Effects of temperature and water availability on light energy utilization in photosynthetic processes of Deschampsia antarctica
Regional climate change in Antarctica would favor the carbon assimilation of Antarctic vascular plants, since rising temperatures are approaching their photosynthetic optimum (10–19°C). This could be detrimental for photoprotection mechanisms, mainly those associated with thermal dissipation, making...
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crwiley:10.1111/ppl.12739 2024-04-21T07:52:35+00:00 Effects of temperature and water availability on light energy utilization in photosynthetic processes of Deschampsia antarctica Sáez, Patricia L. Rivera, Betsy K. Ramírez, Constanza F. Vallejos, Valentina Cavieres, Lohengrin A. Corcuera, Luis J. Bravo, León A. Fondo Nacional de Desarrollo Científico y Tecnológico Comisión Nacional de Investigación Científica y Tecnológica 2018 http://dx.doi.org/10.1111/ppl.12739 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fppl.12739 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ppl.12739 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Physiologia Plantarum volume 165, issue 3, page 511-523 ISSN 0031-9317 1399-3054 Cell Biology Plant Science Genetics General Medicine Physiology journal-article 2018 crwiley https://doi.org/10.1111/ppl.12739 2024-03-28T08:27:18Z Regional climate change in Antarctica would favor the carbon assimilation of Antarctic vascular plants, since rising temperatures are approaching their photosynthetic optimum (10–19°C). This could be detrimental for photoprotection mechanisms, mainly those associated with thermal dissipation, making plants more susceptible to eventual drought predicted by climate change models. With the purpose to study the effect of temperature and water availability on light energy utilization and putative adjustments in photoprotective mechanisms of Deschampsia antarctica Desv., plants were collected from two Antarctic provenances: King George Island and Lagotellerie Island. Plants were cultivated at 5, 10 and 16°C under well‐watered (WW) and water‐deficit (WD, at 35% of the field capacity) conditions. Chlorophyll fluorescence, pigment content and de‐epoxidation state were evaluated. Regardless of provenances, D. antarctica showed similar morphological, biochemical and functional responses to growth temperature. Higher temperature triggered an increase in photochemical activity (i.e. electron transport rate and photochemical quenching), and a decrease in thermal dissipation capacity (i.e. lower xanthophyll pool, Chl a / b and β carotene/neoxanthin ratios). Leaf mass per unit area was reduced at higher temperature, and was only affected in plants exposed to WD at 16°C and exhibiting lower electron transport rate and amount of chlorophylls. D. antarctica is adapted to frequent freezing events, which may induce a form of physiological water stress. Photoprotective responses observed under WD contribute to maintain a stable photochemical activity. Thus, it is possible that short‐term temperature increases could favor the photochemical activity of this species. However, long‐term effects will depend on the magnitude of changes and the plant's ability to adjust to new growth temperature. Article in Journal/Newspaper Antarc* Antarctic Antarctica King George Island Lagotellerie Island Wiley Online Library Physiologia Plantarum 165 3 511 523 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
topic |
Cell Biology Plant Science Genetics General Medicine Physiology |
spellingShingle |
Cell Biology Plant Science Genetics General Medicine Physiology Sáez, Patricia L. Rivera, Betsy K. Ramírez, Constanza F. Vallejos, Valentina Cavieres, Lohengrin A. Corcuera, Luis J. Bravo, León A. Effects of temperature and water availability on light energy utilization in photosynthetic processes of Deschampsia antarctica |
topic_facet |
Cell Biology Plant Science Genetics General Medicine Physiology |
description |
Regional climate change in Antarctica would favor the carbon assimilation of Antarctic vascular plants, since rising temperatures are approaching their photosynthetic optimum (10–19°C). This could be detrimental for photoprotection mechanisms, mainly those associated with thermal dissipation, making plants more susceptible to eventual drought predicted by climate change models. With the purpose to study the effect of temperature and water availability on light energy utilization and putative adjustments in photoprotective mechanisms of Deschampsia antarctica Desv., plants were collected from two Antarctic provenances: King George Island and Lagotellerie Island. Plants were cultivated at 5, 10 and 16°C under well‐watered (WW) and water‐deficit (WD, at 35% of the field capacity) conditions. Chlorophyll fluorescence, pigment content and de‐epoxidation state were evaluated. Regardless of provenances, D. antarctica showed similar morphological, biochemical and functional responses to growth temperature. Higher temperature triggered an increase in photochemical activity (i.e. electron transport rate and photochemical quenching), and a decrease in thermal dissipation capacity (i.e. lower xanthophyll pool, Chl a / b and β carotene/neoxanthin ratios). Leaf mass per unit area was reduced at higher temperature, and was only affected in plants exposed to WD at 16°C and exhibiting lower electron transport rate and amount of chlorophylls. D. antarctica is adapted to frequent freezing events, which may induce a form of physiological water stress. Photoprotective responses observed under WD contribute to maintain a stable photochemical activity. Thus, it is possible that short‐term temperature increases could favor the photochemical activity of this species. However, long‐term effects will depend on the magnitude of changes and the plant's ability to adjust to new growth temperature. |
author2 |
Fondo Nacional de Desarrollo Científico y Tecnológico Comisión Nacional de Investigación Científica y Tecnológica |
format |
Article in Journal/Newspaper |
author |
Sáez, Patricia L. Rivera, Betsy K. Ramírez, Constanza F. Vallejos, Valentina Cavieres, Lohengrin A. Corcuera, Luis J. Bravo, León A. |
author_facet |
Sáez, Patricia L. Rivera, Betsy K. Ramírez, Constanza F. Vallejos, Valentina Cavieres, Lohengrin A. Corcuera, Luis J. Bravo, León A. |
author_sort |
Sáez, Patricia L. |
title |
Effects of temperature and water availability on light energy utilization in photosynthetic processes of Deschampsia antarctica |
title_short |
Effects of temperature and water availability on light energy utilization in photosynthetic processes of Deschampsia antarctica |
title_full |
Effects of temperature and water availability on light energy utilization in photosynthetic processes of Deschampsia antarctica |
title_fullStr |
Effects of temperature and water availability on light energy utilization in photosynthetic processes of Deschampsia antarctica |
title_full_unstemmed |
Effects of temperature and water availability on light energy utilization in photosynthetic processes of Deschampsia antarctica |
title_sort |
effects of temperature and water availability on light energy utilization in photosynthetic processes of deschampsia antarctica |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/ppl.12739 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fppl.12739 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ppl.12739 |
genre |
Antarc* Antarctic Antarctica King George Island Lagotellerie Island |
genre_facet |
Antarc* Antarctic Antarctica King George Island Lagotellerie Island |
op_source |
Physiologia Plantarum volume 165, issue 3, page 511-523 ISSN 0031-9317 1399-3054 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ppl.12739 |
container_title |
Physiologia Plantarum |
container_volume |
165 |
container_issue |
3 |
container_start_page |
511 |
op_container_end_page |
523 |
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1796935804003549184 |