Salinity is one of the most crucial abiotic stresses which is the consequence of increase in the concentration of NaCl ions influencing plant’s growth, development, and yield. Gamma-aminobutyric acid (GABA) is a non-protein amino acid involved in various metabolic processes that accumulates in many plant species during stress conditions. The present study was aimed to evaluate the effect of GABA (0 and 25 mM) and salinity (3 and 5 dS m⁻¹) on physiological characteristics and expression pattern of some salinity-related genes in strawberry cv. Aromas under soilless culture condition at 12, 24, and 36 h after treatments’ initiation. Based on the results, salinity increased the content of H₂O₂, MDA, and proline, while it decreased the percentage of MSI and the activity of SOD and POD antioxidant enzymes. In contrast, the implementation of GABA not only decreased H₂O₂ and MDA content and maintained MSI percentage, but it also improved the activity of antioxidant enzymes and the transcription level of DREB, cAPX, MnSOD, and GST genes. Under non-stress conditions, GABA acted as a mild stressor by imposing effects similar to abiotic stress which could help plants adapt under the adverse environmental conditions. We concluded that strawberry plants had a better response to salinity by enhancing both enzymatic and non-enzymatic antioxidant physiological protection mechanisms and also by increasing the transcription of salinity-related genes upon GABA application.

盐度是最重要的非生物胁迫之一，它是影响植物生长、发育和产量的 NaCl 离子浓度增加的结果。γ-氨基丁酸 (GABA) 是一种非蛋白质氨基酸，参与各种代谢过程，在胁迫条件下在许多植物物种中积累。本研究旨在评估 GABA（0 和 25 mM）和盐度（3 和 5 dS m ^-1）对草莓品种中一些盐度相关基因的生理特征和表达模式的影响。处理开始后 12、24 和 36 小时在无土培养条件下的香气。根据结果​​，盐度增加了 H ₂ O ₂的含量、MDA 和脯氨酸，而它降低了 MSI 的百分比和 SOD 和 POD 抗氧化酶的活性。相比之下，GABA 的实施不仅降低了 H ₂ O ₂和 MDA 含量并保持了 MSI 百分比，而且还提高了抗氧化酶的活性和DREB、cAPX、MnSOD和GST的转录水平基因。在非胁迫条件下，GABA 通过施加类似于非生物胁迫的作用作为温和的胁迫剂，帮助植物适应不利的环境条件。我们得出结论，草莓植物通过增强酶促和非酶促抗氧化生理保护机制以及通过增加应用 GABA 后盐度相关基因的转录，对盐度有更好的响应。