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Mechanism of Photodamage of the Oxygen Evolving Mn Cluster of Photosystem II by Excessive Light Energy

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dc.contributor.authorZavafer, Alonso
dc.contributor.authorKoinuma, Wataru
dc.contributor.authorChow, Wah Soon
dc.contributor.authorCheah, Mun Hon
dc.contributor.authorMino, Hiroyuki
dc.date.accessioned2021-08-06T01:20:25Z
dc.date.available2021-08-06T01:20:25Z
dc.date.issued2017
dc.date.updated2020-11-23T10:48:33Z
dc.description.abstractPhotodamage to Photosystem II (PSII) has been attributed either to excessive excitation of photosynthetic pigments or by direct of light absorption by Mn4CaO5 cluster. Here we investigated the time course of PSII photodamage and release of Mn in PSII-enriched membranes under high light illumination at 460nm and 660nm. We found that the loss of PSII activity, assayed by chlorophyll fuorescence, is faster than release of Mn from the Mn4CaO5 cluster, assayed by EPR. Loss of PSII activity and Mn release was slower during illumination in the presence of exogenous electron acceptors. Recovery of PSII activity was observed, after 30min of addition of electron donor post illumination. The same behavior was observed under 460 and 660nm illumination, suggesting stronger correlation between excessive excitation and photodamage compared to direct light absorption by the cluster. A unifed model of PSII photodamage that takes into account present and previous literature reports is presented.en_AU
dc.description.sponsorshipA.Z., M.H.C., W.C. acknowledges Australian Research Council - Discovery grant DP120100872en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn2045-2322en_AU
dc.identifier.urihttp://hdl.handle.net/1885/243239
dc.language.isoen_AUen_AU
dc.provenanceThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.en_AU
dc.publisherNature Publishing Groupen_AU
dc.relationhttp://purl.org/au-research/grants/arc/DP120100872en_AU
dc.rights© The Author(s) 2017en_AU
dc.rights.licenseCreative Commons Attribution 4.0 International Licenseen_AU
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_AU
dc.sourceScientific Reportsen_AU
dc.titleMechanism of Photodamage of the Oxygen Evolving Mn Cluster of Photosystem II by Excessive Light Energyen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue1en_AU
local.bibliographicCitation.lastpage8en_AU
local.bibliographicCitation.startpage1en_AU
local.contributor.affiliationZavaleta Fernandez de Cordova, Alonso, College of Science, ANUen_AU
local.contributor.affiliationKoinuma, Wataru, Nagoya Universityen_AU
local.contributor.affiliationChow, Wah, College of Science, ANUen_AU
local.contributor.affiliationCheah, Mun Hon (Michael), College of Science, ANUen_AU
local.contributor.affiliationMino, Hiroyuki, Nagoya University,en_AU
local.contributor.authoruidZavaleta Fernandez de Cordova, Alonso, u4932188en_AU
local.contributor.authoruidChow, Wah, u9609696en_AU
local.contributor.authoruidCheah, Mun Hon (Michael), u5310913en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor060705 - Plant Physiologyen_AU
local.identifier.absseo820215 - Vegetablesen_AU
local.identifier.ariespublicationa383154xPUB8325en_AU
local.identifier.citationvolume7en_AU
local.identifier.doi10.1038/s41598-017-07671-1en_AU
local.identifier.scopusID2-s2.0-85027178697
local.identifier.thomsonID000407180400034
local.publisher.urlhttp://www.nature.com/srep/index.htmlen_AU
local.type.statusPublished Versionen_AU

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