Production of reactive oxygen species by Photosystem II.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F05%3A00002229" target="_blank" >RIV/61989592:15310/05:00002229 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Production of reactive oxygen species by Photosystem II.
Original language description
Molecular oxygen released as a by-product of photosynthetic water oxidation acts in two different ways in the photosynthetic processes: 1) O2 is used as a sink for electrons and 2) O2 is a source of reactive oxygen species (ROS). Oxygen is reduced in successive univalent reactions to form superoxide radical (O2 -), hydrogen peroxide (H2O2) and hydroxyl radical (OH ). Production of O2 - was demonstrated using either an assay involving of cytochrome c reduction in the presence of xanthine/xanthine oxidaseor voltametric methods. The production of H2O2 was suggested to originate either from the dismutation of O2 - or incomplete oxidation of water. Using spin-trapping EPR technique it has been demonstrated that illumination of PSII membranes results in theformation of OH . In the present study, EPR spin-trapping spectroscopy was used to investigate light-induced production of ROS in PSII membranes. We have found that O2 - production on PSII acceptor side initiated formation of OH via two
Czech name
Tvorba reaktivních forem kyslíku fotosystémem II.
Czech description
Pomocí EPR spektroskopie byla studována tvorba reaktivních form kyslíku na PSII membránnách. Bylo zjištěno, že na akceptorové straně PSII dochází k tvorbě OH pomocí dvou možných mechanismů, které vedou k tvorbě vázaného a volného peroxidu vodíku. Získanévýsledky byly diskutovány vzhledem ke známým faktům.
Classification
Type
D - Article in proceedings
CEP classification
BO - Biophysics
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Photosynthesis: Fundamental Aspects to Global Perspectives (Proceedings of the 13th International Congress on Photosynthesis; CD-ROM).
ISBN
1-891276-39-5
ISSN
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e-ISSN
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Number of pages
1000
Pages from-to
497-498
Publisher name
Allen Press
Place of publication
Montreal, Kanada
Event location
Montreal, Kanada
Event date
Jan 1, 2005
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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