Počet záznamů: 1
Cytokinins act synergistically with heat acclimation to enhance rice thermotolerance affecting hormonal dynamics, gene expression and volatile emission
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SYSNO ASEP 0572057 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Cytokinins act synergistically with heat acclimation to enhance rice thermotolerance affecting hormonal dynamics, gene expression and volatile emission Tvůrce(i) Přerostová, Sylva (UEB-Q) RID, ORCID, SAI
Rezek, Jan (UEB-Q) RID, ORCID
Jarošová, Jana (UEB-Q) ORCID
Lacek, Jozef (UEB-Q) ORCID
Dobrev, Petre (UEB-Q) RID, ORCID
Maršík, Petr (UEB-Q) RID, ORCID
Gaudinová, Alena (UEB-Q) ORCID
Knirsch, Vojtěch (UEB-Q) ORCID
Doležal, Karel (UEB-Q) RID, ORCID
Plíhalová, Lucie (UEB-Q) ORCID, RID
Vaněk, Tomáš (UEB-Q) RID, ORCID
Kieber, J.J. (US)
Vaňková, Radomíra (UEB-Q) RID, ORCIDCelkový počet autorů 13 Číslo článku 107683 Zdroj.dok. Plant Physiology and Biochemistry. - : Elsevier - ISSN 0981-9428
Roč. 198, MAY (2023)Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Acclimation ; Cytokinin ; Heat stress ; Phytohormone ; Priming ; Thermotolerance ; Volatile organic compound Obor OECD Plant sciences, botany CEP LTAUSA17081 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy EF16_019/0000738 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA20-22875S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UEB-Q - RVO:61389030 UT WOS 000984583800001 EID SCOPUS 85152450491 DOI 10.1016/j.plaphy.2023.107683 Anotace Heat stress is a frequent environmental constraint. Phytohormones can significantly affect plant thermotolerance. This study compares the effects of exogenous cytokinin meta-topolin-9-(tetrahydropyran-2-yl)purine (mT9THP) on rice (Oryza sativa) under control conditions, after acclimation by moderate temperature (A, 37 °C, 2h), heat stress (HS, 45 °C, 6h) and their combination (AHS). mT9THP is a stable cytokinin derivative that releases active meta-topolin gradually, preventing the rapid deactivation reported after exogenous cytokinin application. Under control conditions, mT9THP negatively affected jasmonic acid in leaves and abscisic and salicylic acids in crowns (meristematic tissue crucial for tillering). Exogenous cytokinin stimulated the emission of volatile organic compounds (VOC), especially 2,3-butanediol. Acclimation upregulated trans-zeatin, expression of stress- and hormone-related genes, and VOC emission. The combination of acclimation and mT9THP promoted the expression of stress markers and antioxidant enzymes and moderately increased VOC emission, including 2-ethylhexyl salicylate or furanones. AHS and HS responses shared some common features, namely, increase of ethylene precursor aminocyclopropane-1-carboxylic acid (ACC), cis-zeatin and cytokinin methylthio derivatives, as well as the expression of heat shock proteins, alternative oxidases, and superoxide dismutases. AHS specifically induced jasmonic acid and auxin indole-3-acetic acid levels, diacylglycerolipids with fewer double bonds, and VOC emissions [e.g., acetamide, lipoxygenase (LOX)-derived volatiles]. Under direct HS, exogenous cytokinin mimicked some positive acclimation effects. The combination of mT9THP and AHS had the strongest thermo-protective effect, including a strong stimulation of VOC emissions (including LOX-derived ones). These results demonstrate for the first time the crucial contribution of volatiles to the beneficial effects of cytokinin and AHS on rice thermotolerance. Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2024 Elektronická adresa https://doi.org/10.1016/j.plaphy.2023.107683
Počet záznamů: 1