Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes
Rates of carbon flux in 14 species of Antarctic bryophytes were measured under controlled conditions using an infra-red gas analysis system. The results were used to produce estimates of mode! parameters for respiration and photosynthesis. The relationships between respiration, photosynthesis, irrad...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/514455/ https://doi.org/10.1046/j.1469-8137.1997.00805.x |
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ftnerc:oai:nora.nerc.ac.uk:514455 2023-05-15T13:49:33+02:00 Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes Davey, Martin C. Rothery, Peter 1997-10 http://nora.nerc.ac.uk/id/eprint/514455/ https://doi.org/10.1046/j.1469-8137.1997.00805.x unknown Wiley Davey, Martin C.; Rothery, Peter. 1997 Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes. New Phytologist, 137 (2). 231-240. https://doi.org/10.1046/j.1469-8137.1997.00805.x <https://doi.org/10.1046/j.1469-8137.1997.00805.x> Botany Publication - Article PeerReviewed 1997 ftnerc https://doi.org/10.1046/j.1469-8137.1997.00805.x 2023-02-04T19:43:29Z Rates of carbon flux in 14 species of Antarctic bryophytes were measured under controlled conditions using an infra-red gas analysis system. The results were used to produce estimates of mode! parameters for respiration and photosynthesis. The relationships between respiration, photosynthesis, irradiance and temperature followed standard patterns. Temperature optima for gross and net photosynthesis were 10–20 and 0–20 °C respectively, suggesting that the plants were not truly psychrophilic. Photosynthesis was saturated at 30–270 μmol m−2s−1, consistent with the view that bryophytes are, physiologically, shade plants, although there was no evidence of photoinhibition over the range of irradiances tested (up to 700 μmol m−2s−1). Comparison of the results with environmental data suggests that photosynthesis is usually temperature-limited during daylight in the growing season. Therefore, any change in the temperature of the habitat could affect the productivity of the bryophytes. Rates of photosynthesis varied widely between species, and these relationships were largely maintained over the range of temperatures and irradiances tested. Photosynthetic rankings were correlated with the water availability in the plant habitats, supporting the hypothesis that water is the important factor in determining the distribution of populations in Antarctic habitats. Article in Journal/Newspaper Antarc* Antarctic Natural Environment Research Council: NERC Open Research Archive Antarctic New Phytologist 137 2 231 240 |
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Natural Environment Research Council: NERC Open Research Archive |
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Botany |
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Botany Davey, Martin C. Rothery, Peter Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes |
topic_facet |
Botany |
description |
Rates of carbon flux in 14 species of Antarctic bryophytes were measured under controlled conditions using an infra-red gas analysis system. The results were used to produce estimates of mode! parameters for respiration and photosynthesis. The relationships between respiration, photosynthesis, irradiance and temperature followed standard patterns. Temperature optima for gross and net photosynthesis were 10–20 and 0–20 °C respectively, suggesting that the plants were not truly psychrophilic. Photosynthesis was saturated at 30–270 μmol m−2s−1, consistent with the view that bryophytes are, physiologically, shade plants, although there was no evidence of photoinhibition over the range of irradiances tested (up to 700 μmol m−2s−1). Comparison of the results with environmental data suggests that photosynthesis is usually temperature-limited during daylight in the growing season. Therefore, any change in the temperature of the habitat could affect the productivity of the bryophytes. Rates of photosynthesis varied widely between species, and these relationships were largely maintained over the range of temperatures and irradiances tested. Photosynthetic rankings were correlated with the water availability in the plant habitats, supporting the hypothesis that water is the important factor in determining the distribution of populations in Antarctic habitats. |
format |
Article in Journal/Newspaper |
author |
Davey, Martin C. Rothery, Peter |
author_facet |
Davey, Martin C. Rothery, Peter |
author_sort |
Davey, Martin C. |
title |
Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes |
title_short |
Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes |
title_full |
Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes |
title_fullStr |
Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes |
title_full_unstemmed |
Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes |
title_sort |
interspecific variation in respiratory and photosynthetic parameters in antarctic bryophytes |
publisher |
Wiley |
publishDate |
1997 |
url |
http://nora.nerc.ac.uk/id/eprint/514455/ https://doi.org/10.1046/j.1469-8137.1997.00805.x |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Davey, Martin C.; Rothery, Peter. 1997 Interspecific variation in respiratory and photosynthetic parameters in Antarctic bryophytes. New Phytologist, 137 (2). 231-240. https://doi.org/10.1046/j.1469-8137.1997.00805.x <https://doi.org/10.1046/j.1469-8137.1997.00805.x> |
op_doi |
https://doi.org/10.1046/j.1469-8137.1997.00805.x |
container_title |
New Phytologist |
container_volume |
137 |
container_issue |
2 |
container_start_page |
231 |
op_container_end_page |
240 |
_version_ |
1766251546508525568 |