Journal
METABOLOMICS
Volume 11, Issue 5, Pages 1363-1375Publisher
SPRINGER
DOI: 10.1007/s11306-015-0792-9
Keywords
beta-Aminobutyric acid (BABA); Drought tolerance; Flax; Metabolite profiling; Inorganic solutes; Water status
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Funding
- French Picardie Region
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beta-Aminobutyric acid (BABA) is a non-protein amino acid that induces drought tolerance in plants. The mechanisms involved in this tolerance are still poorly understood. In the present study, metabolomic and ionomic profiling performed in flax (Linum usitatissimum) leaves revealed that BABA induces a major reorganization in solute content. This reorganization resulted in increased accumulation of non-structural carbohydrates and proline and a decrease in inorganic solutes. This response has high similarities with that obtained when flax is exposed to an osmotic stress. BABA treatment also induced a decrease in osmotic potential and a change in water status of flax leaves. These modifications are accompanied by an improvement in drought tolerance.
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