Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient
In this study, we investigated the effects of salt stress (2 mM NaCl) on excitation energy transfer from light harvesting complexes to photosystem II (PS II) in two Antarctic algal species: Klebsormidium sp. and Zygnema sp. Short-term salt stress led to a significant changes in the shape of chloroph...
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ftmasarykunivojs:oai:ojs.journals.muni.cz:article/12838 2023-05-15T13:46:41+02:00 Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient Vilumbrales, David Miguel Skácelová, Kateřina Barták, Miloš 2013-06-01 application/pdf http://journals.muni.cz/CPR/article/view/12838 eng eng Masaryk Univerzity http://journals.muni.cz/CPR/article/view/12838/11170 http://journals.muni.cz/CPR/article/view/12838 Copyright (c) 2020 Czech Polar Reports https://creativecommons.org/licenses/by-nc-nd/4.0 CC-BY-NC-ND Czech Polar Reports; Vol 3 No 2 (2013); 163-172 Czech Polar Reports; Vol. 3 No. 2 (2013); 163-172 1805-0697 1805-0689 Klebsormidium sp Zygnema sp OJIP photosynthesis James Ross Island Monolith Lake info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftmasarykunivojs 2022-06-26T10:16:32Z In this study, we investigated the effects of salt stress (2 mM NaCl) on excitation energy transfer from light harvesting complexes to photosystem II (PS II) in two Antarctic algal species: Klebsormidium sp. and Zygnema sp. Short-term salt stress led to a significant changes in the shape of chlorophyll fluorescence transient (OJIP). Analyses of the polyphasic fluorescence transients (OJIP) showed that the fluorescence yield at the phases J, I and P declined considerably with the time of exposition to salt stress. In both experimental species, OJIP transients reached lowest values of chlorophyll fluorescence signal after 30/60 min. of NaCl exposition. Then, OJIP shape and chlorophyll fluo-rescence showed species-specific recovery and rised towards original values (about 2/3 of untreated control). Analyses of chlorophyll fluorescence parameters derived from OJIPs showed that salt stress led to a decrease in the maximal efficiency of PS II photo-chemistry (FV/FM) in Zygnema sp. but not Klebsormidium sp. The results indicated that the probability of excitation energy transfer before and beyond QA, and the yield of electron transport beyond QA is limited by salt-induced stress in Zygnema sp. In addition, salt stress resulted in a decrease in the photosynthetic electron transport per PS II reaction center, but both increase and decrease in the trapping per PS II reaction center was found. Performace index (PIabs) was affected negatively in Zygnema sp. but possitively Klebsormidium sp. indicating that the latter species was more resistant to salt stress than Zygnema sp. Article in Journal/Newspaper Antarc* Antarctic James Ross Island Ross Island Masaryk University Journals Antarctic Ross Island Monolith ENVELOPE(163.283,163.283,-66.950,-66.950) Monolith Lake ENVELOPE(-57.955,-57.955,-63.897,-63.897) |
institution |
Open Polar |
collection |
Masaryk University Journals |
op_collection_id |
ftmasarykunivojs |
language |
English |
topic |
Klebsormidium sp Zygnema sp OJIP photosynthesis James Ross Island Monolith Lake |
spellingShingle |
Klebsormidium sp Zygnema sp OJIP photosynthesis James Ross Island Monolith Lake Vilumbrales, David Miguel Skácelová, Kateřina Barták, Miloš Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient |
topic_facet |
Klebsormidium sp Zygnema sp OJIP photosynthesis James Ross Island Monolith Lake |
description |
In this study, we investigated the effects of salt stress (2 mM NaCl) on excitation energy transfer from light harvesting complexes to photosystem II (PS II) in two Antarctic algal species: Klebsormidium sp. and Zygnema sp. Short-term salt stress led to a significant changes in the shape of chlorophyll fluorescence transient (OJIP). Analyses of the polyphasic fluorescence transients (OJIP) showed that the fluorescence yield at the phases J, I and P declined considerably with the time of exposition to salt stress. In both experimental species, OJIP transients reached lowest values of chlorophyll fluorescence signal after 30/60 min. of NaCl exposition. Then, OJIP shape and chlorophyll fluo-rescence showed species-specific recovery and rised towards original values (about 2/3 of untreated control). Analyses of chlorophyll fluorescence parameters derived from OJIPs showed that salt stress led to a decrease in the maximal efficiency of PS II photo-chemistry (FV/FM) in Zygnema sp. but not Klebsormidium sp. The results indicated that the probability of excitation energy transfer before and beyond QA, and the yield of electron transport beyond QA is limited by salt-induced stress in Zygnema sp. In addition, salt stress resulted in a decrease in the photosynthetic electron transport per PS II reaction center, but both increase and decrease in the trapping per PS II reaction center was found. Performace index (PIabs) was affected negatively in Zygnema sp. but possitively Klebsormidium sp. indicating that the latter species was more resistant to salt stress than Zygnema sp. |
format |
Article in Journal/Newspaper |
author |
Vilumbrales, David Miguel Skácelová, Kateřina Barták, Miloš |
author_facet |
Vilumbrales, David Miguel Skácelová, Kateřina Barták, Miloš |
author_sort |
Vilumbrales, David Miguel |
title |
Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient |
title_short |
Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient |
title_full |
Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient |
title_fullStr |
Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient |
title_full_unstemmed |
Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient |
title_sort |
sensitivity of antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient |
publisher |
Masaryk Univerzity |
publishDate |
2013 |
url |
http://journals.muni.cz/CPR/article/view/12838 |
long_lat |
ENVELOPE(163.283,163.283,-66.950,-66.950) ENVELOPE(-57.955,-57.955,-63.897,-63.897) |
geographic |
Antarctic Ross Island Monolith Monolith Lake |
geographic_facet |
Antarctic Ross Island Monolith Monolith Lake |
genre |
Antarc* Antarctic James Ross Island Ross Island |
genre_facet |
Antarc* Antarctic James Ross Island Ross Island |
op_source |
Czech Polar Reports; Vol 3 No 2 (2013); 163-172 Czech Polar Reports; Vol. 3 No. 2 (2013); 163-172 1805-0697 1805-0689 |
op_relation |
http://journals.muni.cz/CPR/article/view/12838/11170 http://journals.muni.cz/CPR/article/view/12838 |
op_rights |
Copyright (c) 2020 Czech Polar Reports https://creativecommons.org/licenses/by-nc-nd/4.0 |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766245069162020864 |