Non-photochemical quenching of chlorophyll fluorescence and xanthophyll cycle responses after excess PAR and UVR in Chaetoceros brevis , Phaeocystis Antarctica and coastal Antarctic phytoplankton
Sensitivity to photoinhibition from near-surface irradiance was determined in coastal phytoplankton from Potter Cove (King George Island, Antarctica) in relation to hydrographic conditions shaped by summertime meltwater influx. Slow (indicative for PSII damage) and fast (indicative for xanthophyll c...
Published in: | Marine Ecology Progress Series |
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Language: | English |
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2011
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ftnioz:oai:imis.nioz.nl:231380 2023-05-15T13:47:57+02:00 Non-photochemical quenching of chlorophyll fluorescence and xanthophyll cycle responses after excess PAR and UVR in Chaetoceros brevis , Phaeocystis Antarctica and coastal Antarctic phytoplankton van de Poll, W.H.V. Lagunas, M. de Vries, T. Buma, A. Visser, R.J.W. 2011 http://imis.nioz.nl/imis.php?module=ref&refid=231380 en eng info:eu-repo/semantics/altIdentifier/wos/000288984400009 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.3354/meps09000 http://imis.nioz.nl/imis.php?module=ref&refid=231380 info:eu-repo/semantics/closedAccess %3Ci%3EMar.+Ecol.+Prog.+Ser.+426%3C%2Fi%3E%3A+119-131.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.3354%2Fmeps09000%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.3354%2Fmeps09000%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2011 ftnioz https://doi.org/10.3354/meps09000 2022-05-01T13:58:45Z Sensitivity to photoinhibition from near-surface irradiance was determined in coastal phytoplankton from Potter Cove (King George Island, Antarctica) in relation to hydrographic conditions shaped by summertime meltwater influx. Slow (indicative for PSII damage) and fast (indicative for xanthophyll cycle activity) relaxing non-photochemical chlorophyll fluorescence quenching (NPQ) was measured during recovery from excess photosynthetically active radiation (PAR) and PAR + ultraviolet radiation (UVR) for 3 stations differentially affected by sediment influx. Additionally, assemblages were incubated outside to study xanthophyll cycle activity during PAR and PAR+UVR exposure. For comparison, NPQ and xanthophyll cycle activity were determined for high (125 mu mol photons m(-2) s(-1)) and low (20 mu mol photons m(-2) s(-1)) light acclimated Chaetoceros brevis (Bacillariophyceae) and Phaeocystis antarctica (Haptophyceae) cultures. Pigment analysis (CHEMTAX) revealed diatom dominance (average 74%) at all locations, with haptophytes being of minor importance (average 13%). All stations were stratified by a vertical density gradient, whereas sediment influx was significantly higher at the innermost station. Taxonomic composition, NPQ characteristics, and photoprotective pigment ratios were not different among stations. At the chlorophyll maximum, phytoplankton showed high light acclimation at all locations, and fast relaxing NPQ dominated after excess PAR and PAR+UVR. Samples from below the chlorophyll maximum were enriched in haptophytes, showed lower photoprotective pigment ratios, reduced capacity for NPQ, and increased contribution of slow relaxing NPQ. The photoprotective capacity of high and low light acclimated C. brevis and P. antarctica differed significantly. P. antarctica induced less NPQ and there was a stronger slow relaxing NPQ component than in the diatom, particularly after low light acclimation. Although total NPQ decreased and slow relaxing NPQ increased after UVR in field samples, NPQ and the xanthophyll cycle de-epoxidation state of cultures were not affected by UVR. A higher photoprotective capacity of diatoms over haptophytes may explain their dominance in stratified meltwater-affected coastal Antarctic waters. Article in Journal/Newspaper Antarc* Antarctic Antarctica King George Island NIOZ Repository (Royal Netherlands Institute for Sea Research) Antarctic King George Island Potter Cove Marine Ecology Progress Series 426 119 131 |
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Open Polar |
collection |
NIOZ Repository (Royal Netherlands Institute for Sea Research) |
op_collection_id |
ftnioz |
language |
English |
description |
