Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 353257
Title Evidence for the semireduced primary quinone electron acceptor of photosystem II being a photosensitizer for UVB damage to the photosynthetic apparatus
Author(s) Rodrigues, G.C.; Jansen, M.A.K.; Noort, M.E. van den; Rensen, J.J.S. van
Source Plant Science 170 (2006)2. - ISSN 0168-9452 - p. 283 - 290.
Department(s) Laboratory of Plant Physiology
FM Kwaliteit Arbo & Milieu (WUATV)FM Kwaliteit Arbo & Milieu
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) ultraviolet-b radiation - triazine-resistant - chloroplast reactions - active radiation - reducing side - d2 protein - degradation - photoinhibition - leaves - donor
Abstract Exposure to ultraviolet-B radiation (UVB) radiation affects plants in multiple ways, including effects on the photosynthetic apparatus. The carbon dioxide reduction reactions are affected as well as the light reactions, especially those of photosystem II. In the literature several UVB chromophores are suggested, including redox-active tyrosines, plastosemiquinones, and the manganese cluster of the water-splitting complex. We measured the damage by UVB radiation given together with a small component of photosynthetically active radiation (PAR) in a triazine-resistant biotype and a wild-type of Chenopodium album. The damage was estimated by chlorophyll fluorescence measurements and was larger in the resistant plants. We were able to show that the concentration of the semireduced primary quinone electron acceptor of photosystem II is higher in the resistant plants, under all radiation conditions tested. This finding and additional results support the hypothesis that plastosemiquinones are photosensitizers for UVB radiation
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