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Synergistic Application of γ-Aminobutyric Acid and Salicylic Acid Enhances Drought Resilience, Antioxidant Defense, and Essential Oil Production in Coriander | ||
| Journal of Medicinal plants and By-products | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 05 آبان 1405 اصل مقاله (726.18 K) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22034/jmpb.2027.373729.2244 | ||
| نویسندگان | ||
| Razieh Farahani؛ Alireza Pazoki* ؛ Reza Monem؛ Aliakbar Tajali | ||
| Department of Agrotechnology, YI.C., Islamic Azad University, Tehran, Iran | ||
| چکیده | ||
| Water deficit is among the most critical environmental stresses restricting coriander (Coriandrum sativum L.) productivity and altering its phytochemical composition through disruption of cellular redox homeostasis and essential oil (EO) metabolism. Although γ-aminobutyric acid (GABA) and salicylic acid (SA) have individually shown potential for improving plant responses to abiotic stress, the consequences of their combined application on drought acclimation and EO accumulation in coriander are still insufficiently characterized. Thus, the present study evaluated the separate and interactive effects of GABA and SA on physiological and biochemical responses, antioxidant activity, biological performance, and EO production under varying water availability conditions. A field trial was performed using a split-plot arrangement within a randomized complete block design with three replications. Irrigation regimes were allocated to main plots, while foliar treatments including distilled water (control), GABA (30 mM), SA (1 mM), and their combined application (GABA + SA) were assigned to subplots. Moderate water limitation stimulated the synthesis of phenolic and flavonoid compounds, whereas severe drought intensified oxidative stress and negatively affected plant growth. Under severe drought conditions, foliar application of GABA + SA enhanced drought tolerance by increasing total phenolic and flavonoid contents by 22% and 41%, respectively, while reducing H₂O₂ accumulation by 33% compared with untreated plants. Furthermore, the combined treatment improved biological yield and EO yield by 27% and 51%, respectively, under severe water stress. Principal component analysis indicated that GABA + SA treatment was closely associated with increased phytochemical accumulation and yield-related characteristics, whereas control plants exhibited stronger relationships with oxidative stress markers. Overall, these results suggest that the combined use of GABA and SA represents an effective approach for alleviating drought-related impairments and improving phytochemical quality and EO productivity in coriander, offering a promising strategy for sustainable production of medicinal and aromatic crops under limited water conditions. | ||
| کلیدواژه‌ها | ||
| Aromatic plants؛ Osmotic adjustment؛ Plant biostimulants؛ Secondary metabolites؛ Water deficit | ||
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آمار تعداد مشاهده مقاله: 3 تعداد دریافت فایل اصل مقاله: 1 |
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