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Red algae acclimate...
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Voerman, Sofie E.Lyell Centre for Earth and Marine Science and Technology, Edinburgh, United Kingdom; School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh, United Kingdom
(författare)
Red algae acclimate to low light by modifying phycobilisome composition to maintain efficient light harvesting
- Artikel/kapitelEngelska2022
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2022-12-27
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BioMed Central (BMC),2022
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LIBRIS-ID:oai:DiVA.org:umu-202235
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-202235URI
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https://doi.org/10.1186/s12915-022-01480-3DOI
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Språk:engelska
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Sammanfattning på:engelska
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Background: Despite a global prevalence of photosynthetic organisms in the ocean’s mesophotic zone (30–200+ m depth), the mechanisms that enable photosynthesis to proceed in this low light environment are poorly defined. Red coralline algae are the deepest known marine benthic macroalgae — here we investigated the light harvesting mechanism and mesophotic acclimatory response of the red coralline alga Lithothamnion glaciale.Results: Following initial absorption by phycourobilin and phycoerythrobilin in phycoerythrin, energy was transferred from the phycobilisome to photosystems I and II within 120 ps. This enabled delivery of 94% of excitations to reaction centres. Low light intensity, and to a lesser extent a mesophotic spectrum, caused significant acclimatory change in chromophores and biliproteins, including a 10% increase in phycoerythrin light harvesting capacity and a 20% reduction in chlorophyll-a concentration and photon requirements for photosystems I and II. The rate of energy transfer remained consistent across experimental treatments, indicating an acclimatory response that maintains energy transfer.Conclusions: Our results demonstrate that responsive light harvesting by phycobilisomes and photosystem functional acclimation are key to red algal success in the mesophotic zone.
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Ruseckas, ArvydasOrganic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, United Kingdom
(författare)
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Turnbull, Graham A.Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, United Kingdom
(författare)
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Samuel, Ifor D. W.Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, United Kingdom
(författare)
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Burdett, Heidi L.Umeå universitet,Umeå marina forskningscentrum (UMF),Lyell Centre for Earth and Marine Science and Technology, Edinburgh, United Kingdom; School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh, United Kingdom,UMFpub(Swepub:umu)hebu0030
(författare)
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Lyell Centre for Earth and Marine Science and Technology, Edinburgh, United Kingdom; School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh, United KingdomOrganic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, United Kingdom
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:BMC Biology: BioMed Central (BMC)20:11741-7007
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