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The Effect of White Light Spectrum Modifications by Excess of Blue Light on the Frost Tolerance, Lipid- and Hormone Composition of Barley in the Early Pre-Hardening Phase
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SYSNO ASEP 0569140 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Effect of White Light Spectrum Modifications by Excess of Blue Light on the Frost Tolerance, Lipid- and Hormone Composition of Barley in the Early Pre-Hardening Phase Author(s) Ahres, M. (HU)
Pálmai, T. (HU)
Kovács, T. (HU)
Kovács, L. (HU)
Lacek, Jozef (UEB-Q) ORCID
Vaňková, Radomíra (UEB-Q) RID, ORCID
Galiba, G. (HU)
Borbély, P. (HU)Number of authors 8 Article number 40 Source Title Plants. - : MDPI
Roč. 12, č. 1 (2023)Number of pages 19 s. Language eng - English Country CH - Switzerland Keywords barley ; cold acclimation ; light regulation ; light-emitting diode (LED) lighting ; lipidome ; phytohormones OECD category Plant sciences, botany Method of publishing Open access Institutional support UEB-Q - RVO:61389030 UT WOS 000910234700001 EID SCOPUS 85145841168 DOI 10.3390/plants12010040 Annotation It is well established that cold acclimation processes are highly influenced, apart from cold ambient temperatures, by light-dependent environmental factors. In this study we investigated whether an extra blue (B) light supplementation would be able to further improve the well-documented freezing tolerance enhancing effect of far-red (FR) enriched white (W) light. The impact of B and FR light supplementation to white light (WFRB) on hormone levels and lipid contents were determined in winter barley at moderate (15 °C) and low (5 °C) temperatures. Low R:FR ratio effectively induced frost tolerance in barley plantlets, but additional B light further enhanced frost hardiness at both temperatures. Supplementation of WFR (white light enriched with FR light) with B had a strong positive effect on abscisic acid accumulation while the suppression of salicylic acid and jasmonic acid levels were observed at low temperature which resembles the shade avoidance syndrome. We also observed clear lipidomic differences between the individual light and temperature treatments. WFRB light changed the total lipid content negatively, but monogalactosyldiacylglycerol (MGDG) content was increased, nonetheless. Our results prove that WFRB light can greatly influence phytohormone dynamics and lipid contents, which eventually leads to more efficient pre-hardening to avoid frost damage. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2023 Electronic address https://doi.org/10.3390/plants12010040
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