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Heat-stress response of photosystem II in five ecologically important tree species of European temperate forests
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SYSNO ASEP 0556996 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Heat-stress response of photosystem II in five ecologically important tree species of European temperate forests Author(s) Hudokova, H. (SK)
Petrik, Peter (UEK-B) RID, ORCID, SAI
Petek-Petrik, Anja (BU-J) ORCID, RID, SAI
Konôpková, J. (SK)
Lestianska, A. (SK)
Střelcová, K. (SK)
Kmeť, J. (SK)
Kurjak, D. (SK)Source Title Biologia. - : Springer - ISSN 0006-3088
Roč. 77, č. 3 (2022), s. 671-680Number of pages 10 s. Language eng - English Country US - United States Keywords pigment composition ; fluorescence ; thermostability ; acclimation ; photochemistry ; carotenoids ; performance ; growth ; light ; photosynthesis ; Assimilatory pigments ; Interspecific variability ; OKJIP test ; Thermostability ; Thermotolerance of PSII Subject RIV EF - Botanics OECD category Plant sciences, botany Subject RIV - cooperation Institute of Botany - Botanics Method of publishing Limited access Institutional support UEK-B - RVO:86652079 ; BU-J - RVO:67985939 UT WOS 000744370800001 EID SCOPUS 85123212027 DOI 10.1007/s11756-021-00958-9 Annotation Heat negatively affects photosynthesis, thus tree growth and eventually survivability. The light-dependent photosynthesis reactions are considered highly heat sensitive, therefore, we studied the impact of supra-optimal temperatures on photosystem II (PSII) in five important tree species (Abies alba, Fagus sylvatica, Picea abies, Pinus sylvestris and Quercus petraea agg.). We simulated short-term heat stress at different levels and assessed PSII thermotolerance via fluorescence parameters derived from the OKJIP transient. To capture the seasonal changes in PSII thermostability and the stress tolerance index, the measurements were performed twice: at the beginning of the vegetation season before the natural heat events occurred and during the peak of the vegetation season. Moreover, the content of photosynthesis-related pigments was analysed. We confirmed the relationship between the appearance of the K-step at the OKJIP curve and the concentrations of photosynthesis-related pigments. We found that broadleaved tree species showed overall higher PSII thermostability and had a higher content of pigments than coniferous species. The most heat-tolerant species was Q. petraea agg., which presented enhanced PSII thermotolerance after heat events. F. sylvatica responded by a decrease in PSII thermostability during the vegetation season, though its thermostability was still higher than that of the coniferous species and was comparable to that of Q. petraea agg. The PSII thermotolerance of P. abies was relatively high compared to that of the other coniferous species on both dates, but its response was inconsistent across the assessed parameters. Contrary, the PSII thermostability of A. alba and P. sylvestris was generally low on both measurement dates. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2023 Electronic address https://link.springer.com/article/10.1007/s11756-021-00958-9
Number of the records: 1