Role of light-intensity-dependent changes in thiol and amino acid metabolism in the adaptation of wheat to drought

Mónika Gyugos, Mohamed Ahres, Zsolt Gulyás, Gabriella Szalai, Éva Darkó, Balázs Végh, Ákos Boldizsár, Zsuzsa Mednyánszky, Rup Kumar Kar, Narottam Dey, Livia Simon-Sarkadi, Gábor Galiba, Gábor Kocsy

Research output: Contribution to journalArticle


Light-intensity-dependent (low, normal and high) differences in thiol and amino acid metabolism during drought were compared in wheat seedlings. The drought-tolerant genotype (Plainsman) recovered better than the sensitive one (Cappelle Desprez) after the stress as shown by growth and photosynthetic parameters, the levels of which were greater in low and high light, respectively. Glutathione as an antioxidant contributed to this difference, since its level was twofold greater in Plainsman throughout the experiment. In addition, the accumulation of most amino acids even increased in normal light during drought in Plainsman, while such change occurred in Cappelle Desprez only in high light. The higher contents of proline, glutamate and γ-aminobutyrate are especially important because of their involvement in the protection against drought. The transcription of certain genes related to amino acid and glutathione metabolism and various antioxidants was even induced by higher light intensities before drought, which can contribute to the subsequent increase in the amount of the corresponding metabolites during stress. Increase in light intensity activated various protective mechanisms including greater accumulation of glutathione, proline and other amino acids during drought, which contributed to the efficient recovery of wheat after stress.

Original languageEnglish
Pages (from-to)562-570
Number of pages9
JournalJournal of Agronomy and Crop Science
Issue number6
Publication statusPublished - Dec 1 2019


  • drought
  • free amino acids
  • glutathione
  • light intensity
  • photosynthesis
  • wheat

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

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