In situ response of Nostoc commune s.l. colonies to desiccation in Central Svalbard, Norwegian High Arctic
The effects of desiccation on photochemical processes and nitrogenase activity was evaluated in Nostoc commune s.l. colonies from a wet thufur meadow in Svalbard. The colonies were subjected to slow desiccation at low temperature and low irradiance and the protochemical processes were measured using...
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ftczacademyscien:oai:asep.lib.cas.cz:CavUnEpca/0365238 2024-02-04T09:57:46+01:00 In situ response of Nostoc commune s.l. colonies to desiccation in Central Svalbard, Norwegian High Arctic Kvíderová, J. (Jana) Elster, J. (Josef) Šimek, M. (Miloslav) 2011 http://hdl.handle.net/11104/0200525 eng eng urn:pissn: 1802-5439 urn:eissn: 1805-4927 http://hdl.handle.net/11104/0200525 desiccation cyanobacteria Arctic info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2011 ftczacademyscien 2024-01-09T17:18:15Z The effects of desiccation on photochemical processes and nitrogenase activity was evaluated in Nostoc commune s.l. colonies from a wet thufur meadow in Svalbard. The colonies were subjected to slow desiccation at low temperature and low irradiance and the protochemical processes were measured using variable chlorophyll fluorescence and the nitrogenase activity using acetylene-ethylene reduction assay. No changes in colony shape was observed till the colony lost 30% of its fully-hydrated state weight (original weight) and such partly-hydrated state could be even beneficial due to better difusion of CO2 and N2 into cells. Even loss of 50% of the original weight did not affect the metabolical processes. The nitrogeanse activity was not detectable when the colony lost 80 % of its original weight and the photochemistry ceased when the colony lost more than 90 % of its original weight indicating thus good adaptation to water fluctuation and desiccation in situ. Article in Journal/Newspaper Arctic Svalbard The Czech Academy of Sciences: Publication Activity (ASEP) Arctic Svalbard |
institution |
Open Polar |
collection |
The Czech Academy of Sciences: Publication Activity (ASEP) |
op_collection_id |
ftczacademyscien |
language |
English |
topic |
desiccation cyanobacteria Arctic |
spellingShingle |
desiccation cyanobacteria Arctic Kvíderová, J. (Jana) Elster, J. (Josef) Šimek, M. (Miloslav) In situ response of Nostoc commune s.l. colonies to desiccation in Central Svalbard, Norwegian High Arctic |
topic_facet |
desiccation cyanobacteria Arctic |
description |
The effects of desiccation on photochemical processes and nitrogenase activity was evaluated in Nostoc commune s.l. colonies from a wet thufur meadow in Svalbard. The colonies were subjected to slow desiccation at low temperature and low irradiance and the protochemical processes were measured using variable chlorophyll fluorescence and the nitrogenase activity using acetylene-ethylene reduction assay. No changes in colony shape was observed till the colony lost 30% of its fully-hydrated state weight (original weight) and such partly-hydrated state could be even beneficial due to better difusion of CO2 and N2 into cells. Even loss of 50% of the original weight did not affect the metabolical processes. The nitrogeanse activity was not detectable when the colony lost 80 % of its original weight and the photochemistry ceased when the colony lost more than 90 % of its original weight indicating thus good adaptation to water fluctuation and desiccation in situ. |
format |
Article in Journal/Newspaper |
author |
Kvíderová, J. (Jana) Elster, J. (Josef) Šimek, M. (Miloslav) |
author_facet |
Kvíderová, J. (Jana) Elster, J. (Josef) Šimek, M. (Miloslav) |
author_sort |
Kvíderová, J. (Jana) |
title |
In situ response of Nostoc commune s.l. colonies to desiccation in Central Svalbard, Norwegian High Arctic |
title_short |
In situ response of Nostoc commune s.l. colonies to desiccation in Central Svalbard, Norwegian High Arctic |
title_full |
In situ response of Nostoc commune s.l. colonies to desiccation in Central Svalbard, Norwegian High Arctic |
title_fullStr |
In situ response of Nostoc commune s.l. colonies to desiccation in Central Svalbard, Norwegian High Arctic |
title_full_unstemmed |
In situ response of Nostoc commune s.l. colonies to desiccation in Central Svalbard, Norwegian High Arctic |
title_sort |
in situ response of nostoc commune s.l. colonies to desiccation in central svalbard, norwegian high arctic |
publishDate |
2011 |
url |
http://hdl.handle.net/11104/0200525 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Svalbard |
genre_facet |
Arctic Svalbard |
op_relation |
urn:pissn: 1802-5439 urn:eissn: 1805-4927 http://hdl.handle.net/11104/0200525 |
_version_ |
1789962095370960896 |