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Phycobilisome Mobility and Its Role in the Regulation of Light Harvesting in Red Algae
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SYSNO ASEP 0435849 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Phycobilisome Mobility and Its Role in the Regulation of Light Harvesting in Red Algae Author(s) Kaňa, Radek (MBU-M) RID, ORCID
Kotabová, Eva (MBU-M) RID, ORCID
Lukeš, Martin (MBU-M) ORCID
Papáček, Š. (CZ)
Matonoha, Ctirad (UIVT-O) RID, SAI
Liu, L.N. (GB)
Prášil, Ondřej (MBU-M) RID, ORCID
Mullineaux, C.W. (GB)Source Title Plant Physiology. - : Oxford University Press - ISSN 0032-0889
Roč. 165, č. 4 (2014), s. 1618-1631Number of pages 14 s. Language eng - English Country US - United States Keywords EXCITATION-ENERGY TRANSFER ; CYANOBACTERIAL THYLAKOID MEMBRANES ; MICROALGA PORPHYRIDIUM-CRUENTUM Subject RIV EE - Microbiology, Virology Subject RIV - cooperation Institute of Computer Science - General Mathematics R&D Projects GAP501/12/0304 GA ČR - Czech Science Foundation (CSF) ED2.1.00/03.0110 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support MBU-M - RVO:61388971 ; UIVT-O - RVO:67985807 UT WOS 000341648600019 EID SCOPUS 84905266284 DOI 10.1104/pp.114.236075 Annotation Red algae represent an evolutionarily important group that gave rise to the whole red clade of photosynthetic organisms. They contain a unique combination of light-harvesting systems represented by a membrane-bound antenna and by phycobilisomes situated on thylakoid membrane surfaces. So far, very little has been revealed about the mobility of their phycobilisomes and the regulation of their light-harvesting system in general. Therefore, we carried out a detailed analysis of phycobilisome dynamics in several red alga strains and compared these results with the presence (or absence) of photoprotective mechanisms. Our data conclusively prove phycobilisome mobility in two model mesophilic red alga strains, Porphyridium cruentum and Rhodella violacea. In contrast, there was almost no phycobilisome mobility in the thermophilic red alga Cyanidium caldarium that was not caused by a decrease in lipid desaturation in this extremophile. Experimental data attributed this immobility to the strong phycobilisome-photosystem interaction that highly restricted phycobilisome movement. Variations in phycobilisome mobility reflect the different ways in which light-harvesting antennae can be regulated in mesophilic and thermophilic red algae. Fluorescence changes attributed in cyanobacteria to state transitions were observed only in mesophilic P. cruentum with mobile phycobilisomes, and they were absent in the extremophilic C. caldarium with immobile phycobilisomes. We suggest that state transitions have an important regulatory function in mesophilic red algae; however, in thermophilic red algae, this process is replaced by nonphotochemical quenching Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2015
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