Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient
The endemic Antarctic brown macroalga Desmarestia anceps colonizes the subtidal between 5 and 30 m in Potter Cove on King George Island (South Shetland Islands, Antarctica). Experiments were conducted to study photosynthetic activities, antioxidative enzymes and UV tolerance of field-grown individua...
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ftawi:oai:epic.awi.de:44704 2023-05-15T13:40:28+02:00 Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient Rautenberger, Ralf Wiencke, Christian Bischof, Kai 2013 https://epic.awi.de/id/eprint/44704/ https://doi.org/10.1007/s00300-013-1397-2 https://hdl.handle.net/10013/epic.50949 unknown Springer Rautenberger, R. , Wiencke, C. and Bischof, K. (2013) Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient , Polar Biology, 36 (12), pp. 1779-1789 . doi:10.1007/s00300-013-1397-2 <https://doi.org/10.1007/s00300-013-1397-2> , hdl:10013/epic.50949 EPIC3Polar Biology, Springer, 36(12), pp. 1779-1789, ISSN: 0722-4060 Article isiRev 2013 ftawi https://doi.org/10.1007/s00300-013-1397-2 2021-12-24T15:43:00Z The endemic Antarctic brown macroalga Desmarestia anceps colonizes the subtidal between 5 and 30 m in Potter Cove on King George Island (South Shetland Islands, Antarctica). Experiments were conducted to study photosynthetic activities, antioxidative enzymes and UV tolerance of field-grown individuals with respect to the light histories along different subtidal positions. Individuals collected from the upper (5.5 m) and mid-subtidal (9.0 m) are characterized by high maximum electron transport rates (ETRmax) measured by PAM-fluorometry and high activities of superoxide dismutase (SOD) supported by considerable activities of glutathione reductase. Individuals of this species from the upper subtidal are able to tolerate high irradiances of UV-B radiation because its photosynthetic apparatus is putatively well protected by phlorotannins. In contrast, individuals from lower subtidal positions (13.5 and 15.5 m) showed an opposite trend: lower ETRmax and SOD activities as well as a lower UV tolerance of photosynthesis. Moreover, a non-denaturing polyacrylamide gel electrophoresis (native PAGE) of a partially purified crude extract reveals that D. anceps has probably six isoforms of SOD. These intra-specific patterns imply a high phenotypical plasticity of D. anceps with respect to its photosynthesis and photoprotective mechanisms. Overall, photosynthesis, UV tolerance and antioxidative potential are highly regulated in D. anceps corresponding to the respective light regimes along its natural growth sites. Article in Journal/Newspaper Antarc* Antarctic Antarctica King George Island Polar Biology South Shetland Islands Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic King George Island Potter Cove South Shetland Islands Polar Biology 36 12 1779 1789 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The endemic Antarctic brown macroalga Desmarestia anceps colonizes the subtidal between 5 and 30 m in Potter Cove on King George Island (South Shetland Islands, Antarctica). Experiments were conducted to study photosynthetic activities, antioxidative enzymes and UV tolerance of field-grown individuals with respect to the light histories along different subtidal positions. Individuals collected from the upper (5.5 m) and mid-subtidal (9.0 m) are characterized by high maximum electron transport rates (ETRmax) measured by PAM-fluorometry and high activities of superoxide dismutase (SOD) supported by considerable activities of glutathione reductase. Individuals of this species from the upper subtidal are able to tolerate high irradiances of UV-B radiation because its photosynthetic apparatus is putatively well protected by phlorotannins. In contrast, individuals from lower subtidal positions (13.5 and 15.5 m) showed an opposite trend: lower ETRmax and SOD activities as well as a lower UV tolerance of photosynthesis. Moreover, a non-denaturing polyacrylamide gel electrophoresis (native PAGE) of a partially purified crude extract reveals that D. anceps has probably six isoforms of SOD. These intra-specific patterns imply a high phenotypical plasticity of D. anceps with respect to its photosynthesis and photoprotective mechanisms. Overall, photosynthesis, UV tolerance and antioxidative potential are highly regulated in D. anceps corresponding to the respective light regimes along its natural growth sites. |
format |
Article in Journal/Newspaper |
author |
Rautenberger, Ralf Wiencke, Christian Bischof, Kai |
spellingShingle |
Rautenberger, Ralf Wiencke, Christian Bischof, Kai Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient |
author_facet |
Rautenberger, Ralf Wiencke, Christian Bischof, Kai |
author_sort |
Rautenberger, Ralf |
title |
Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient |
title_short |
Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient |
title_full |
Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient |
title_fullStr |
Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient |
title_full_unstemmed |
Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient |
title_sort |
acclimation to uv radiation and antioxidative defence in the endemic antarctic brown macroalga desmarestia anceps along a depth gradient |
publisher |
Springer |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/44704/ https://doi.org/10.1007/s00300-013-1397-2 https://hdl.handle.net/10013/epic.50949 |
geographic |
Antarctic King George Island Potter Cove South Shetland Islands |
geographic_facet |
Antarctic King George Island Potter Cove South Shetland Islands |
genre |
Antarc* Antarctic Antarctica King George Island Polar Biology South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctica King George Island Polar Biology South Shetland Islands |
op_source |
EPIC3Polar Biology, Springer, 36(12), pp. 1779-1789, ISSN: 0722-4060 |
op_relation |
Rautenberger, R. , Wiencke, C. and Bischof, K. (2013) Acclimation to UV radiation and antioxidative defence in the endemic Antarctic brown macroalga Desmarestia anceps along a depth gradient , Polar Biology, 36 (12), pp. 1779-1789 . doi:10.1007/s00300-013-1397-2 <https://doi.org/10.1007/s00300-013-1397-2> , hdl:10013/epic.50949 |
op_doi |
https://doi.org/10.1007/s00300-013-1397-2 |
container_title |
Polar Biology |
container_volume |
36 |
container_issue |
12 |
container_start_page |
1779 |
op_container_end_page |
1789 |
_version_ |
1766135574814523392 |