Role of the durum wheat dehydrin in the function of proteases conferring salinity tolerance in Arabidopsis thaliana transgenic lines

Walid Saibi, Nabil Zouari, Khaled Masmoudi, Faiçal Brini

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Dehydrins are claimed to stabilize macromolecules against freezing damage, dehydration, ionic or osmotic stresses, thermal stress and re-folding yield. However, their precise function remains unknown. In this context, we report the behavior of protease activities in dehydrin transgenic Arabidopsis lines against the wild type plant under salt stress (100. mM NaCl). Indeed, proteases play key roles in plants, maintaining strict protein quality control and degrading specific sets of proteins in response to diverse environmental and developmental stimuli. We proved that durum wheat DHN-5 modulates the activity of some proteases, summarized on the promotion of the Cysteinyl protease and the decrease of the Aspartyl protease activity. This fact is also upgraded in salt stress conditions. We conclude that the dehydrin transgenic context encodes salinity tolerance in transgenic lines through the modulation of the interaction not only at transcriptional level but also at protein level and also with the impact of salt stress as an endogenous and exogenous effector on some biocatalysts like proteases.

Original languageEnglish
Pages (from-to)311-316
Number of pages6
JournalInternational Journal of Biological Macromolecules
Volume85
DOIs
Publication statusPublished - Apr 1 2016

Keywords

  • Aspartyl-protease
  • Cysteinyl-protease
  • Dehydrin transgenic context
  • Salinity tolerance
  • Transgenic Arabidopsis lines and biocatalyst modulation

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Economics and Econometrics
  • General Energy

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