Stress hormones and abiotic stresses have different effects on antioxidants in maize lines with different sensitivity

T. Kells, I. Tímár, V. Szilágyi, G. Szalai, G. Galiba, G. Kocsy

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The effect of stress hormones and abiotic stress treatments on reactive oxygen species and on antioxidants was compared in two maize (Zea mays L.) lines (Penjalinan and Z7) having different stress tolerance. Following treatment with abscisic acid, salicylic acid or hydrogen peroxide, the amount of hydrogen peroxide and lipid peroxides increased, while after osmotic stress or cultivation in continuous darkness, the levels were unchanged or decreased. The higher amount of lipid peroxides in Penjalinan indicated its greater sensitivity compared to Z7. The level of the examined antioxidants was increased by nearly all treatments. Glutathione and cysteine contents were higher after salicylic acid, hydrogen peroxide and polyethylene glycol treatments and lower after application of abscisic acid, NaCl and growth in darkness in Z7 than in Penjalinan. The activity of glutathione reductase, ascorbate peroxidase, catalase and glutathione S-transferase was higher after almost all treatments in Z7. The expression of the glutathione synthetase (EC 6.3.2.3) gene was not affected by the treatments, while the level of γ-glutamylcysteine synthetase (EC 6.3.2.2) and glutathione reductase (EC 1.6.4.2) transcripts increased after most treatments. The two stress hormones and the stress treatments resulted in different changes in antioxidant levels in the two maize lines, which indicates the specific, stress tolerance-dependent response of plants to the various growth regulators and adverse environmental effects that were examined.

Original languageEnglish
Pages (from-to)563-572
Number of pages10
JournalPlant Biology
Volume10
Issue number5
DOIs
Publication statusPublished - Sep 2008

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glutathione-disulfide reductase
glutathione synthase
antioxidant
abiotic stress
hormone
hydrogen peroxide
maize
hormones
peroxides
antioxidants
salicylic acid
stress tolerance
corn
abscisic acid
glutamate-cysteine ligase
lipids
osmotic stress
ascorbate peroxidase
polyethylene glycol
glutathione transferase

Keywords

  • Abscisic acid
  • Gene expression
  • Glutathione
  • Oxidative stress
  • Reactive oxygen species
  • Salicylic acid

ASJC Scopus subject areas

  • Plant Science

Cite this

Stress hormones and abiotic stresses have different effects on antioxidants in maize lines with different sensitivity. / Kells, T.; Tímár, I.; Szilágyi, V.; Szalai, G.; Galiba, G.; Kocsy, G.

In: Plant Biology, Vol. 10, No. 5, 09.2008, p. 563-572.

Research output: Contribution to journalArticle

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