Analysis of OJIP transients during photoinactivation of photosystem ii indicates the presence of multiple photosensitizers in vivo and in vitro

Iermak, I; Szabó, M; Zavafer, A

Analysis of OJIP transients during photoinactivation of photosystem ii indicates the presence of multiple photosensitizers in vivo and in vitro

Iermak, I Szabó, M Zavafer, A

Permalink

Publisher:: ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
Publication Type:: Journal Article
Citation:: Photosynthetica, 2020, 58, (Special Issue), pp. 497-506
Issue Date:: 2020-01-01

In Progress

	Filename	Description	Size
	Photosynthetica_phs-202002-0032.pdf	Published version	1.56 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is being processed and is not currently available.

Full metadata record

Field	Value	Language
dc.contributor.author	Iermak, I
dc.contributor.author	Szabó, M
dc.contributor.author	Zavafer, A
dc.date.accessioned	2020-10-22T04:25:21Z
dc.date.available	2020-10-22T04:25:21Z
dc.date.issued	2020-01-01
dc.identifier.citation	Photosynthetica, 2020, 58, (Special Issue), pp. 497-506
dc.identifier.issn	0300-3604
dc.identifier.issn	1573-9058
dc.identifier.uri	http://hdl.handle.net/10453/143468
dc.description.abstract	© The authors. Generally, excessive excitation absorbed by the pigments is considered the cause of PSII photodamage. Previous studies of action spectra of PSII photodamage concluded that shorter wavelengths induce more damage, supporting the hypothesis of the existence of more than one photosensitizer. However, the relative influence of different photosensitizers is still inconclusive. In this work, we have revisited this question by inducing PSII photodamage in vivo and in vitro at two different wavelengths (460 and 660 nm) where the net absorption cross section was the same using equal irradiance. To correlate PSII photodamage with each wavelength band, we followed its time course using the OJIP transient of the chlorophyll fluorescence to determine the possible contributions of photoinhibition by different photosensitizers. We found evidence that at least two sites of photoinactivation of PSII exist.
dc.language	English
dc.publisher	ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
dc.relation.ispartof	Photosynthetica
dc.relation.isbasedon	10.32615/ps.2019.166
dc.rights	© The authors. This is an open access article distributed under the terms of the Creative Commons BY-NC-ND Licence.
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0607 Plant Biology
dc.subject.classification	Plant Biology & Botany
dc.title	Analysis of OJIP transients during photoinactivation of photosystem ii indicates the presence of multiple photosensitizers in vivo and in vitro
dc.type	Journal Article
utslib.citation.volume	58
utslib.for	0607 Plant Biology
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	in_progress	*
pubs.consider-herdc	false
dc.date.updated	2020-10-22T04:24:44Z
pubs.issue	Special Issue
pubs.publication-status	Published
pubs.volume	58
utslib.citation.issue	Special Issue

Abstract:

© The authors. Generally, excessive excitation absorbed by the pigments is considered the cause of PSII photodamage. Previous studies of action spectra of PSII photodamage concluded that shorter wavelengths induce more damage, supporting the hypothesis of the existence of more than one photosensitizer. However, the relative influence of different photosensitizers is still inconclusive. In this work, we have revisited this question by inducing PSII photodamage in vivo and in vitro at two different wavelengths (460 and 660 nm) where the net absorption cross section was the same using equal irradiance. To correlate PSII photodamage with each wavelength band, we followed its time course using the OJIP transient of the chlorophyll fluorescence to determine the possible contributions of photoinhibition by different photosensitizers. We found evidence that at least two sites of photoinactivation of PSII exist.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/143468