Evidence for phenotypic plasticity in the Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241
Life in extreme environments poses unique challenges to photosynthetic organisms. The ability for an extremophilic green alga and its genetic and mesophilic equivalent to acclimate to changes in their environment was examined to determine the extent of their phenotypic plasticities. The Antarctic ex...
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fthighwire:oai:open-archive.highwire.org:jexbot:erq347v1 2023-05-15T14:05:17+02:00 Evidence for phenotypic plasticity in the Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241 Pocock, Tessa Vetterli, Adrien Falk, Stefan 2010-11-01 06:19:25.0 text/html http://jxb.oxfordjournals.org/cgi/content/short/erq347v1 https://doi.org/10.1093/jxb/erq347 en eng Oxford University Press http://jxb.oxfordjournals.org/cgi/content/short/erq347v1 http://dx.doi.org/10.1093/jxb/erq347 Copyright (C) 2010, Society for Experimental Biology Research Paper TEXT 2010 fthighwire https://doi.org/10.1093/jxb/erq347 2013-05-27T01:04:01Z Life in extreme environments poses unique challenges to photosynthetic organisms. The ability for an extremophilic green alga and its genetic and mesophilic equivalent to acclimate to changes in their environment was examined to determine the extent of their phenotypic plasticities. The Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241 (UWO) was isolated from an ice-covered lake in Antarctica, whereas its mesophilic counterpart C. raudensis Ettl. SAG 49.72 (SAG) was isolated from a meadow pool in the Czech Republic. The effects of changes in temperature and salinity on growth, morphology, and photochemistry were examined in the two strains. Differential acclimative responses were observed in UWO which include a wider salinity range for growth, and broader temperature- and salt-induced fluctuations in F v / F m , relative to SAG. Furthermore, the redox state of the photosynthetic electron transport chain, measured as 1–q P , was modulated in the extremophile whereas this was not observed in the mesophile. Interestingly, it is shown for the first time that SAG is similar to UWO in that it is unable to undergo state transitions. The different natural histories of these two strains exert different evolutionary pressures and, consequently, different abilities for acclimation, an important component of phenotypic plasticity. In contrast to SAG, UWO relied on a redox sensing and signalling system under the growth conditions used in this study. It is proposed that growth and adaptation of UWO under a stressful and extreme environment poises this extremophile for better success under changing environmental conditions. Text Antarc* Antarctic Antarctica HighWire Press (Stanford University) Antarctic The Antarctic Journal of Experimental Botany 62 3 1169 1177 |
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English |
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Research Paper |
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Research Paper Pocock, Tessa Vetterli, Adrien Falk, Stefan Evidence for phenotypic plasticity in the Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241 |
topic_facet |
Research Paper |
description |
Life in extreme environments poses unique challenges to photosynthetic organisms. The ability for an extremophilic green alga and its genetic and mesophilic equivalent to acclimate to changes in their environment was examined to determine the extent of their phenotypic plasticities. The Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241 (UWO) was isolated from an ice-covered lake in Antarctica, whereas its mesophilic counterpart C. raudensis Ettl. SAG 49.72 (SAG) was isolated from a meadow pool in the Czech Republic. The effects of changes in temperature and salinity on growth, morphology, and photochemistry were examined in the two strains. Differential acclimative responses were observed in UWO which include a wider salinity range for growth, and broader temperature- and salt-induced fluctuations in F v / F m , relative to SAG. Furthermore, the redox state of the photosynthetic electron transport chain, measured as 1–q P , was modulated in the extremophile whereas this was not observed in the mesophile. Interestingly, it is shown for the first time that SAG is similar to UWO in that it is unable to undergo state transitions. The different natural histories of these two strains exert different evolutionary pressures and, consequently, different abilities for acclimation, an important component of phenotypic plasticity. In contrast to SAG, UWO relied on a redox sensing and signalling system under the growth conditions used in this study. It is proposed that growth and adaptation of UWO under a stressful and extreme environment poises this extremophile for better success under changing environmental conditions. |
format |
Text |
author |
Pocock, Tessa Vetterli, Adrien Falk, Stefan |
author_facet |
Pocock, Tessa Vetterli, Adrien Falk, Stefan |
author_sort |
Pocock, Tessa |
title |
Evidence for phenotypic plasticity in the Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241 |
title_short |
Evidence for phenotypic plasticity in the Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241 |
title_full |
Evidence for phenotypic plasticity in the Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241 |
title_fullStr |
Evidence for phenotypic plasticity in the Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241 |
title_full_unstemmed |
Evidence for phenotypic plasticity in the Antarctic extremophile Chlamydomonas raudensis Ettl. UWO 241 |
title_sort |
evidence for phenotypic plasticity in the antarctic extremophile chlamydomonas raudensis ettl. uwo 241 |
publisher |
Oxford University Press |
publishDate |
2010 |
url |
http://jxb.oxfordjournals.org/cgi/content/short/erq347v1 https://doi.org/10.1093/jxb/erq347 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://jxb.oxfordjournals.org/cgi/content/short/erq347v1 http://dx.doi.org/10.1093/jxb/erq347 |
op_rights |
Copyright (C) 2010, Society for Experimental Biology |
op_doi |
https://doi.org/10.1093/jxb/erq347 |
container_title |
Journal of Experimental Botany |
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62 |
container_issue |
3 |
container_start_page |
1169 |
op_container_end_page |
1177 |
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1766277101394067456 |