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The thermostability of photosystem II photochemistry is related to maintenance of thylakoid membranes organization
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SYSNO ASEP 0456342 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název The thermostability of photosystem II photochemistry is related to maintenance of thylakoid membranes organization Tvůrce(i) Karlický, Václav (UEK-B) ORCID, RID, SAI
Kurasová, I. (CZ)
Špunda, Vladimír (UEK-B) ORCID, SAI, RIDZdroj.dok. Global Change: A Complex Challenge : Conference Proceedings. - Brno : Global Change Research Centre, The Czech Academy of Sciences, v. v. i., 2015 / Urban Otmar ; Šprtová Mirka ; Klem Karel - ISBN 978-80-87902-10-3 Rozsah stran s. 142-145 Poč.str. 4 s. Forma vydání Tištěná - P Akce Global Change: A Complex Challenge /4th/ Datum konání 23.03.2015-24.03.2015 Místo konání Brno Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova membrane ; photosystem ; photochemistry Vědní obor RIV EH - Ekologie - společenstva CEP LO1415 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy ED1.1.00/02.0073 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA13-28093S GA ČR - Grantová agentura ČR Institucionální podpora RVO:67179843 - RVO:67179843 UT WOS 000381161600034 Anotace For higher plant photosynthetic reactions, responses to the temperature changes are important, particularly if we consider global warming and the increasing frequency of extreme temperature fluctuations. High temperature stress decreases photosynthetic assimilation through the inactivation of photosystem II (PSII), the most heat-sensitive component of the oxygen-evolving complex. We have recently found higher thermostability of spruce PSII photochemistry compared to such control plants as Arabidopsis species and barley. In this work, we have therefore attempted to describe the causes of this effect on the level of the organization of pigment–protein complexes (PPCs) in spruce thylakoid membranes using circular dichroism (CD) spectroscopy. We have confirmed higher maximum efficiency of PSII photochemistry (FV/FM) for spruce needles in comparison to barley leaves. Temperature-dependent CD spectra have also demonstrated higher (by about 6°C) PSII thermostability of chiral macro-organization of PPCs in spruce thylakoid membranes compared to those in barley. However, thermal disruption of PPCs did not reveal significant differences. Our results demonstrate that the stability of PSII macro-organization in different plant species correlates with the thermostability of PSII photochemistry in intact needles/leaves and so effective PSII photochemistry is related to the maintenance of PSII macro-organization under high temperature stress. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2016
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