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Updated: Jun 3, 2025
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Untargeted Liquid Chromatography-Mass Spectrometry-Based Metabolomics Analysis of Wheat Grain
Published on: March 13, 2020
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Changes in Metabolites Produced in Wheat Plants Against Water-Deficit Stress
Valentina Spanic1, Jurica Duvnjak1, Dubravka Hefer1
1Agricultural Institute Osijek, Južno Predgrađe 17, 31000 Osijek, Croatia.
Plants (Basel, Switzerland)
|January 11, 2025
Summary
Wheat seedlings show reduced germination and growth under drought stress. Specific metabolic changes, including increased amino acids like proline, contribute to drought tolerance, offering new strategies for crop improvement.
Area of Science:
- Plant Science
- Agricultural Science
- Biochemistry
Background:
- Drought stress significantly impacts wheat (Triticum aestivum) seed germination and seedling development.
- Understanding genotypic variations in drought response is crucial for crop resilience.
Purpose of the Study:
- To analyze the effects of varying drought intensities on seed germination and seedling morphology in ten winter wheat genotypes.
- To investigate the metabolic alterations in wheat seedlings under polyethylene glycol (PEG)-induced drought stress.
Main Methods:
- Evaluation of seed germination and morphological parameters across ten winter wheat genotypes under control and drought conditions (10% and 20% PEG).
- Metabolomic profiling to identify changes in metabolic features in response to drought stress.
Main Results:
- Most wheat genotypes showed reduced germination and growth under severe drought; 'Srpanjka' exhibited higher tolerance.
- Drought stress significantly altered metabolic profiles, with 54 features affected by 10% PEG and 140 by 20% PEG.
- Key metabolites like proline, succinic acid, and aspartic acid accumulated, potentially enhancing drought tolerance.
Conclusions:
- Metabolic responses to different drought intensities (10% vs. 20% PEG) varied.
- Accumulation of specific amino acids and organic acids plays a vital role in wheat's early-stage drought tolerance mechanisms.
- Findings suggest novel metabolic targets for enhancing wheat's abiotic stress tolerance, particularly water deficit.
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