Symbiosis at its limits: ecophysiological consequences of lichenization in the genus Prasiola in Antarctica
BACKGROUND AND AIMS: Lichens represent a symbiotic relationship between at least one fungal and one photosynthetic partner. The association between the lichen-forming fungus Mastodia tessellata (Verrucariaceae) and different species of Prasiola (Trebouxiophyceae) has an amphipolar distribution and r...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6943718/ http://www.ncbi.nlm.nih.gov/pubmed/31549137 https://doi.org/10.1093/aob/mcz149 |
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ftpubmed:oai:pubmedcentral.nih.gov:6943718 2023-05-15T13:58:56+02:00 Symbiosis at its limits: ecophysiological consequences of lichenization in the genus Prasiola in Antarctica Fernández-Marín, Beatriz López-Pozo, Marina Perera-Castro, Alicia V Arzac, Miren Irati Sáenz-Ceniceros, Ana Colesie, Claudia de los Ríos, Asunción Sancho, Leo G Pintado, Ana Laza, José M Pérez-Ortega, Sergio García-Plazaola, José I 2019-12 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6943718/ http://www.ncbi.nlm.nih.gov/pubmed/31549137 https://doi.org/10.1093/aob/mcz149 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6943718/ http://www.ncbi.nlm.nih.gov/pubmed/31549137 http://dx.doi.org/10.1093/aob/mcz149 © The Author(s) 2019. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) Ann Bot Original Articles Text 2019 ftpubmed https://doi.org/10.1093/aob/mcz149 2021-01-03T01:22:29Z BACKGROUND AND AIMS: Lichens represent a symbiotic relationship between at least one fungal and one photosynthetic partner. The association between the lichen-forming fungus Mastodia tessellata (Verrucariaceae) and different species of Prasiola (Trebouxiophyceae) has an amphipolar distribution and represents a unique case study for the understanding of lichen symbiosis because of the macroalgal nature of the photobiont, the flexibility of the symbiotic interaction and the co-existence of free-living and lichenized forms in the same microenvironment. In this context, we aimed to (1) characterize the photosynthetic performance of co-occurring populations of free-living and lichenized Prasiola and (2) assess the effect of the symbiosis on water relations in Prasiola, including its tolerance of desiccation and its survival and performance under sub-zero temperatures. METHODS: Photochemical responses to irradiance, desiccation and freezing temperature and pressure–volume curves of co-existing free-living and lichenized Prasiola thalli were measured in situ in Livingston Island (Maritime Antarctica). Analyses of photosynthetic pigment, glass transition and ice nucleation temperatures, surface hydrophobicity extent and molecular analyses were conducted in the laboratory. KEY RESULTS: Free-living and lichenized forms of Prasiola were identified as two different species: P. crispa and Prasiola sp., respectively. While lichenization appears to have no effect on the photochemical performance of the alga or its tolerance of desiccation (in the short term), the symbiotic lifestyle involves (1) changes in water relations, (2) a considerable decrease in the net carbon balance and (3) enhanced freezing tolerance. CONCLUSIONS: Our results support improved tolerance of sub-zero temperature as the main benefit of lichenization for the photobiont, but highlight that lichenization represents a delicate equilibrium between a mutualistic and a less reciprocal relationship. In a warmer climate scenario, the spread of the free-living ... Text Antarc* Antarctica Livingston Island PubMed Central (PMC) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Annals of Botany 124 7 1211 1226 |
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English |
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Original Articles |
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Original Articles Fernández-Marín, Beatriz López-Pozo, Marina Perera-Castro, Alicia V Arzac, Miren Irati Sáenz-Ceniceros, Ana Colesie, Claudia de los Ríos, Asunción Sancho, Leo G Pintado, Ana Laza, José M Pérez-Ortega, Sergio García-Plazaola, José I Symbiosis at its limits: ecophysiological consequences of lichenization in the genus Prasiola in Antarctica |
topic_facet |
Original Articles |
