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Complex phytohormone responses during the cold acclimation of two wheat cultivars differing in cold tolerance, winter Samanta and spring Sandra

SYSNO ASEP	0380692
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Complex phytohormone responses during the cold acclimation of two wheat cultivars differing in cold tolerance, winter Samanta and spring Sandra
Author(s)	Kosová, K. (CZ) Prášil, I.T. (CZ) Vítámvás, P. (CZ) Dobrev, Petre (UEB-Q)_{RID, ORCID} Motyka, Václav (UEB-Q)_{RID, ORCID} Floková, Kristýna (UEB-Q)_{ORCID, RID} Novák, Ondřej (UEB-Q)_{RID, ORCID, SAI} Turečková, Veronika (UEB-Q)_{RID, ORCID} Rolčík, Jakub (UEB-Q) Pešek, Bedřich (UEB-Q)_RID Trávníčková, Alena (UEB-Q)_ORCID Gaudinová, Alena (UEB-Q)_ORCID Galiba, G. (HU) Janda, T. (HU) Vlasáková, E. (CZ) Prášilová, P. (CZ) Vaňková, Radomíra (UEB-Q)_{RID, ORCID}
Source Title	Journal of Plant Physiology. - : Elsevier - ISSN 0176-1617 Roč. 169, č. 6 (2012), s. 567-576
Number of pages	10 s.
Language	eng - English
Country	PT - Portugal
Keywords	Cold stress ; Dehydrin ; Frost tolerance
Subject RIV	ED - Physiology
R&D Projects	GA522/09/2058 GA ČR - Czech Science Foundation (CSF)
	MEB040713 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	MEB040924 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z50380511 - UEB-Q (2005-2011)
UT WOS	000302892800003
DOI	10.1016/j.jplph.2011.12.013
Annotation	Hormonal changes accompanying the cold stress (4 ◦C) response that are related to the level of frost tolerance (FT; measured as LT50) and the content of the most abundant dehydrin, WCS120, were compared in the leaves and crowns of the winter wheat (Triticum aestivum L.) cv. Samanta and the spring wheat cv. Sandra. The characteristic feature of the alarm phase (1 day) response was a rapid elevation of abscisic acid (ABA) and an increase of protective proteins (dehydrin WCS120). This response was faster and stronger in winter wheat, where it coincided with the downregulation of bioactive cytokinins and auxin as well as enhanced deactivation of gibberellins, indicating rapid suppression of growth. Next, the ethylene precursor aminocyclopropane carboxylic acid was quickly upregulated. After 3–7 days of cold exposure, plant adaptation to the low temperature was correlated with a decrease in ABA and elevation of growth-promoting hormones (cytokinins, auxin and gibberellins). The content of other stress hormones, i.e., salicylic acid and jasmonic acid, also began to increase. After prolonged cold exposure (21 days), a resistance phase occurred. The winter cultivar exhibited substantially enhanced FT, which was associated with a decline in bioactive cytokinins and auxin. The inability of the spring cultivar to further increase its FT was correlated with maintenance of a relatively higher cytokinin and auxin content, which was achieved during the acclimation period.
Workplace	Institute of Experimental Botany
Contact	David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469
Year of Publishing	2013

Number of the records: 1