Operation of dual mechanisms that both lead to photoinactivation of Photosystem II in leaves by visible light
-
Altmetric Citations
Oguchi, Riichi; Terashima, Ichiro; Kou, Jiancun; Chow, Wah Soon
Description
Photosystem II (PS II) is photoinactivated during photosynthesis, requiring repair to maintain full function during the day. What is the mechanism(s) of the initial events that lead to photoinactivation of PS II? Two hypotheses have been put forward. The ‘excess-energy hypothesis' states that excess energy absorbed by chlorophyll (Chl), neither utilized in photosynthesis nor dissipated harmlessly in non-photochemical quenching, leads to PS II photoinactivation; the ‘Mn hypothesis' (also termed...[Show more]
dc.contributor.author | Oguchi, Riichi | |
---|---|---|
dc.contributor.author | Terashima, Ichiro | |
dc.contributor.author | Kou, Jiancun | |
dc.contributor.author | Chow, Wah Soon | |
dc.date.accessioned | 2014-05-09T00:16:11Z | |
dc.date.available | 2014-05-09T00:16:11Z | |
dc.identifier.issn | 0031-9317 | |
dc.identifier.uri | http://hdl.handle.net/1885/11639 | |
dc.description.abstract | Photosystem II (PS II) is photoinactivated during photosynthesis, requiring repair to maintain full function during the day. What is the mechanism(s) of the initial events that lead to photoinactivation of PS II? Two hypotheses have been put forward. The ‘excess-energy hypothesis' states that excess energy absorbed by chlorophyll (Chl), neither utilized in photosynthesis nor dissipated harmlessly in non-photochemical quenching, leads to PS II photoinactivation; the ‘Mn hypothesis' (also termed the two-step hypothesis) states that light absorption by the Mn cluster in PS II is the primary effect that leads to dissociation of Mn, followed by damage to the reaction centre by light absorption by Chl. Observations from various studies support one or the other hypothesis, but each hypothesis alone cannot explain all the observations. We propose that both mechanisms operate in the leaf, with the relative contribution from each mechanism depending on growth conditions or plant species. Indeed, in a single system, namely, the interior of a leaf, we could observe one or the other mechanism at work, depending on the location within the tissue. There is no reason to expect the two mechanisms to be mutually exclusive. | |
dc.description.sponsorship | This work was supported by a JSPS Research Fellowship for Young Scientists (18-8553 to R. O.); a JSPS Postdoctoral Fellowships for Research Abroad (to R. O.); an Australian Research Council (DP1093827 to W. S. C.); a China Scholarship Council Fellowship (to J. K.) and a Grant-in-Aid for Challenging Exploratory Research (21657007 to I. T.). | |
dc.format | 9 pages | |
dc.publisher | Wiley | |
dc.rights | Copyright © Physiologia Plantarum 2011 | |
dc.source | Physiologia Plantarum 142.1 (2011): 47-55 | |
dc.subject | Photosystem II | |
dc.subject | photoinactivation | |
dc.subject | leaves | |
dc.title | Operation of dual mechanisms that both lead to photoinactivation of Photosystem II in leaves by visible light | |
dc.type | Journal article | |
local.identifier.citationvolume | 142 | |
dc.date.issued | 2011-05 | |
local.identifier.absfor | 060705 - Plant Physiology | |
local.identifier.ariespublication | f2965xPUB1700 | |
local.publisher.url | http://eu.wiley.com/WileyCDA/ | |
local.type.status | Published Version | |
local.contributor.affiliation | Oguchi, Riichi, Division of Plant Science, Research School of Biology, College of Medicine, Biology and Environment, The Australian National University | |
local.contributor.affiliation | Kou, Jiancun, Division of Plant Science, Research School of Biology, College of Medicine, Biology and Environment, The Australian National University | |
local.contributor.affiliation | Chow, Wah Soon, Division of Plant Science, Research School of Biology, College of Medicine, Biology and Environment, The Australian National University | |
dc.relation | http://purl.org/au-research/grants/arc/dp1093827 | |
local.bibliographicCitation.issue | 1 | |
local.bibliographicCitation.startpage | 47 | |
local.bibliographicCitation.lastpage | 55 | |
local.identifier.doi | 10.1111/j.1399-3054.2011.01452.x | |
local.identifier.absseo | 820399 - Industrial Crops not elsewhere classified | |
dc.date.updated | 2015-12-10T11:10:18Z | |
local.identifier.scopusID | 2-s2.0-79954585457 | |
local.identifier.thomsonID | 000289470800006 | |
Collections | ANU Research Publications |
Download
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.
Updated: 17 November 2022/ Responsible Officer: University Librarian/ Page Contact: Library Systems & Web Coordinator