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Terrestrial adaptation of green algae Klebsormidium and Zygnema (Charophyta) involves diversity in photosynthetic traits but not in CO(2) acquisition

The basal streptophyte Klebsormidium and the advanced Zygnema show adaptation to terrestrialization. Differences are found in photoprotection and resistance to short-term light changes, but not in CO (2) acquisition. Streptophyte green algae colonized land about 450–500 million years ago giving orig...

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Autores principales: Pierangelini, Mattia, Ryšánek, David, Lang, Ingeborg, Adlassnig, Wolfram, Holzinger, Andreas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5633629/
https://www.ncbi.nlm.nih.gov/pubmed/28721563
http://dx.doi.org/10.1007/s00425-017-2741-5
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author Pierangelini, Mattia
Ryšánek, David
Lang, Ingeborg
Adlassnig, Wolfram
Holzinger, Andreas
author_facet Pierangelini, Mattia
Ryšánek, David
Lang, Ingeborg
Adlassnig, Wolfram
Holzinger, Andreas
author_sort Pierangelini, Mattia
collection PubMed
description The basal streptophyte Klebsormidium and the advanced Zygnema show adaptation to terrestrialization. Differences are found in photoprotection and resistance to short-term light changes, but not in CO (2) acquisition. Streptophyte green algae colonized land about 450–500 million years ago giving origin to terrestrial plants. We aim to understand how their physiological adaptations are linked to the ecological conditions (light, water and CO(2)) characterizing modern terrestrial habitats. A new Klebsormidium isolate from a strongly acidic environment of a former copper mine (Schwarzwand, Austria) is investigated, in comparison to Klebsormidium cf. flaccidum and Zygnema sp. We show that these genera possess different photosynthetic traits and water requirements. Particularly, the Klebsormidium species displayed a higher photoprotection capacity, concluded from non-photochemical quenching (NPQ) and higher tolerance to high light intensity than Zygnema. However, Klebsormidium suffered from photoinhibition when the light intensity in the environment increased rapidly, indicating that NPQ is involved in photoprotection against strong and stable irradiance. Klebsormidium was also highly resistant to cellular water loss (dehydration) under low light. On the other hand, exposure to relatively high light intensity during dehydration caused a harmful over-reduction of the electron transport chain, leading to PSII damages and impairing the ability to recover after rehydration. Thus, we suggest that dehydration is a selective force shaping the adaptation of this species towards low light. Contrary to the photosynthetic characteristics, the inorganic carbon (C(i)) acquisition was equivalent between Klebsormidium and Zygnema. Despite their different habitats and restriction to hydro-terrestrial environment, the three organisms showed similar use of CO(2) and HCO(3) (−) as source of C(i) for photosynthesis, pointing out a similar adaptation of their CO(2)-concentrating mechanisms to terrestrial life. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00425-017-2741-5) contains supplementary material, which is available to authorized users.
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spelling pubmed-56336292017-10-23 Terrestrial adaptation of green algae Klebsormidium and Zygnema (Charophyta) involves diversity in photosynthetic traits but not in CO(2) acquisition Pierangelini, Mattia Ryšánek, David Lang, Ingeborg Adlassnig, Wolfram Holzinger, Andreas Planta Original Article The basal streptophyte Klebsormidium and the advanced Zygnema show adaptation to terrestrialization. Differences are found in photoprotection and resistance to short-term light changes, but not in CO (2) acquisition. Streptophyte green algae colonized land about 450–500 million years ago giving origin to terrestrial plants. We aim to understand how their physiological adaptations are linked to the ecological conditions (light, water and CO(2)) characterizing modern terrestrial habitats. A new Klebsormidium isolate from a strongly acidic environment of a former copper mine (Schwarzwand, Austria) is investigated, in comparison to Klebsormidium cf. flaccidum and Zygnema sp. We show that these genera possess different photosynthetic traits and water requirements. Particularly, the Klebsormidium species displayed a higher photoprotection capacity, concluded from non-photochemical quenching (NPQ) and higher tolerance to high light intensity than Zygnema. However, Klebsormidium suffered from photoinhibition when the light intensity in the environment increased rapidly, indicating that NPQ is involved in photoprotection against strong and stable irradiance. Klebsormidium was also highly resistant to cellular water loss (dehydration) under low light. On the other hand, exposure to relatively high light intensity during dehydration caused a harmful over-reduction of the electron transport chain, leading to PSII damages and impairing the ability to recover after rehydration. Thus, we suggest that dehydration is a selective force shaping the adaptation of this species towards low light. Contrary to the photosynthetic characteristics, the inorganic carbon (C(i)) acquisition was equivalent between Klebsormidium and Zygnema. Despite their different habitats and restriction to hydro-terrestrial environment, the three organisms showed similar use of CO(2) and HCO(3) (−) as source of C(i) for photosynthesis, pointing out a similar adaptation of their CO(2)-concentrating mechanisms to terrestrial life. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00425-017-2741-5) contains supplementary material, which is available to authorized users. Springer Berlin Heidelberg 2017-07-18 2017 /pmc/articles/PMC5633629/ /pubmed/28721563 http://dx.doi.org/10.1007/s00425-017-2741-5 Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Original Article
Pierangelini, Mattia
Ryšánek, David
Lang, Ingeborg
Adlassnig, Wolfram
Holzinger, Andreas
Terrestrial adaptation of green algae Klebsormidium and Zygnema (Charophyta) involves diversity in photosynthetic traits but not in CO(2) acquisition
title Terrestrial adaptation of green algae Klebsormidium and Zygnema (Charophyta) involves diversity in photosynthetic traits but not in CO(2) acquisition
title_full Terrestrial adaptation of green algae Klebsormidium and Zygnema (Charophyta) involves diversity in photosynthetic traits but not in CO(2) acquisition
title_fullStr Terrestrial adaptation of green algae Klebsormidium and Zygnema (Charophyta) involves diversity in photosynthetic traits but not in CO(2) acquisition
title_full_unstemmed Terrestrial adaptation of green algae Klebsormidium and Zygnema (Charophyta) involves diversity in photosynthetic traits but not in CO(2) acquisition
title_short Terrestrial adaptation of green algae Klebsormidium and Zygnema (Charophyta) involves diversity in photosynthetic traits but not in CO(2) acquisition
title_sort terrestrial adaptation of green algae klebsormidium and zygnema (charophyta) involves diversity in photosynthetic traits but not in co(2) acquisition
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5633629/
https://www.ncbi.nlm.nih.gov/pubmed/28721563
http://dx.doi.org/10.1007/s00425-017-2741-5
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