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Food supply

Regaining Stress Tolerance in Wheat and Barley for Sustainable Food Security

Strategic Insights

— 1 min read

Researchers at the University of Western Australia have made significant progress in understanding the mechanisms behind stress tolerance in wheat and barley, two of the world's most critical staple food crops. The study, funded by the Australian Research Council and Grains R&D Corp., aimed to develop a new approach for phenotyping cereal crops for salinity stress tolerance. The research revealed that tolerant genotypes reduce sensitivity to ROS and demonstrate a tissue-and cell-specific operation of contributing mechanisms, allowing them to efficiently regulate ionic homeostasis without compromising stress-induced ROS signaling.

Key Takeaways:

  • The study highlights the importance of plant phenotyping for salinity stress tolerance, a crucial aspect of meeting food security targets under current climate scenarios.
  • The authors propose a new approach for phenotyping cereal crops, focusing on measuring H2O2-induced K+ and Ca2+ flux responses from mature root epidermis.
  • Tolerant genotypes in wheat and barley demonstrate reduced sensitivity to ROS, enabling them to efficiently regulate ionic homeostasis in a cell-and tissue-specific manner.
  • The cell-based phenotyping platform offers breeders the possibility of targeting new traits and assisting in engineering salinity stress tolerance in future breeding programs.
  • Additional research aims to explore the potential of this new approach in understanding and improving plant stress tolerance.

Statistics:

  • 44 barley, 20 durum, and 20 bread wheat accessions were screened to measure H2O2-induced K+ and Ca2+ flux responses.
  • The study focused on young (4-d old) seedlings.
  • The cell-based phenotyping platform has the potential to assist breeders in engineering salinity stress tolerance in future breeding programs.

Sources:

  • Environmental and Experimental Botany, 2025;235.
  • NewsRx, "Researchers at University of Western Australia Release New Data on Botany (Genotypic Variations In Sensitivity of Root K+ and Ca2+transporters To H2o2 Explains Differential Salt Tolerance In Wheat and Barley)" (2025).
  • University of Western Australia, School of Biological Sciences, Crawley, Wa 6009, Australia.
  • Australian Research Council, Grains R&D Corp.

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