About: Formation of superoxide anion and carbon-centered radicals by photosystem II under high light and heat stress-EPR spin-trapping study

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About: Formation of superoxide anion and carbon-centered radicals by photosystem II under high light and heat stress-EPR spin-trapping study Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In this study, electron paramagnetic resonance spin-trapping technique was used to study the light-induced production of superoxide anion (O2?-) and carbon-centered (R?) radicals by Photosystem II (PSII). It is evidenced here that exposure of PSII membranes to high light (2000 micromol photons m-2 s-1) or heat (47 °C) treatments prior to the illumination suppressed O2?- production, while R? was formed. Formation of R? in the both high light- and heat-treated PSII membranes was enhanced by DCMU. Removal of molecular oxygen by glucose/glucose oxidase/catalase system and O2?- scavenging by exogenous superoxide dismutase completely suppressed carbon-centered radical formation. It is proposed here that the oxidation of polyunsaturated fatty or amino acid by O2?- on the electron acceptor side of PSII results in the formation of R?, known to initiate a cascade reaction leading to the lipid peroxidation and protein degradation. In this study, electron paramagnetic resonance spin-trapping technique was used to study the light-induced production of superoxide anion (O2?-) and carbon-centered (R?) radicals by Photosystem II (PSII). It is evidenced here that exposure of PSII membranes to high light (2000 micromol photons m-2 s-1) or heat (47 °C) treatments prior to the illumination suppressed O2?- production, while R? was formed. Formation of R? in the both high light- and heat-treated PSII membranes was enhanced by DCMU. Removal of molecular oxygen by glucose/glucose oxidase/catalase system and O2?- scavenging by exogenous superoxide dismutase completely suppressed carbon-centered radical formation. It is proposed here that the oxidation of polyunsaturated fatty or amino acid by O2?- on the electron acceptor side of PSII results in the formation of R?, known to initiate a cascade reaction leading to the lipid peroxidation and protein degradation. (en)
Title	Formation of superoxide anion and carbon-centered radicals by photosystem II under high light and heat stress-EPR spin-trapping study Formation of superoxide anion and carbon-centered radicals by photosystem II under high light and heat stress-EPR spin-trapping study (en)
skos:prefLabel	Formation of superoxide anion and carbon-centered radicals by photosystem II under high light and heat stress-EPR spin-trapping study Formation of superoxide anion and carbon-centered radicals by photosystem II under high light and heat stress-EPR spin-trapping study (en)
skos:notation	RIV/61989592:15310/13:33145242!RIV14-MSM-15310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(ED0007/01/01), P(EE2.3.20.0057)
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Rác, Marek Pospíšil, Pavel Tiwari, Arjun
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Palackého v Olomouci / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	75529
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/13:33145242
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Redox potential; Reactive oxygen species; Photosystem II; Photoinhibition; Heat stress (en)
http://linked.open.../riv/klicoveSlovo	Photosystem II Redox potential Reactive oxygen species Photoinhibition Heat stress
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[DF9EF9A2DA3B]
http://linked.open...i/riv/nazevZdroje	Journal of Bioenergetics and Biomembranes
http://linked.open...in/vavai/riv/obor	BO
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Progress and internationalization of biophysical research at Faculty of Science, Palacky University in Olomouc Centre of the Region Haná for Biotechnological and Agricultural Research
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	45
http://linked.open...iv/tvurceVysledku	Pospíšil, Pavel Rác, Marek Tiwari, Arjun
http://linked.open...ain/vavai/riv/wos	000327082100005
issn	0145-479X
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s10863-013-9523-y
http://localhost/t...ganizacniJednotka	15310

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