Low temperature and oxidative stress in cereals

G. Kocsy, Magda Pál, A. Soltész, G. Szalai, Ã Boldizsár, V. Kovács, T. Janda

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Low temperature stress results in significant yield losses in cereals. Cereals of subtropical origin like maize and rice are severely damaged at temperatures below 10°C and are killed at subzero temperatures. This stress effect is called chilling. In contrast, cereals originating from the temperate zone (wheat, barley, rye and oat) may survive short periods even between -10 and -20°C, depending on the species and varieties, so they are freezing-tolerant to various extents. For the winter type of these cereals a gradual decrease in temperature up to -4°C results in cold acclimation, which increases their freezing tolerance. In addition, it fulfils their vernalization requirement, which is necessary for the correct timing of the vegetative to generative transition. During both chilling and freezing, oxidative stress is induced. Although the accumulation of high concentrations of reactive oxygen species may be lethal, a moderate increase in their level may activate various defence mechanisms. In this review the role of reactive oxygen species, antioxidants, carbohydrates, free amino acids, polyamines and hormones in the response to low temperature stress in cereals will be described. The effect of light and the use of the model plant Brachypodium distachyon L. to reveal the biochemical and molecular biological background of this response will also be discussed.

Original languageEnglish
Pages (from-to)153-173
Number of pages21
JournalActa Agronomica Hungarica
Volume59
Issue number2
DOIs
Publication statusPublished - Jun 1 2011

Keywords

  • antioxidants
  • cereals
  • chilling
  • cold acclimation
  • freezing
  • photoinhibition
  • reactive oxygen species
  • redox signalling

ASJC Scopus subject areas

  • Agronomy and Crop Science

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