description |
BACKGROUND AND AIMS: Lichens represent a symbiotic relationship between at least one fungal and one photosynthetic partner. The association between the lichen-forming fungus Mastodia tessellata (Verrucariaceae) and different species of Prasiola (Trebouxiophyceae) has an amphipolar distribution and represents a unique case study for the understanding of lichen symbiosis because of the macroalgal nature of the photobiont, the flexibility of the symbiotic interaction and the co-existence of free-living and lichenized forms in the same microenvironment. In this context, we aimed to (1) characterize the photosynthetic performance of co-occurring populations of free-living and lichenized Prasiola and (2) assess the effect of the symbiosis on water relations in Prasiola, including its tolerance of desiccation and its survival and performance under sub-zero temperatures. METHODS: Photochemical responses to irradiance, desiccation and freezing temperature and pressure–volume curves of co-existing free-living and lichenized Prasiola thalli were measured in situ in Livingston Island (Maritime Antarctica). Analyses of photosynthetic pigment, glass transition and ice nucleation temperatures, surface hydrophobicity extent and molecular analyses were conducted in the laboratory. KEY RESULTS: Free-living and lichenized forms of Prasiola were identified as two different species: P. crispa and Prasiola sp., respectively. While lichenization appears to have no effect on the photochemical performance of the alga or its tolerance of desiccation (in the short term), the symbiotic lifestyle involves (1) changes in water relations, (2) a considerable decrease in the net carbon balance and (3) enhanced freezing tolerance. CONCLUSIONS: Our results support improved tolerance of sub-zero temperature as the main benefit of lichenization for the photobiont, but highlight that lichenization represents a delicate equilibrium between a mutualistic and a less reciprocal relationship. In a warmer climate scenario, the spread of the free-living ... |
format |
Text |
author |
Fernández-Marín, Beatriz López-Pozo, Marina Perera-Castro, Alicia V Arzac, Miren Irati Sáenz-Ceniceros, Ana Colesie, Claudia de los Ríos, Asunción Sancho, Leo G Pintado, Ana Laza, José M Pérez-Ortega, Sergio García-Plazaola, José I |
author_facet |
Fernández-Marín, Beatriz López-Pozo, Marina Perera-Castro, Alicia V Arzac, Miren Irati Sáenz-Ceniceros, Ana Colesie, Claudia de los Ríos, Asunción Sancho, Leo G Pintado, Ana Laza, José M Pérez-Ortega, Sergio García-Plazaola, José I |
author_sort |
Fernández-Marín, Beatriz |
title |
Symbiosis at its limits: ecophysiological consequences of lichenization in the genus Prasiola in Antarctica |
title_short |
Symbiosis at its limits: ecophysiological consequences of lichenization in the genus Prasiola in Antarctica |
title_full |
Symbiosis at its limits: ecophysiological consequences of lichenization in the genus Prasiola in Antarctica |
title_fullStr |
Symbiosis at its limits: ecophysiological consequences of lichenization in the genus Prasiola in Antarctica |
title_full_unstemmed |
Symbiosis at its limits: ecophysiological consequences of lichenization in the genus Prasiola in Antarctica |
title_sort |
symbiosis at its limits: ecophysiological consequences of lichenization in the genus prasiola in antarctica |
publisher |
Oxford University Press |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6943718/ http://www.ncbi.nlm.nih.gov/pubmed/31549137 https://doi.org/10.1093/aob/mcz149 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Livingston Island |
geographic_facet |
Livingston Island |
genre |
Antarc* Antarctica Livingston Island |
genre_facet |
Antarc* Antarctica Livingston Island |
op_source |
Ann Bot |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6943718/ http://www.ncbi.nlm.nih.gov/pubmed/31549137 http://dx.doi.org/10.1093/aob/mcz149 |
op_rights |
© The Author(s) 2019. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) |
op_doi |
https://doi.org/10.1093/aob/mcz149 |
container_title |
Annals of Botany |
container_volume |
124 |
container_issue |
7 |
container_start_page |
1211 |
op_container_end_page |
1226 |
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1766267307465637888 |