Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica
Xanthoria mawsonii C. W. Dodge was found to perform well physiologically in a variety of habitats at high latitudes in continental Antarctica. The net photosynthetic rate of 7•5 μ mol CO2 kg−1 s−1 is exceptionally high for Antarctic lichens. Field and laboratory measurements proved the photosyntheti...
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ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/955 2023-07-30T03:58:07+02:00 Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica Pannewitz, Stefan Green, T.G. Allan Schlensog, Mark Seppelt, Rodney D. Sancho, Leopoldo G. Schroeter, Burkhard 2006 application/pdf https://hdl.handle.net/10289/955 https://doi.org/10.1017/S0024282905005384 en eng Cambridge University Press http://journals.cambridge.org/action/displayJournal?jid=LIC The Lichenologist Pannewitz, S., Green, T. G. A., Schlensog, M., Seppelt, R., Sancho, L. G., & Schroeter, B. (2006). Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica. The Lichenologist, 38(01), 67-81. 0024-2829 https://hdl.handle.net/10289/955 doi:10.1017/S0024282905005384 This article is published in the journal, The Lichenologist. Copyright © British Lichen Society 2005. chlorophyll a fluorescence lichens photosynthesis temperature water content Journal Article 2006 ftunivwaikato https://doi.org/10.1017/S0024282905005384 2023-07-11T17:21:18Z Xanthoria mawsonii C. W. Dodge was found to perform well physiologically in a variety of habitats at high latitudes in continental Antarctica. The net photosynthetic rate of 7•5 μ mol CO2 kg−1 s−1 is exceptionally high for Antarctic lichens. Field and laboratory measurements proved the photosynthetic apparatus to be highly adapted to strong irradiance. The cold resistance of the photosystem II reaction centres is higher than the photosynthetic CO2 fixation process. Optimum temperature for net photosynthesis was c. 10°C. The lichen grows along water channels where it is frequently inundated and hydrated to maximum water content, although net photosynthesis is strongly depressed by super saturation. In these habitats the lichen is photosynthetically active for long periods of time. Xanthoria mawsonii also grows at sites where it depends entirely on the early spring snow melt and occasional snow fall for moisture. It has an exceptionally short reactivation phase and is able to utilize snow immediately. Recovery of activity by absorbing water vapour from air, though practically possible, seems to be of ecological importance only under snow at subzero temperatures. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea The University of Waikato: Research Commons Antarctic Ross Sea The Lichenologist 38 1 67 81 |
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Open Polar |
collection |
The University of Waikato: Research Commons |
op_collection_id |
ftunivwaikato |
language |
English |
topic |
chlorophyll a fluorescence lichens photosynthesis temperature water content |
spellingShingle |
chlorophyll a fluorescence lichens photosynthesis temperature water content Pannewitz, Stefan Green, T.G. Allan Schlensog, Mark Seppelt, Rodney D. Sancho, Leopoldo G. Schroeter, Burkhard Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica |
topic_facet |
chlorophyll a fluorescence lichens photosynthesis temperature water content |
description |
Xanthoria mawsonii C. W. Dodge was found to perform well physiologically in a variety of habitats at high latitudes in continental Antarctica. The net photosynthetic rate of 7•5 μ mol CO2 kg−1 s−1 is exceptionally high for Antarctic lichens. Field and laboratory measurements proved the photosynthetic apparatus to be highly adapted to strong irradiance. The cold resistance of the photosystem II reaction centres is higher than the photosynthetic CO2 fixation process. Optimum temperature for net photosynthesis was c. 10°C. The lichen grows along water channels where it is frequently inundated and hydrated to maximum water content, although net photosynthesis is strongly depressed by super saturation. In these habitats the lichen is photosynthetically active for long periods of time. Xanthoria mawsonii also grows at sites where it depends entirely on the early spring snow melt and occasional snow fall for moisture. It has an exceptionally short reactivation phase and is able to utilize snow immediately. Recovery of activity by absorbing water vapour from air, though practically possible, seems to be of ecological importance only under snow at subzero temperatures. |
format |
Article in Journal/Newspaper |
author |
Pannewitz, Stefan Green, T.G. Allan Schlensog, Mark Seppelt, Rodney D. Sancho, Leopoldo G. Schroeter, Burkhard |
author_facet |
Pannewitz, Stefan Green, T.G. Allan Schlensog, Mark Seppelt, Rodney D. Sancho, Leopoldo G. Schroeter, Burkhard |
author_sort |
Pannewitz, Stefan |
title |
Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica |
title_short |
Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica |
title_full |
Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica |
title_fullStr |
Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica |
title_full_unstemmed |
Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica |
title_sort |
photosynthetic performance of xanthoria mawsonii c. w. dodge in coastal habitats, ross sea region, continental antarctica |
publisher |
Cambridge University Press |
publishDate |
2006 |
url |
https://hdl.handle.net/10289/955 https://doi.org/10.1017/S0024282905005384 |
geographic |
Antarctic Ross Sea |
geographic_facet |
Antarctic Ross Sea |
genre |
Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea |
op_relation |
http://journals.cambridge.org/action/displayJournal?jid=LIC The Lichenologist Pannewitz, S., Green, T. G. A., Schlensog, M., Seppelt, R., Sancho, L. G., & Schroeter, B. (2006). Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica. The Lichenologist, 38(01), 67-81. 0024-2829 https://hdl.handle.net/10289/955 doi:10.1017/S0024282905005384 |
op_rights |
This article is published in the journal, The Lichenologist. Copyright © British Lichen Society 2005. |
op_doi |
https://doi.org/10.1017/S0024282905005384 |
container_title |
The Lichenologist |
container_volume |
38 |
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67 |
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