Effect of cold acclimation on the photosynthetic performance of two ecotypes of Colobanthus quitensis (Kunth) Bartl.
The effects of cold acclimation of two ecotypes (Antarctic and Andes) of Colobanthus quitensis (Kunth) Bartl. Caryophyllaceae on their photosynthetic characteristics and performance under high light (HL) were compared. Non-acclimated plants of the Antarctic ecotype exhibited a higher (34%) maximal r...
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Oxford University Press
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fthighwire:oai:open-archive.highwire.org:jexbot:58/13/3581 2023-05-15T13:49:50+02:00 Effect of cold acclimation on the photosynthetic performance of two ecotypes of Colobanthus quitensis (Kunth) Bartl. Bravo, León A. Saavedra-Mella, Felipe A. Vera, Felipe Guerra, Alexi Cavieres, Lohengrin A. Ivanov, Alexander G. Huner, Norman P. A. Corcuera, Luis J. 2007-10-01 00:00:00.0 text/html http://jxb.oxfordjournals.org/cgi/content/short/58/13/3581 https://doi.org/10.1093/jxb/erm206 en eng Oxford University Press http://jxb.oxfordjournals.org/cgi/content/short/58/13/3581 http://dx.doi.org/10.1093/jxb/erm206 Copyright (C) 2007, Society for Experimental Biology Research Papers TEXT 2007 fthighwire https://doi.org/10.1093/jxb/erm206 2013-05-27T23:53:34Z The effects of cold acclimation of two ecotypes (Antarctic and Andes) of Colobanthus quitensis (Kunth) Bartl. Caryophyllaceae on their photosynthetic characteristics and performance under high light (HL) were compared. Non-acclimated plants of the Antarctic ecotype exhibited a higher (34%) maximal rate of photosynthesis than the Andes ecotype. In cold-acclimated plants the light compensation point was increased. Dark respiration was significantly increased during the exposure to 4 °C in both ecotypes. Cold-acclimated Antarctic plants showed higher Φ PSII and qP compared with the Andes ecotype. In addition, the Antarctic ecotype exhibited higher heat dissipation ( NPQ ), especially in the cold-acclimated state, which was mainly associated with the fast relaxing component of non-photochemical quenching ( NPQ F ). By contrast, the Andes ecotype exhibited a lower NPQ F and a significant increase in the slowly relaxing component ( NPQ s ) at low temperature and HL, indicating higher sensitivity to low temperature-induced photoinhibition. Although the xanthophyll cycle was fully operational in both ecotypes, cold-acclimated Antarctic plants exposed to HL exhibited higher epoxidation state of the xanthophyll cycle pigments ( EPS ) compared with the cold-acclimated Andes ecotype. Thus, the photosynthetic apparatus of the Antarctic ecotype operates more efficiently than that of the Andes one, under a combination of low temperature and HL. The ecotype differences are discussed in relation to the different climatic conditions of the two Colobanthus . Text Antarc* Antarctic HighWire Press (Stanford University) Antarctic The Antarctic Journal of Experimental Botany 58 13 3581 3590 |
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HighWire Press (Stanford University) |
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English |
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Research Papers Bravo, León A. Saavedra-Mella, Felipe A. Vera, Felipe Guerra, Alexi Cavieres, Lohengrin A. Ivanov, Alexander G. Huner, Norman P. A. Corcuera, Luis J. Effect of cold acclimation on the photosynthetic performance of two ecotypes of Colobanthus quitensis (Kunth) Bartl. |
topic_facet |
Research Papers |
description |
The effects of cold acclimation of two ecotypes (Antarctic and Andes) of Colobanthus quitensis (Kunth) Bartl. Caryophyllaceae on their photosynthetic characteristics and performance under high light (HL) were compared. Non-acclimated plants of the Antarctic ecotype exhibited a higher (34%) maximal rate of photosynthesis than the Andes ecotype. In cold-acclimated plants the light compensation point was increased. Dark respiration was significantly increased during the exposure to 4 °C in both ecotypes. Cold-acclimated Antarctic plants showed higher Φ PSII and qP compared with the Andes ecotype. In addition, the Antarctic ecotype exhibited higher heat dissipation ( NPQ ), especially in the cold-acclimated state, which was mainly associated with the fast relaxing component of non-photochemical quenching ( NPQ F ). By contrast, the Andes ecotype exhibited a lower NPQ F and a significant increase in the slowly relaxing component ( NPQ s ) at low temperature and HL, indicating higher sensitivity to low temperature-induced photoinhibition. Although the xanthophyll cycle was fully operational in both ecotypes, cold-acclimated Antarctic plants exposed to HL exhibited higher epoxidation state of the xanthophyll cycle pigments ( EPS ) compared with the cold-acclimated Andes ecotype. Thus, the photosynthetic apparatus of the Antarctic ecotype operates more efficiently than that of the Andes one, under a combination of low temperature and HL. The ecotype differences are discussed in relation to the different climatic conditions of the two Colobanthus . |
format |
Text |
author |
Bravo, León A. Saavedra-Mella, Felipe A. Vera, Felipe Guerra, Alexi Cavieres, Lohengrin A. Ivanov, Alexander G. Huner, Norman P. A. Corcuera, Luis J. |
author_facet |
Bravo, León A. Saavedra-Mella, Felipe A. Vera, Felipe Guerra, Alexi Cavieres, Lohengrin A. Ivanov, Alexander G. Huner, Norman P. A. Corcuera, Luis J. |
author_sort |
Bravo, León A. |
title |
Effect of cold acclimation on the photosynthetic performance of two ecotypes of Colobanthus quitensis (Kunth) Bartl. |
title_short |
Effect of cold acclimation on the photosynthetic performance of two ecotypes of Colobanthus quitensis (Kunth) Bartl. |
title_full |
Effect of cold acclimation on the photosynthetic performance of two ecotypes of Colobanthus quitensis (Kunth) Bartl. |
title_fullStr |
Effect of cold acclimation on the photosynthetic performance of two ecotypes of Colobanthus quitensis (Kunth) Bartl. |
title_full_unstemmed |
Effect of cold acclimation on the photosynthetic performance of two ecotypes of Colobanthus quitensis (Kunth) Bartl. |
title_sort |
effect of cold acclimation on the photosynthetic performance of two ecotypes of colobanthus quitensis (kunth) bartl. |
publisher |
Oxford University Press |
publishDate |
2007 |
url |
http://jxb.oxfordjournals.org/cgi/content/short/58/13/3581 https://doi.org/10.1093/jxb/erm206 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://jxb.oxfordjournals.org/cgi/content/short/58/13/3581 http://dx.doi.org/10.1093/jxb/erm206 |
op_rights |
Copyright (C) 2007, Society for Experimental Biology |
op_doi |
https://doi.org/10.1093/jxb/erm206 |
container_title |
Journal of Experimental Botany |
container_volume |
58 |
container_issue |
13 |
container_start_page |
3581 |
op_container_end_page |
3590 |
_version_ |
1766252360713109504 |