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

Klára Kosová, Ilja Tom Prášil, Pavel Vítámvás, Petre Dobrev, Václav Motyka, Kristýna Floková, Ondřej Novák, Veronika Turečková, Jakub Rolčik, Bedřich Pešek, Alena Trávničková, Alena Gaudinová, Gabor Galiba, Tibor Janda, Eva Vlasáková, Pavla Prášilová, Radomíra Vanková

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Abstract

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.

Original languageEnglish
Pages (from-to)567-576
Number of pages10
JournalJournal of Plant Physiology
Volume169
Issue number6
DOIs
Publication statusPublished - ápr. 15 2012

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ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

Cite this

Kosová, K., Prášil, I. T., Vítámvás, P., Dobrev, P., Motyka, V., Floková, K., Novák, O., Turečková, V., Rolčik, J., Pešek, B., Trávničková, A., Gaudinová, A., Galiba, G., Janda, T., Vlasáková, E., Prášilová, P., & Vanková, R. (2012). Complex phytohormone responses during the cold acclimation of two wheat cultivars differing in cold tolerance, winter Samanta and spring Sandra. Journal of Plant Physiology, 169(6), 567-576. https://doi.org/10.1016/j.jplph.2011.12.013