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Hydroxyl radicals are not the protagonists of UV-B induced damage in isolated thylakoid membranes.

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F07%3A00004841" target="_blank" >RIV/61989592:15310/07:00004841 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Hydroxyl radicals are not the protagonists of UV-B induced damage in isolated thylakoid membranes.

  • Original language description

    The production of reactive oxygen species (ROS) was studied in isolated thylakoid membranes exposed to 312 nm UV-B irradiation. Hydroxyl radicals (-OH) and hydrogen peroxide were measured directly, using a newly developed method based on hydroxylation ofterephthalic acid and the homovanillic acid/peroxidase assay, respectively. At the early stage of UV-B stress (doses lower than 2.0 J cm/-2), -OH were derived from superoxide radicals via hydrogen peroxide. Production of these ROS was dependent on photosynthetic electron transport and was not exclusive to UV-B. Both ROS were found in samples exposed to the same doses of PAR, suggesting that the observed ROS are by-products of the UV-B driven electron transport rather than specific initiators of the UV-B-induced damage. After longer exposure of thylakoids to UV-B, leading to the inactivation of PSII centres, a small amount of -OH was still observed in thylakoids, even though no free hydrogen peroxide was detected.

  • Czech name

    Hydroxylové radikály nejsou protagonisté poškození izolovaných thylakoidních membrán pomocí UV-B.

  • Czech description

    V práci bylo zjištěno, že v ranném stádiu působeni UV-B produkce reaktivních forem kyslíku (hydroxalové radikály a peroxid vodíku) závisí na elektronovém transportu a ne výhradně na UV-B.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BO - Biophysics

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Functional Plant Biology

  • ISSN

    1445-4408

  • e-ISSN

  • Volume of the periodical

    34

  • Issue of the periodical within the volume

    12

  • Country of publishing house

    AU - AUSTRALIA

  • Number of pages

    10

  • Pages from-to

    1112-1121

  • UT code for WoS article

  • EID of the result in the Scopus database