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Acclimation of Norway spruce photosynthetic apparatus to the combined effect of high irradiance and temperature
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SYSNO ASEP 0358656 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Acclimation of Norway spruce photosynthetic apparatus to the combined effect of high irradiance and temperature Tvůrce(i) Štroch, M. (CZ)
Vrábl, D. (CZ)
Podolinská, J. (CZ)
Kalina, J. (CZ)
Urban, Otmar (UEK-B) RID, ORCID, SAI
Špunda, V. (CZ)Zdroj.dok. Journal of Plant Physiology. - : Elsevier - ISSN 0176-1617
Roč. 167, č. 8 (2010), s. 597-605Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. PT - Portugalsko Klíč. slova diurnal courses ; picea abies ; thermal acclimation ; thermal energy dissipation ; xanthophyll cycle Vědní obor RIV ED - Fyziologie CEP GA522/07/0759 GA ČR - Grantová agentura ČR CEZ AV0Z60870520 - UEK-B (2005-2011) UT WOS 000278019200002 DOI 10.1016/j.jplph.2009.11.011 Anotace Diurnal courses of photosynthetic parameters, chlorophyll fluorescence and de-epoxidation state of xanthophyll cycle pigments (DEPS) were measured during the acclimation of spruce seedlings to regimes simulated cold cloudy days (LI treatment), cold sunny days (HI), and hot sunny days (HI-HT). Acclimation to HI and HI-HT led to a strong depression in CO2 assimilation (AN), particularly during noon and afternoon. Insufficient stomatal conductance was the main reason of reduced AN. Negligible changes in maximum photochemical efficiency of photosystem (PS) II support the resistance of spruce against PSII photoinhibition. The HI plants had higher content of xanthophyll cycle pigments (VAZ) and enhanced efficiency of thermal energy dissipation (D) that correlated with DEPS. In contrast, HI-HT plants had significantly lower D and DEPS values than HI plants. These results indicate a minor role of the xanthophyll-mediated thermal dissipation in PSII photoprotection under elevated temperatures. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2012
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