State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia.
Int J Mol Sci. 2021 Sep 20;22(18):10136. doi: 10.3390/ijms221810136.
γ-aminobutyric acid (GABA) is a non-protein amino acid involved in various physiological processes; it aids in the protection of plants against abiotic stresses, such as drought, heavy metals, and salinity. GABA tends to have a protective effect against drought stress in plants by increasing osmolytes and leaf turgor and reducing oxidative damage via antioxidant regulation. Guard cell GABA production is essential, as it may provide the benefits of reducing stomatal opening and transpiration and controlling the release of tonoplast-localized anion transporter, thus resulting in increased water-use efficiency and drought tolerance. We summarized a number of scientific reports on the role and mechanism of GABA-induced drought tolerance in plants. We also discussed existing insights regarding GABA's metabolic and signaling functions used to increase plant tolerance to drought stress.
γ-氨基丁酸（GABA）是一种非蛋白质氨基酸，参与各种生理过程；它有助于植物抵御非生物胁迫，如干旱、重金属和盐度。GABA 倾向于通过增加渗透物和叶片膨压，以及通过抗氧化剂调节减少氧化损伤，对植物的干旱胁迫产生保护作用。保卫细胞 GABA 的产生是必不可少的，因为它可能通过减少气孔开度和蒸腾作用以及控制液泡定位阴离子转运体的释放来提供益处，从而提高水利用效率和抗旱性。我们总结了一些关于 GABA 诱导植物抗旱性的作用和机制的科学报告。我们还讨论了关于 GABA 的代谢和信号功能的现有见解，这些功能用于提高植物对干旱胁迫的耐受性。
