The outstanding capacity of Prasiola antarctica to thrive in contrasting harsh environments relies on the constitutive protection of thylakoids and on morphological plasticity
SUMMARY The determination of physiological tolerance ranges of photosynthetic species and of the biochemical mechanisms underneath are fundamental to identify target processes and metabolites that will inspire enhanced plant management and production for the future. In this context, the terrestrial...
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Online Access: | http://dx.doi.org/10.1111/tpj.16742 https://onlinelibrary.wiley.com/doi/pdf/10.1111/tpj.16742 |
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crwiley:10.1111/tpj.16742 2024-09-15T17:42:16+00:00 The outstanding capacity of Prasiola antarctica to thrive in contrasting harsh environments relies on the constitutive protection of thylakoids and on morphological plasticity Arzac, Miren I. Miranda‐Apodaca, Jon de los Ríos, Asunción Castanyer‐Mallol, Francesc García‐Plazaola, José I. Fernández‐Marín, Beatriz Eusko Jaurlaritza Ministerio de Ciencia e Innovación 2024 http://dx.doi.org/10.1111/tpj.16742 https://onlinelibrary.wiley.com/doi/pdf/10.1111/tpj.16742 en eng Wiley http://creativecommons.org/licenses/by/4.0/ The Plant Journal volume 119, issue 1, page 65-83 ISSN 0960-7412 1365-313X journal-article 2024 crwiley https://doi.org/10.1111/tpj.16742 2024-07-25T04:20:30Z SUMMARY The determination of physiological tolerance ranges of photosynthetic species and of the biochemical mechanisms underneath are fundamental to identify target processes and metabolites that will inspire enhanced plant management and production for the future. In this context, the terrestrial green algae within the genus Prasiola represent ideal models due to their success in harsh environments (polar tundras) and their extraordinary ecological plasticity. Here we focus on the outstanding Prasiola antarctica and compare two natural populations living in very contrasting microenvironments in Antarctica: the dry sandy substrate of a beach and the rocky bed of an ephemeral freshwater stream. Specifically, we assessed their photosynthetic performance at different temperatures, reporting for the first time g nsd values in algae and changes in thylakoid metabolites in response to extreme desiccation. Stream population showed lower α‐tocopherol content and thicker cell walls and thus, lower g nsd and photosynthesis. Both populations had high temperatures for optimal photosynthesis (around +20°C) and strong constitutive tolerance to freezing and desiccation. This tolerance seems to be related to the high constitutive levels of xanthophylls and of the cylindrical lipids di‐ and tri‐galactosyldiacylglycerol in thylakoids, very likely related to the effective protection and stability of membranes. Overall, P. antarctica shows a complex battery of constitutive and plastic protective mechanisms that enable it to thrive under harsh conditions and to acclimate to very contrasting microenvironments, respectively. Some of these anatomical and biochemical adaptations may partially limit photosynthesis, but this has a great potential to rise in a context of increasing temperature. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library The Plant Journal |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
SUMMARY The determination of physiological tolerance ranges of photosynthetic species and of the biochemical mechanisms underneath are fundamental to identify target processes and metabolites that will inspire enhanced plant management and production for the future. In this context, the terrestrial green algae within the genus Prasiola represent ideal models due to their success in harsh environments (polar tundras) and their extraordinary ecological plasticity. Here we focus on the outstanding Prasiola antarctica and compare two natural populations living in very contrasting microenvironments in Antarctica: the dry sandy substrate of a beach and the rocky bed of an ephemeral freshwater stream. Specifically, we assessed their photosynthetic performance at different temperatures, reporting for the first time g nsd values in algae and changes in thylakoid metabolites in response to extreme desiccation. Stream population showed lower α‐tocopherol content and thicker cell walls and thus, lower g nsd and photosynthesis. Both populations had high temperatures for optimal photosynthesis (around +20°C) and strong constitutive tolerance to freezing and desiccation. This tolerance seems to be related to the high constitutive levels of xanthophylls and of the cylindrical lipids di‐ and tri‐galactosyldiacylglycerol in thylakoids, very likely related to the effective protection and stability of membranes. Overall, P. antarctica shows a complex battery of constitutive and plastic protective mechanisms that enable it to thrive under harsh conditions and to acclimate to very contrasting microenvironments, respectively. Some of these anatomical and biochemical adaptations may partially limit photosynthesis, but this has a great potential to rise in a context of increasing temperature. |
author2 |
Eusko Jaurlaritza Ministerio de Ciencia e Innovación |
format |
Article in Journal/Newspaper |
author |
Arzac, Miren I. Miranda‐Apodaca, Jon de los Ríos, Asunción Castanyer‐Mallol, Francesc García‐Plazaola, José I. Fernández‐Marín, Beatriz |
spellingShingle |
Arzac, Miren I. Miranda‐Apodaca, Jon de los Ríos, Asunción Castanyer‐Mallol, Francesc García‐Plazaola, José I. Fernández‐Marín, Beatriz The outstanding capacity of Prasiola antarctica to thrive in contrasting harsh environments relies on the constitutive protection of thylakoids and on morphological plasticity |
author_facet |
Arzac, Miren I. Miranda‐Apodaca, Jon de los Ríos, Asunción Castanyer‐Mallol, Francesc García‐Plazaola, José I. Fernández‐Marín, Beatriz |
author_sort |
Arzac, Miren I. |
title |
The outstanding capacity of Prasiola antarctica to thrive in contrasting harsh environments relies on the constitutive protection of thylakoids and on morphological plasticity |
title_short |
The outstanding capacity of Prasiola antarctica to thrive in contrasting harsh environments relies on the constitutive protection of thylakoids and on morphological plasticity |
title_full |
The outstanding capacity of Prasiola antarctica to thrive in contrasting harsh environments relies on the constitutive protection of thylakoids and on morphological plasticity |
title_fullStr |
The outstanding capacity of Prasiola antarctica to thrive in contrasting harsh environments relies on the constitutive protection of thylakoids and on morphological plasticity |
title_full_unstemmed |
The outstanding capacity of Prasiola antarctica to thrive in contrasting harsh environments relies on the constitutive protection of thylakoids and on morphological plasticity |
title_sort |
outstanding capacity of prasiola antarctica to thrive in contrasting harsh environments relies on the constitutive protection of thylakoids and on morphological plasticity |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1111/tpj.16742 https://onlinelibrary.wiley.com/doi/pdf/10.1111/tpj.16742 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
The Plant Journal volume 119, issue 1, page 65-83 ISSN 0960-7412 1365-313X |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/tpj.16742 |
container_title |
The Plant Journal |
_version_ |
1810488790144253952 |