry mass) regardless of pre-desiccation treatments. However, these treatments were critical for the survival of incomplete desiccation: cultures grown under optimal conditions failed to survive even incomplete desiccation; a low temperature enabled only 0–15% of cells to survive, while 39.8–65.9% of cells remained alive and intact after nitrogen starvation. Unlike Nostoc, which co-exists with Microcoleus in Arctic terrestrial habitats, Microcoleus strains are not truly anhydrobiotic and do not possess constitutive desiccation tolerance. Instead, it seems that the survival strategy of Microcoleus in periodically dry habitats involves avoidance of complete desiccation, but tolerance to milder desiccation stress, which is induced by suboptimal conditions (e.g., nitrogen starvation). Article in Journal/Newspaper Arctic The Czech Academy of Sciences: Publication Activity (ASEP) Arctic Frontiers in Microbiology 6 |
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Open Polar |
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The Czech Academy of Sciences: Publication Activity (ASEP) |
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ftczacademyscien |
language |
English |
topic |
cyanobacteria desiccation tolerance viability |
spellingShingle |
cyanobacteria desiccation tolerance viability Tashyreva, D. Elster, J. (Josef) Effect of nitrogen starvation on desiccation tolerance of Arctic Microcoleus strains (cyanobacteria) |
topic_facet |
cyanobacteria desiccation tolerance viability |
description |
Although desiccation tolerance of Microcoleus species is a well-known phenomenon, there is very little information about their limits of desiccation tolerance in terms of cellular water content, the survival rate of their cells, and the environmental factors inducing their resistance to drying. We have discovered that three Microcoleus strains, isolated from terrestrial habitats of the High Arctic, survived extensive dehydration (to 0.23 g water g-1 dry mass), but did not tolerate complete desiccation (to 0.03 g water g-1 dry mass) regardless of pre-desiccation treatments. However, these treatments were critical for the survival of incomplete desiccation: cultures grown under optimal conditions failed to survive even incomplete desiccation; a low temperature enabled only 0–15% of cells to survive, while 39.8–65.9% of cells remained alive and intact after nitrogen starvation. Unlike Nostoc, which co-exists with Microcoleus in Arctic terrestrial habitats, Microcoleus strains are not truly anhydrobiotic and do not possess constitutive desiccation tolerance. Instead, it seems that the survival strategy of Microcoleus in periodically dry habitats involves avoidance of complete desiccation, but tolerance to milder desiccation stress, which is induced by suboptimal conditions (e.g., nitrogen starvation). |
format |
Article in Journal/Newspaper |
author |
Tashyreva, D. Elster, J. (Josef) |
author_facet |
Tashyreva, D. Elster, J. (Josef) |
author_sort |
Tashyreva, D. |
title |
Effect of nitrogen starvation on desiccation tolerance of Arctic Microcoleus strains (cyanobacteria) |
title_short |
Effect of nitrogen starvation on desiccation tolerance of Arctic Microcoleus strains (cyanobacteria) |
title_full |
Effect of nitrogen starvation on desiccation tolerance of Arctic Microcoleus strains (cyanobacteria) |
title_fullStr |
Effect of nitrogen starvation on desiccation tolerance of Arctic Microcoleus strains (cyanobacteria) |
title_full_unstemmed |
Effect of nitrogen starvation on desiccation tolerance of Arctic Microcoleus strains (cyanobacteria) |
title_sort |
effect of nitrogen starvation on desiccation tolerance of arctic microcoleus strains (cyanobacteria) |
publishDate |
2015 |
url |
https://doi.org/10.3389/fmicb.2015.00278 http://hdl.handle.net/11104/0250697 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
doi:10.3389/fmicb.2015.00278 urn:pissn: 1664-302x urn:eissn: 1664-302x http://hdl.handle.net/11104/0250697 |
op_doi |
https://doi.org/10.3389/fmicb.2015.00278 |
container_title |
Frontiers in Microbiology |
container_volume |
6 |
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1789961921949073408 |