Influence of abiotic stresses on the antioxidant enzyme activity of cereals

Balázs Varga, T. Janda, Emese László, O. Veisz

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The unfavourable effects of climate change were studied in terms of changes in the stress tolerance of cereals. Changes in the antioxidant enzyme activities were analysed as a function of the weather in a 2-year field experiment in order to determine the effect of extreme temperatures and rainfall conditions on the enzyme activity. The enzyme responses of two winter wheat genotypes to drought stress, simulated by withholding water completely for 7 days, were analysed under phytotronic conditions in three phenophases. The plants were raised either at ambient CO 2 concentration or at a doubled level. The quantities of glutathione reductase (GR), glutathione-S-transferase (GST), catalase (CAT), guaiacol peroxidase (POD) and ascorbate peroxidase (APX) were determined from leaf samples. The peroxidases had the most intense activity during the winter and early spring periods, with guaiacol peroxidase being dominant until the end of the winter. CAT generally became more active in late spring and summer, the activity being correlated with the development of water deficiency. The activity of GR, GST, POD and CAT was found to increase during the dry period, while the role of GR and POD was extremely important for resistance to low temperature.

Original languageEnglish
Pages (from-to)849-858
Number of pages10
JournalActa Physiologiae Plantarum
Volume34
Issue number3
DOIs
Publication statusPublished - May 2012

Fingerprint

Glutathione Reductase
glutathione-disulfide reductase
Catalase
abiotic stress
catalase
peroxidase
Antioxidants
enzyme activity
Glutathione Transferase
glutathione transferase
antioxidants
Enzymes
Ascorbate Peroxidases
Peroxidases
Temperature
winter
Water
Climate Change
peroxidases
Droughts

Keywords

  • Antioxidant activity
  • Climate change
  • Drought stress
  • Elevated CO
  • Small grain cereals

ASJC Scopus subject areas

  • Plant Science
  • Physiology
  • Agronomy and Crop Science

Cite this

Influence of abiotic stresses on the antioxidant enzyme activity of cereals. / Varga, Balázs; Janda, T.; László, Emese; Veisz, O.

In: Acta Physiologiae Plantarum, Vol. 34, No. 3, 05.2012, p. 849-858.

Research output: Contribution to journalArticle

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