Antioxidant responses ofin vitroshoots of Deschampsia antarcticato Polyethylene glycol treatment
Abstract To understand the adaptability to environmental stresses by Deschampsia antarctica , one of the two vascular plants growing in Antarctica, we analysed the activity of several antioxidant enzymes, including peroxidase (POD, EC 1.11.1.7), ascorbate peroxidase (APX, EC 1.11.1.11), catalase (CA...
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crcambridgeupr:10.1017/s0954102009990733 2024-05-19T07:31:46+00:00 Antioxidant responses ofin vitroshoots of Deschampsia antarcticato Polyethylene glycol treatment Zamora, Pablo Rasmussen, Susana Pardo, Ariel Prieto, Humberto Zúñiga, Gustavo E. 2010 http://dx.doi.org/10.1017/s0954102009990733 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102009990733 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 22, issue 2, page 163-169 ISSN 0954-1020 1365-2079 journal-article 2010 crcambridgeupr https://doi.org/10.1017/s0954102009990733 2024-05-02T06:51:07Z Abstract To understand the adaptability to environmental stresses by Deschampsia antarctica , one of the two vascular plants growing in Antarctica, we analysed the activity of several antioxidant enzymes, including peroxidase (POD, EC 1.11.1.7), ascorbate peroxidase (APX, EC 1.11.1.11), catalase (CAT, EC 1.11.1.6)) and glutathion reductase (GR, EC 1.6.4.2), in shoots subjected to drought stress (PEG-8000, -0.3 MPa). Additionally, levels of total phenolic compounds, flavonoids and ascorbate, were determined. The content of malondialdehyde (MDA), chlorophyll and hydrogen peroxide did not change as a result of PEG-8000 treatment. In addition, treated plants showed higher enzymatic activity of CAT, POD and GR in shoots than control plants. In addition, a high capacity to scavenge free radicals was also detected in stressed plants. These results seem to indicate that in D. antarctica tolerance of drought stress is associated with enhanced activity of antioxidant enzymes and free radical scavenging capacity. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Cambridge University Press Antarctic Science 22 2 163 169 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
Abstract To understand the adaptability to environmental stresses by Deschampsia antarctica , one of the two vascular plants growing in Antarctica, we analysed the activity of several antioxidant enzymes, including peroxidase (POD, EC 1.11.1.7), ascorbate peroxidase (APX, EC 1.11.1.11), catalase (CAT, EC 1.11.1.6)) and glutathion reductase (GR, EC 1.6.4.2), in shoots subjected to drought stress (PEG-8000, -0.3 MPa). Additionally, levels of total phenolic compounds, flavonoids and ascorbate, were determined. The content of malondialdehyde (MDA), chlorophyll and hydrogen peroxide did not change as a result of PEG-8000 treatment. In addition, treated plants showed higher enzymatic activity of CAT, POD and GR in shoots than control plants. In addition, a high capacity to scavenge free radicals was also detected in stressed plants. These results seem to indicate that in D. antarctica tolerance of drought stress is associated with enhanced activity of antioxidant enzymes and free radical scavenging capacity. |
format |
Article in Journal/Newspaper |
author |
Zamora, Pablo Rasmussen, Susana Pardo, Ariel Prieto, Humberto Zúñiga, Gustavo E. |
spellingShingle |
Zamora, Pablo Rasmussen, Susana Pardo, Ariel Prieto, Humberto Zúñiga, Gustavo E. Antioxidant responses ofin vitroshoots of Deschampsia antarcticato Polyethylene glycol treatment |
author_facet |
Zamora, Pablo Rasmussen, Susana Pardo, Ariel Prieto, Humberto Zúñiga, Gustavo E. |
author_sort |
Zamora, Pablo |
title |
Antioxidant responses ofin vitroshoots of Deschampsia antarcticato Polyethylene glycol treatment |
title_short |
Antioxidant responses ofin vitroshoots of Deschampsia antarcticato Polyethylene glycol treatment |
title_full |
Antioxidant responses ofin vitroshoots of Deschampsia antarcticato Polyethylene glycol treatment |
title_fullStr |
Antioxidant responses ofin vitroshoots of Deschampsia antarcticato Polyethylene glycol treatment |
title_full_unstemmed |
Antioxidant responses ofin vitroshoots of Deschampsia antarcticato Polyethylene glycol treatment |
title_sort |
antioxidant responses ofin vitroshoots of deschampsia antarcticato polyethylene glycol treatment |
publisher |
Cambridge University Press (CUP) |
publishDate |
2010 |
url |
http://dx.doi.org/10.1017/s0954102009990733 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102009990733 |
genre |
Antarc* Antarctic Science Antarctica |
genre_facet |
Antarc* Antarctic Science Antarctica |
op_source |
Antarctic Science volume 22, issue 2, page 163-169 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102009990733 |
container_title |
Antarctic Science |
container_volume |
22 |
container_issue |
2 |
container_start_page |
163 |
op_container_end_page |
169 |
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1799469652966899712 |