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Photoinhibition or photoprotection of photosynthesis?: update on the (newly termed) sustained quenching component qH
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). (Alizée Malnoë)ORCID iD: 0000-0002-8777-3174
2018 (English)In: Environmental and Experimental Botany, ISSN 0098-8472, E-ISSN 1873-7307, Vol. 154, p. 123-133Article, review/survey (Refereed) Published
Abstract [en]

Non-photochemical quenching (NPQ) of chlorophyll fluorescence is a valuable feature for the study of photosynthetic organisms’ light utilization and dissipation. However, all too often NPQ is simply equated with the harmless dissipation of excess absorbed light energy as heat. This is not always the case as some processes cause NPQ without thermal dissipation. Photoinhibitory quenching, qI, is sustained NPQ that continuously depresses the commonly used fluorescence parameter “quantum yield of photosystem II (PSII)”, or Fv/Fm, and is often viewed as a result of PSII core inactivation due to D1 damage. Inactivated PSII cores might have a photoprotective role but that is not the topic of the present review. Instead, this review focuses on a sustained photoprotective antenna quenching component, which we have termed qH, and summarizes the recently uncovered molecular players of this sustained form of NPQ.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 154, p. 123-133
Keywords [en]
Arabidopsis, Energy dissipation, NPQ, Photoinhibition, Photoprotection
National Category
Botany
Identifiers
URN: urn:nbn:se:umu:diva-150141DOI: 10.1016/j.envexpbot.2018.05.005ISI: 000443669000013Scopus ID: 2-s2.0-85048152660OAI: oai:DiVA.org:umu-150141DiVA, id: diva2:1232152
Note

Special issue: SI

Available from: 2018-07-10 Created: 2018-07-10 Last updated: 2018-11-05Bibliographically approved

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Malnoë, Alizée

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CiteExportLink to record
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