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Articles linked to this work by shared authors, journal, and citation graph.

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Biostimulants and their role in increasing cereal crops' resistance to drought stress.

Frontiers in plant science·2026
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Foliar Application of Proline and GABA Modulates the Chaperone System Response to Drought in Arabidopsis thaliana.

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Synergistic Effects of Microbial Biostimulants and Calcium in Alleviating Drought Stress in Oilseed Rape.

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GABA and Proline Application Induce Drought Resistance in Oilseed Rape.

Sigita Jurkonienė1, Virgilija Gavelienė1, Rima Mockevičiūtė1

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γ-aminobutyric acid (GABA) and proline enhance oilseed rape

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Brassica napusdrought-sensitive gene expressionrecovered growthwater deficitγ-aminobutyric acid

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Area of Science:

  • Plant Physiology
  • Biochemistry
  • Agricultural Science

Background:

  • Drought stress significantly impacts oilseed rape growth and yield.
  • Exogenous application of amino acids like GABA and proline may mitigate stress effects.
  • Understanding the biochemical mechanisms of plant stress response is crucial for crop improvement.

Purpose of the Study:

  • To investigate the effects of exogenous GABA and proline on oilseed rape under drought stress and recovery.
  • To determine if these compounds enhance plant response to water deficit and identify involved biochemical processes.
  • To compare the efficacy of GABA, proline, and their combination in improving drought tolerance.

Main Methods:

  • Oilseed rape seedlings were treated with GABA and proline solutions.
  • Plants were subjected to severe drought stress followed by re-irrigation.
  • Physiological parameters (RWC, photosynthetic pigments) and biochemical markers (proline, H2O2, MDA) were analyzed.
  • Gene expression of drought-responsive genes was assessed.

Main Results:

  • Both GABA and proline improved relative water content, photosynthetic pigments, and survival rates.
  • GABA maintained membrane integrity and PM ATPase activity, reducing stress indicators.
  • The combination of GABA and proline enhanced recovery post-drought compared to controls.
  • GABA treatment significantly increased gene expression, with combined treatment showing intermediate effects.

Conclusions:

  • Exogenous GABA and proline effectively alleviate drought stress in oilseed rape.
  • GABA demonstrates potential as an alternative to proline for enhancing crop drought tolerance.
  • Application of these amino acids can improve oilseed rape yield and quality under water-limited conditions.