Adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains
Snow algal blooms are widespread, dominating low temperature, high light, and oligotrophic melting snowpacks. Here, we assessed the photophysiological and cellular stoichiometric responses of snow algal genera Chloromonas spp. and Microglena spp. in their vegetative life stage isolated from the Arct...
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ftpubmed:oai:pubmedcentral.nih.gov:10481995 2023-10-09T21:46:50+02:00 Adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains Broadwell, Emily L M Pickford, Rachel E Perkins, Rupert G Sgouridis, Fotis Williamson, Christopher J 2023-08-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10481995/ http://www.ncbi.nlm.nih.gov/pubmed/37553143 https://doi.org/10.1093/femsec/fiad088 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10481995/ http://www.ncbi.nlm.nih.gov/pubmed/37553143 http://dx.doi.org/10.1093/femsec/fiad088 © The Author(s) 2023. Published by Oxford University Press on behalf of FEMS. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. FEMS Microbiol Ecol Research Article Text 2023 ftpubmed https://doi.org/10.1093/femsec/fiad088 2023-09-10T01:08:14Z Snow algal blooms are widespread, dominating low temperature, high light, and oligotrophic melting snowpacks. Here, we assessed the photophysiological and cellular stoichiometric responses of snow algal genera Chloromonas spp. and Microglena spp. in their vegetative life stage isolated from the Arctic and Antarctic to gradients in temperature (5 – 15°C), nitrate availability (1 – 10 µmol L(−1)), and light (50 and 500 µmol photons m(−2) s(−1)). When grown under gradients in temperature, measured snow algal strains displayed Fv/Fm values increased by ∼115% and electron transport rates decreased by ∼50% at 5°C compared to 10 and 15°C, demonstrating how low temperatures can mimic high light impacts to photophysiology. When using carrying capacity as opposed to growth rate as a metric for determining the temperature optima, these snow algal strains can be defined as psychrophilic, with carrying capacities ∼90% higher at 5°C than warmer temperatures. All strains approached Redfield C:N stoichiometry when cultured under nutrient replete conditions regardless of temperature (5.7 ± 0.4 across all strains), whereas significant increases in C:N were apparent when strains were cultured under nitrate concentrations that reflected in situ conditions (17.8 ± 5.9). Intra-specific responses in photophysiology were apparent under high light with Chloromonas spp. more capable of acclimating to higher light intensities. These findings suggest that in situ conditions are not optimal for the studied snow algal strains, but they are able to dynamically adjust both their photochemistry and stoichiometry to acclimate to these conditions. Text Antarc* Antarctic Arctic PubMed Central (PMC) Arctic Antarctic FEMS Microbiology Ecology 99 9 |
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English |
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Research Article |
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Research Article Broadwell, Emily L M Pickford, Rachel E Perkins, Rupert G Sgouridis, Fotis Williamson, Christopher J Adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains |
topic_facet |
Research Article |
description |
Snow algal blooms are widespread, dominating low temperature, high light, and oligotrophic melting snowpacks. Here, we assessed the photophysiological and cellular stoichiometric responses of snow algal genera Chloromonas spp. and Microglena spp. in their vegetative life stage isolated from the Arctic and Antarctic to gradients in temperature (5 – 15°C), nitrate availability (1 – 10 µmol L(−1)), and light (50 and 500 µmol photons m(−2) s(−1)). When grown under gradients in temperature, measured snow algal strains displayed Fv/Fm values increased by ∼115% and electron transport rates decreased by ∼50% at 5°C compared to 10 and 15°C, demonstrating how low temperatures can mimic high light impacts to photophysiology. When using carrying capacity as opposed to growth rate as a metric for determining the temperature optima, these snow algal strains can be defined as psychrophilic, with carrying capacities ∼90% higher at 5°C than warmer temperatures. All strains approached Redfield C:N stoichiometry when cultured under nutrient replete conditions regardless of temperature (5.7 ± 0.4 across all strains), whereas significant increases in C:N were apparent when strains were cultured under nitrate concentrations that reflected in situ conditions (17.8 ± 5.9). Intra-specific responses in photophysiology were apparent under high light with Chloromonas spp. more capable of acclimating to higher light intensities. These findings suggest that in situ conditions are not optimal for the studied snow algal strains, but they are able to dynamically adjust both their photochemistry and stoichiometry to acclimate to these conditions. |
format |
Text |
author |
Broadwell, Emily L M Pickford, Rachel E Perkins, Rupert G Sgouridis, Fotis Williamson, Christopher J |
author_facet |
Broadwell, Emily L M Pickford, Rachel E Perkins, Rupert G Sgouridis, Fotis Williamson, Christopher J |
author_sort |
Broadwell, Emily L M |
title |
Adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains |
title_short |
Adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains |
title_full |
Adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains |
title_fullStr |
Adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains |
title_full_unstemmed |
Adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains |
title_sort |
adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains |
publisher |
Oxford University Press |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10481995/ http://www.ncbi.nlm.nih.gov/pubmed/37553143 https://doi.org/10.1093/femsec/fiad088 |
geographic |
Arctic Antarctic |
geographic_facet |
Arctic Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
FEMS Microbiol Ecol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10481995/ http://www.ncbi.nlm.nih.gov/pubmed/37553143 http://dx.doi.org/10.1093/femsec/fiad088 |
op_rights |
© The Author(s) 2023. Published by Oxford University Press on behalf of FEMS. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
op_doi |
https://doi.org/10.1093/femsec/fiad088 |
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FEMS Microbiology Ecology |
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99 |
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9 |
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1779309378654961664 |