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Journal article
Physiological and Biochemical Mechanisms of Methylglyoxal-Priming-Mediated Salt Tolerance in Barley Seedlings
International Journal of Plant Biology, Vol.17(7), 58
2026
Abstract
Methylglyoxal (MG), a reactive carbonyl species, is now recognized as a novel signaling molecule regulating abiotic stress tolerance and plant growth. Using tolerant (BHL-25 and BHL-27) and susceptible (BARI Barley-6 and BHL-26) genotypes, the study aimed to reveal the detailed mechanisms of MG-priming-induced salt stress tolerance in barley (Hordeum vulgare L.). Seeds were primed with MG, and seven-day-old seedlings were transferred to hydroponic solution. After one week of seedling growth in hydroponic solutions, the salinity stress was imposed. The five treatments were as follows: control (0 salt + 0 mM MG), salt (16 dS m−1) + 0 mM MG, salt + 0.25 mM MG, salt + 0.5 mM MG, and salt + 1 mM MG. Significant genotype-dependent changes were observed in response to salt stress based on morphological, physiological and biochemical traits. Salt stress significantly impaired shoot length, shoot dry weight, root volume, root dry weight, relative water content, leaf Na+ content and K+/Na+ ratio. Salinity stress caused a significant increase in oxidative indices in all genotypes; however, the tolerant genotypes showed a lower increase. Importantly, in plants grown from MG-primed seeds, the negative effects of salt stress were reversed by modulating the K+/Na+ ratio, the activities of antioxidative and glyoxalase pathway enzymes as well as the redox state of ascorbate and glutathione. In conclusion, MG-mediated salt tolerance was linked to a reduction in reactive oxygen species (ROS) and activation of ROS and MG detoxification processes as well as favorable regulation of the K+/Na+ ratio, glutathione and ascorbate redox state that improved the growth of the barley plants under salinity.
Details
- Title
- Physiological and Biochemical Mechanisms of Methylglyoxal-Priming-Mediated Salt Tolerance in Barley Seedlings
- Authors/Creators
- Md Shahidul Islam - Bangladesh Agricultural Research InstituteAbdul Hannan - Bangladesh Agricultural Research InstituteMohammad Anwar Hossain - Bangladesh Agricultural UniversityMd Motiar Rohman - Bangladesh Agricultural Research InstituteRichard William Bell - Murdoch University, Centre for Sustainable Farming Systems
- Publication Details
- International Journal of Plant Biology, Vol.17(7), 58
- Publisher
- MDPI
- Grant note
- Australian Centre for International Agricultural Research (http://data.elsevier.com/vocabulary/SciValFunders/501100000974) LWR-2014-073 / Bangladesh and West Bengal, India Krishi Gobeshona Foundation (http://data.elsevier.com/vocabulary/SciValFunders/100018863)
- Identifiers
- 991005909775907891
- Copyright
- © 2026 by the authors.
- Murdoch Affiliation
- Centre for Sustainable Farming Systems
- Language
- English
- Resource Type
- Journal article
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