Does amount of light harvesting complexes play a role in the sensitivity of DCMU-treated Arabidopsis thaliana to high light stress?

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00029456" target="_blank" >RIV/00216224:14310/09:00029456 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Does amount of light harvesting complexes play a role in the sensitivity of DCMU-treated Arabidopsis thaliana to high light stress?
Original language description
Several fluorometric techniques, such as chlorophyll(Chl) fluorescence imaging, saturation pulse method, fast Chl fluorescence transients (OJIPs) were used to study photoinhibition and recovery in potted plants of A. thaliana. To address the role of light harvesting complexes(LHCs), wild type (wt-Columbia), npq (defective in zeaxanthin deepoxidase), and lhc (40 % reduction in LHCs) mutants were used. Responses to short-term (2000 microE m-2 s-1 PAR for 30 min) and long-term (300 microE m-2 s-1 PAR for 30 min plus PS II blocker DCMU) treatments were measured. In short-term experiment, photoinhibition of PS II was apparent as a decrease in Chl fluorescence in OJIPs, PS II quantum yield, and Fv/Fm ratio. The parameters, however, showed rapid recovery after 180 min in dark indicating high capacity of photoprotective mechanisms. Timecourses of Chl fluorescence parameters differed between wt, npq and lhc plants.
Czech name
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Czech description
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Project
<a href="/en/project/GA522%2F06%2F0979" target="_blank" >GA522/06/0979: Mechanisms of plant resistance against ROS induced in photosynthetic apparatus by a photoinhibitory stress</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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