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Alleviating effects of exogenous Gamma-aminobutiric acid on tomato seedling under chilling stress

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Abstract

Low temperature during germination and early seedling growth is one of the most significant limiting factors in the productivity of plants. Tomato seedling germination is sensitive to chilling stress. Gamma-aminobutyric acid (GABA), as a non-protein amino acid, involved in various stress tolerances in plants. In this study, 5-day old tomato seedlings were exposed to chilling stress (2 ± 0.05 °C for 48 h) and then the effects of 0, 100, 250, 500 and 750 μmolL−1 concentrations of GABA on electrolyte leakage, proline and malondialdehyde (MDA) content were investigated. The resultS showed that the antioxidant enzyme activity, electrolyte leakage, MDA and proline content were significantly reduced by GABA treatments. However under chilling stress seedlings treated with GABA exhibited significantly higher sugar and proline contents as compared to un-treated seedlings. These results suggest that GABA treatment protects tomato seedlings from chilling stress by enhancing some antioxidant enzymes activity and reducing MDA content which results in maintaining membrane integrity.

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Authors and Affiliations

  1. Biology Department, Faculty of Science, Urmia University, Urmia, Iran

    Parviz Malekzadeh, Jalil Khara & Reza Heydari

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  1. Parviz Malekzadeh
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  2. Jalil Khara
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  3. Reza Heydari
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Correspondence to Parviz Malekzadeh.

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Malekzadeh, P., Khara, J. & Heydari, R. Alleviating effects of exogenous Gamma-aminobutiric acid on tomato seedling under chilling stress. Physiol Mol Biol Plants 20, 133–137 (2014). https://doi.org/10.1007/s12298-013-0203-5

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  • DOI: https://doi.org/10.1007/s12298-013-0203-5

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