Sensitivity to photoinhibition from near-surface irradiance was determined in coastal phytoplankton from Potter Cove (King George Island, Antarctica) in relation to hydrographic conditions shaped by summertime meltwater influx. Slow (indicative for PSII damage) and fast (indicative for xanthophyll cycle activity) relaxing non-photochemical chlorophyll fluorescence quenching (NPQ) was measured during recovery from excess photosynthetically active radiation (PAR) and PAR + ultraviolet radiation (UVR) for 3 stations differentially affected by sediment influx. Additionally, assemblages were incubated outside to study xanthophyll cycle activity during PAR and PAR+UVR exposure. For comparison, NPQ and xanthophyll cycle activity were determined for high (125 mu mol photons m(-2) s(-1)) and low (20 mu mol photons m(-2) s(-1)) light acclimated Chaetoceros brevis (Bacillariophyceae) and Phaeocystis antarctica (Haptophyceae) cultures. Pigment analysis (CHEMTAX) revealed diatom dominance (average 74%) at all locations, with haptophytes being of minor importance (average 13%). All stations were stratified by a vertical density gradient, whereas sediment influx was significantly higher at the innermost station. Taxonomic composition, NPQ characteristics, and photoprotective pigment ratios were not different among stations. At the chlorophyll maximum, phytoplankton showed high light acclimation at all locations, and fast relaxing NPQ dominated after excess PAR and PAR+UVR. Samples from below the chlorophyll maximum were enriched in haptophytes, showed lower photoprotective pigment ratios, reduced capacity for NPQ, and increased contribution of slow relaxing NPQ. The photoprotective capacity of high and low light acclimated C. brevis and P. antarctica differed significantly. P. antarctica induced less NPQ and there was a stronger slow relaxing NPQ component than in the diatom, particularly after low light acclimation. Although total NPQ decreased and slow relaxing NPQ increased after UVR in field samples, NPQ and the xanthophyll cycle de-epoxidation state of cultures were not affected by UVR. A higher photoprotective capacity of diatoms over haptophytes may explain their dominance in stratified meltwater-affected coastal Antarctic waters. |
format |
Article in Journal/Newspaper |
author |
van de Poll, W.H.V. Lagunas, M. de Vries, T. Buma, A. Visser, R.J.W. |
spellingShingle |
van de Poll, W.H.V. Lagunas, M. de Vries, T. Buma, A. Visser, R.J.W. Non-photochemical quenching of chlorophyll fluorescence and xanthophyll cycle responses after excess PAR and UVR in Chaetoceros brevis , Phaeocystis Antarctica and coastal Antarctic phytoplankton |
author_facet |
van de Poll, W.H.V. Lagunas, M. de Vries, T. Buma, A. Visser, R.J.W. |
author_sort |
van de Poll, W.H.V. |
title |
Non-photochemical quenching of chlorophyll fluorescence and xanthophyll cycle responses after excess PAR and UVR in Chaetoceros brevis , Phaeocystis Antarctica and coastal Antarctic phytoplankton |
title_short |
Non-photochemical quenching of chlorophyll fluorescence and xanthophyll cycle responses after excess PAR and UVR in Chaetoceros brevis , Phaeocystis Antarctica and coastal Antarctic phytoplankton |
title_full |
Non-photochemical quenching of chlorophyll fluorescence and xanthophyll cycle responses after excess PAR and UVR in Chaetoceros brevis , Phaeocystis Antarctica and coastal Antarctic phytoplankton |
title_fullStr |
Non-photochemical quenching of chlorophyll fluorescence and xanthophyll cycle responses after excess PAR and UVR in Chaetoceros brevis , Phaeocystis Antarctica and coastal Antarctic phytoplankton |
title_full_unstemmed |
Non-photochemical quenching of chlorophyll fluorescence and xanthophyll cycle responses after excess PAR and UVR in Chaetoceros brevis , Phaeocystis Antarctica and coastal Antarctic phytoplankton |
title_sort |
non-photochemical quenching of chlorophyll fluorescence and xanthophyll cycle responses after excess par and uvr in chaetoceros brevis , phaeocystis antarctica and coastal antarctic phytoplankton |
publishDate |
2011 |
url |
http://imis.nioz.nl/imis.php?module=ref&refid=231380 |
geographic |
Antarctic King George Island Potter Cove |
geographic_facet |
Antarctic King George Island Potter Cove |
genre |
Antarc* Antarctic Antarctica King George Island |
genre_facet |
Antarc* Antarctic Antarctica King George Island |
op_source |
%3Ci%3EMar.+Ecol.+Prog.+Ser.+426%3C%2Fi%3E%3A+119-131.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.3354%2Fmeps09000%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.3354%2Fmeps09000%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000288984400009 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.3354/meps09000 http://imis.nioz.nl/imis.php?module=ref&refid=231380 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.3354/meps09000 |
container_title |
Marine Ecology Progress Series |
container_volume |
426 |
container_start_page |
119 |
op_container_end_page |
131 |
_version_ |
1766248039282900992 |