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Protective effect of UV-A radiation during acclimation of the photosynthetic apparatus to UV-B treatment

SYSNO ASEP	0446355
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Protective effect of UV-A radiation during acclimation of the photosynthetic apparatus to UV-B treatment
Tvůrce(i)	Štroch, Michal (UEK-B)_{RID, SAI, ORCID} Materová, Z. (CZ) Vrábl, D. (CZ) Karlický, Václav (UEK-B)_{ORCID, RID, SAI} Šigut, Ladislav (UEK-B)_{RID, ORCID, SAI} Nezval, J. (CZ) Špunda, Vladimír (UEK-B)_{ORCID, SAI, RID}
Zdroj.dok.	Plant Physiology and Biochemistry. - : Elsevier - ISSN 0981-9428 Roč. 96, nov (2015), s. 90-96
Poč.str.	7 s.
Jazyk dok.	eng - angličtina
Země vyd.	FR - Francie
Klíč. slova	barley (Hordeum vulgare L.) ; chlorophyll fluorescence ; photosynthesis ; photosynthetic pigments ; UV-A radiation ; UV-B radiation
Vědní obor RIV	BO - Biofyzika
CEP	LO1415 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
	LM2010007 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	RVO:67179843 - RVO:67179843
UT WOS	000364880500011
EID SCOPUS	84938347594
DOI	10.1016/j.plaphy.2015.07.017
Anotace	We examined the acclimation response of the photosynthetic apparatus of barley (Hordeum vulgare L.) to a combination of UV-A and UV-B radiation (UVAB) and to UV-B radiation alone. Our aim was to evaluate whether UV-A radiation prevents UV-B-induced damage to the photosynthetic apparatus and whether UV-A pre-acclimation is required to mitigate the negative influence of UV-B radiation. Barley plants were grown from seeds under low photosynthetically active radiation (50 μmol m−2 s−1) either in the absence or presence of UV-A radiation (UVA− and UVA+ plants, respectively). After 8 days of development, plants were exposed simultaneously to UV-A and UV-B radiation for the next 6 days. Additionally, UVA− plants were exposed to UV-B radiation alone. The UVA+ plants had a higher CO2 assimilation rate near the light-saturation region (AN) and a higher content of both total chlorophylls (Chls) and total carotenoids than the UVA− plants. Chls content, AN, the potential quantum yield of photosystem II (PSII) photochemistry (FV/FM), the capacity of light-induced thermal energy dissipation and the efficiency of excitation energy transfer within PSII remained the same or even increased in both UVA+ and UVA− plants after UVAB treatment. On the contrary, exposure of UVA− plants to UV-B radiation itself led to a reduction in all these characteristics. We revealed that the presence of UV-A radiation during UVAB treatment not only mitigated but completely eliminated the negative effect of UV-B radiation on the functioning of the photosynthetic apparatus and that UV-A pre-acclimation was not crucial for development of this UV-A-induced resistance against UV-B irradiation.
Pracoviště	Ústav výzkumu globální změny
Kontakt	Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268
Rok sběru	2016

Počet záznamů: 1